./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix009.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix009.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/mix009.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix009.oepc.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-eb4cb34-m [2024-06-21 16:17:15,848 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:17:15,910 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:17:15,917 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:17:15,917 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:17:15,954 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:17:15,956 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:17:15,957 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:17:15,957 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:17:15,958 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:17:15,958 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:17:15,958 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:17:15,959 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:17:15,961 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:17:15,961 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:17:15,961 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:17:15,962 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:17:15,964 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:17:15,965 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:17:15,965 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:17:15,965 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:17:15,965 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:17:15,966 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:17:15,966 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:17:15,966 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:17:15,966 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:17:15,966 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:17:15,967 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:17:15,967 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:17:15,967 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:17:15,968 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:17:15,968 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:17:15,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:17:15,969 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:17:15,969 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:17:15,969 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:17:15,969 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:17:15,969 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:17:15,970 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:17:15,970 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:17:15,970 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:17:15,970 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:17:15,970 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:17:15,970 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:17:16,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:17:16,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:17:16,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:17:16,240 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:17:16,240 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:17:16,241 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix009.oepc.yml/witness.yml [2024-06-21 16:17:16,350 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:17:16,350 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:17:16,351 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix009.oepc.i [2024-06-21 16:17:17,406 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:17:17,660 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:17:17,661 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix009.oepc.i [2024-06-21 16:17:17,671 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55e238672/ede8f360e18c464896fc8d57cce3426a/FLAG9a2449c51 [2024-06-21 16:17:17,680 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55e238672/ede8f360e18c464896fc8d57cce3426a [2024-06-21 16:17:17,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:17:17,681 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:17:17,682 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:17:17,682 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:17:17,686 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:17:17,686 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:17:16" (1/2) ... [2024-06-21 16:17:17,687 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5abee9e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:17:17, skipping insertion in model container [2024-06-21 16:17:17,687 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:17:16" (1/2) ... [2024-06-21 16:17:17,688 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6158c118 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:17:17, skipping insertion in model container [2024-06-21 16:17:17,688 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:17:17" (2/2) ... [2024-06-21 16:17:17,688 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5abee9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:17:17, skipping insertion in model container [2024-06-21 16:17:17,688 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:17:17" (2/2) ... [2024-06-21 16:17:17,689 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:17:17,729 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:17:17,730 INFO L97 edCorrectnessWitness]: Location invariant before [L825-L825] (((((((((((((((((! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-21 16:17:17,730 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] (((((((((((((((((! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-21 16:17:17,730 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:17:17,730 INFO L106 edCorrectnessWitness]: ghost_update [L823-L823] multithreaded = 1; [2024-06-21 16:17:17,753 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:17:18,001 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:17:18,008 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:17:18,082 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:17:18,108 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:17:18,110 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:17:18 WrapperNode [2024-06-21 16:17:18,110 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:17:18,111 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:17:18,111 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:17:18,111 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:17:18,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:17:18" (1/1) ... [2024-06-21 16:17:18,141 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:17:18" (1/1) ... [2024-06-21 16:17:18,175 INFO L138 Inliner]: procedures = 174, calls = 40, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 122 [2024-06-21 16:17:18,177 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:17:18,178 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:17:18,178 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:17:18,178 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:17:18,186 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:17:18" (1/1) ... [2024-06-21 16:17:18,187 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:17:18" (1/1) ... [2024-06-21 16:17:18,200 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:17:18" (1/1) ... [2024-06-21 16:17:18,219 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]. [2024-06-21 16:17:18,222 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:17:18" (1/1) ... [2024-06-21 16:17:18,222 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:17:18" (1/1) ... [2024-06-21 16:17:18,232 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:17:18" (1/1) ... [2024-06-21 16:17:18,233 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:17:18" (1/1) ... [2024-06-21 16:17:18,234 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:17:18" (1/1) ... [2024-06-21 16:17:18,235 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:17:18" (1/1) ... [2024-06-21 16:17:18,237 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:17:18,238 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:17:18,238 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:17:18,238 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:17:18,238 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:17:18" (1/1) ... [2024-06-21 16:17:18,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:17:18,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:17:18,258 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) [2024-06-21 16:17:18,287 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 [2024-06-21 16:17:18,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:17:18,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:17:18,310 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:17:18,310 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:17:18,310 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:17:18,310 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:17:18,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:17:18,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:17:18,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:17:18,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:17:18,312 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:17:18,410 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:17:18,411 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:17:18,633 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:17:18,637 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:17:18,773 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:17:18,773 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:17:18,780 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:17:18 BoogieIcfgContainer [2024-06-21 16:17:18,781 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:17:18,782 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:17:18,783 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:17:18,785 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:17:18,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:17:16" (1/4) ... [2024-06-21 16:17:18,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7861463f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:17:18, skipping insertion in model container [2024-06-21 16:17:18,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:17:17" (2/4) ... [2024-06-21 16:17:18,788 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7861463f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:17:18, skipping insertion in model container [2024-06-21 16:17:18,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:17:18" (3/4) ... [2024-06-21 16:17:18,788 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7861463f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:17:18, skipping insertion in model container [2024-06-21 16:17:18,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:17:18" (4/4) ... [2024-06-21 16:17:18,789 INFO L112 eAbstractionObserver]: Analyzing ICFG mix009.oepc.i [2024-06-21 16:17:18,821 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:17:18,821 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 16:17:18,821 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:17:18,882 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:17:18,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 32 transitions, 72 flow [2024-06-21 16:17:18,928 INFO L124 PetriNetUnfolderBase]: 0/30 cut-off events. [2024-06-21 16:17:18,929 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:17:18,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 30 events. 0/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 47 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:17:18,930 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 32 transitions, 72 flow [2024-06-21 16:17:18,935 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 24 transitions, 54 flow [2024-06-21 16:17:18,958 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:17:18,970 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;@8a10e4c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:17:18,970 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 16:17:18,977 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:17:18,977 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:17:18,977 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:17:18,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:18,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:17:18,978 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)] === [2024-06-21 16:17:18,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:18,983 INFO L85 PathProgramCache]: Analyzing trace with hash 337095837, now seen corresponding path program 1 times [2024-06-21 16:17:18,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:18,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292520683] [2024-06-21 16:17:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:18,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:19,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:19,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292520683] [2024-06-21 16:17:19,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292520683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:19,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:19,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:17:19,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706841698] [2024-06-21 16:17:19,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:19,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:17:19,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:19,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:17:19,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:17:19,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 32 [2024-06-21 16:17:19,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:19,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:19,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 32 [2024-06-21 16:17:19,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:19,971 INFO L124 PetriNetUnfolderBase]: 162/314 cut-off events. [2024-06-21 16:17:19,971 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-21 16:17:19,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 314 events. 162/314 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1238 event pairs, 97 based on Foata normal form. 1/305 useless extension candidates. Maximal degree in co-relation 614. Up to 288 conditions per place. [2024-06-21 16:17:19,976 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 21 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2024-06-21 16:17:19,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 117 flow [2024-06-21 16:17:19,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:17:19,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:17:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-06-21 16:17:19,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2024-06-21 16:17:19,985 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 54 flow. Second operand 3 states and 59 transitions. [2024-06-21 16:17:19,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 117 flow [2024-06-21 16:17:19,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 16:17:19,989 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 73 flow [2024-06-21 16:17:19,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2024-06-21 16:17:19,992 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2024-06-21 16:17:19,992 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 73 flow [2024-06-21 16:17:19,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:19,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:19,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:19,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:17:19,993 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)] === [2024-06-21 16:17:19,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:19,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1826570300, now seen corresponding path program 1 times [2024-06-21 16:17:19,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:19,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491075805] [2024-06-21 16:17:19,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:19,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:20,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:20,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491075805] [2024-06-21 16:17:20,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491075805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:20,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:20,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:17:20,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058799356] [2024-06-21 16:17:20,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:20,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:17:20,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:20,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:17:20,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:17:20,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 32 [2024-06-21 16:17:20,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:20,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:20,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 32 [2024-06-21 16:17:20,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:20,430 INFO L124 PetriNetUnfolderBase]: 159/309 cut-off events. [2024-06-21 16:17:20,430 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2024-06-21 16:17:20,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 309 events. 159/309 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1225 event pairs, 79 based on Foata normal form. 2/306 useless extension candidates. Maximal degree in co-relation 685. Up to 274 conditions per place. [2024-06-21 16:17:20,433 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 25 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-06-21 16:17:20,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 36 transitions, 159 flow [2024-06-21 16:17:20,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:17:20,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:17:20,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-06-21 16:17:20,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-21 16:17:20,435 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 73 flow. Second operand 4 states and 76 transitions. [2024-06-21 16:17:20,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 36 transitions, 159 flow [2024-06-21 16:17:20,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:17:20,436 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 97 flow [2024-06-21 16:17:20,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2024-06-21 16:17:20,437 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2024-06-21 16:17:20,437 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 97 flow [2024-06-21 16:17:20,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:20,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:20,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:20,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:17:20,438 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)] === [2024-06-21 16:17:20,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:20,439 INFO L85 PathProgramCache]: Analyzing trace with hash 789105080, now seen corresponding path program 1 times [2024-06-21 16:17:20,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:20,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855173562] [2024-06-21 16:17:20,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:20,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:20,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:20,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855173562] [2024-06-21 16:17:20,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855173562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:20,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:20,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:17:20,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044004873] [2024-06-21 16:17:20,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:20,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:17:20,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:20,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:17:20,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:17:20,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-21 16:17:20,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 97 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:20,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:20,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-21 16:17:20,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:21,015 INFO L124 PetriNetUnfolderBase]: 187/359 cut-off events. [2024-06-21 16:17:21,015 INFO L125 PetriNetUnfolderBase]: For 204/204 co-relation queries the response was YES. [2024-06-21 16:17:21,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 359 events. 187/359 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1389 event pairs, 83 based on Foata normal form. 2/360 useless extension candidates. Maximal degree in co-relation 878. Up to 313 conditions per place. [2024-06-21 16:17:21,019 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 30 selfloop transitions, 7 changer transitions 0/42 dead transitions. [2024-06-21 16:17:21,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 42 transitions, 209 flow [2024-06-21 16:17:21,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:17:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:17:21,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-21 16:17:21,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-21 16:17:21,021 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 97 flow. Second operand 5 states and 89 transitions. [2024-06-21 16:17:21,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 42 transitions, 209 flow [2024-06-21 16:17:21,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 42 transitions, 200 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 16:17:21,023 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 121 flow [2024-06-21 16:17:21,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2024-06-21 16:17:21,023 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2024-06-21 16:17:21,024 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 121 flow [2024-06-21 16:17:21,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:21,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:21,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:21,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:17:21,025 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)] === [2024-06-21 16:17:21,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:21,025 INFO L85 PathProgramCache]: Analyzing trace with hash -670316147, now seen corresponding path program 1 times [2024-06-21 16:17:21,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:21,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052086238] [2024-06-21 16:17:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:21,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:21,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:21,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052086238] [2024-06-21 16:17:21,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052086238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:21,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:21,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:17:21,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988209014] [2024-06-21 16:17:21,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:21,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:17:21,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:21,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:17:21,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:17:21,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-21 16:17:21,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 121 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:21,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:21,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-21 16:17:21,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:21,622 INFO L124 PetriNetUnfolderBase]: 184/356 cut-off events. [2024-06-21 16:17:21,623 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-21 16:17:21,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 356 events. 184/356 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1370 event pairs, 65 based on Foata normal form. 2/357 useless extension candidates. Maximal degree in co-relation 948. Up to 299 conditions per place. [2024-06-21 16:17:21,625 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 34 selfloop transitions, 9 changer transitions 0/48 dead transitions. [2024-06-21 16:17:21,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 48 transitions, 257 flow [2024-06-21 16:17:21,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:17:21,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:17:21,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 16:17:21,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-21 16:17:21,627 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 121 flow. Second operand 6 states and 105 transitions. [2024-06-21 16:17:21,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 48 transitions, 257 flow [2024-06-21 16:17:21,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 48 transitions, 242 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 16:17:21,629 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 145 flow [2024-06-21 16:17:21,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=145, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2024-06-21 16:17:21,629 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-06-21 16:17:21,630 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 145 flow [2024-06-21 16:17:21,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:21,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:21,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:21,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:17:21,630 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)] === [2024-06-21 16:17:21,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:21,631 INFO L85 PathProgramCache]: Analyzing trace with hash -2063748116, now seen corresponding path program 1 times [2024-06-21 16:17:21,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:21,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123497890] [2024-06-21 16:17:21,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:21,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:22,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:22,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123497890] [2024-06-21 16:17:22,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123497890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:22,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:22,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:17:22,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146690718] [2024-06-21 16:17:22,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:22,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:17:22,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:22,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:17:22,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:17:22,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 16:17:22,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 145 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 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) [2024-06-21 16:17:22,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:22,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 16:17:22,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:22,267 INFO L124 PetriNetUnfolderBase]: 230/423 cut-off events. [2024-06-21 16:17:22,267 INFO L125 PetriNetUnfolderBase]: For 639/639 co-relation queries the response was YES. [2024-06-21 16:17:22,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1247 conditions, 423 events. 230/423 cut-off events. For 639/639 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1590 event pairs, 100 based on Foata normal form. 1/423 useless extension candidates. Maximal degree in co-relation 1230. Up to 402 conditions per place. [2024-06-21 16:17:22,269 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 29 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2024-06-21 16:17:22,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 233 flow [2024-06-21 16:17:22,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:17:22,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:17:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-06-21 16:17:22,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 16:17:22,270 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 145 flow. Second operand 5 states and 66 transitions. [2024-06-21 16:17:22,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 233 flow [2024-06-21 16:17:22,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 212 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 16:17:22,273 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 151 flow [2024-06-21 16:17:22,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2024-06-21 16:17:22,273 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 11 predicate places. [2024-06-21 16:17:22,273 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 151 flow [2024-06-21 16:17:22,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 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) [2024-06-21 16:17:22,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:22,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:22,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:17:22,274 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:17:22,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:22,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1874082682, now seen corresponding path program 1 times [2024-06-21 16:17:22,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:22,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592368107] [2024-06-21 16:17:22,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:22,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:22,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:22,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592368107] [2024-06-21 16:17:22,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592368107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:22,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:22,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:17:22,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590201941] [2024-06-21 16:17:22,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:22,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:17:22,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:22,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:17:22,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:17:23,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-21 16:17:23,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 151 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:23,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:23,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-21 16:17:23,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:23,210 INFO L124 PetriNetUnfolderBase]: 223/414 cut-off events. [2024-06-21 16:17:23,211 INFO L125 PetriNetUnfolderBase]: For 887/887 co-relation queries the response was YES. [2024-06-21 16:17:23,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1277 conditions, 414 events. 223/414 cut-off events. For 887/887 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1557 event pairs, 58 based on Foata normal form. 2/415 useless extension candidates. Maximal degree in co-relation 1259. Up to 338 conditions per place. [2024-06-21 16:17:23,213 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 44 selfloop transitions, 13 changer transitions 0/62 dead transitions. [2024-06-21 16:17:23,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 343 flow [2024-06-21 16:17:23,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:23,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:23,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 16:17:23,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2024-06-21 16:17:23,214 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 151 flow. Second operand 8 states and 130 transitions. [2024-06-21 16:17:23,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 343 flow [2024-06-21 16:17:23,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 62 transitions, 332 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 16:17:23,217 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 200 flow [2024-06-21 16:17:23,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=200, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2024-06-21 16:17:23,217 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 17 predicate places. [2024-06-21 16:17:23,218 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 200 flow [2024-06-21 16:17:23,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:23,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:23,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:23,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:17:23,218 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)] === [2024-06-21 16:17:23,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:23,219 INFO L85 PathProgramCache]: Analyzing trace with hash 448318990, now seen corresponding path program 1 times [2024-06-21 16:17:23,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:23,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844065086] [2024-06-21 16:17:23,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:23,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:23,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:23,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844065086] [2024-06-21 16:17:23,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844065086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:23,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:23,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:17:23,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737767498] [2024-06-21 16:17:23,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:23,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:17:23,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:23,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:17:23,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:17:23,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 16:17:23,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:23,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:23,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 16:17:23,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:24,013 INFO L124 PetriNetUnfolderBase]: 220/408 cut-off events. [2024-06-21 16:17:24,013 INFO L125 PetriNetUnfolderBase]: For 1121/1121 co-relation queries the response was YES. [2024-06-21 16:17:24,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1385 conditions, 408 events. 220/408 cut-off events. For 1121/1121 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1488 event pairs, 58 based on Foata normal form. 3/410 useless extension candidates. Maximal degree in co-relation 1365. Up to 379 conditions per place. [2024-06-21 16:17:24,016 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 36 selfloop transitions, 8 changer transitions 0/48 dead transitions. [2024-06-21 16:17:24,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 314 flow [2024-06-21 16:17:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:17:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:17:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 78 transitions. [2024-06-21 16:17:24,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 16:17:24,017 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 200 flow. Second operand 6 states and 78 transitions. [2024-06-21 16:17:24,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 314 flow [2024-06-21 16:17:24,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 285 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 16:17:24,019 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 204 flow [2024-06-21 16:17:24,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=204, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-06-21 16:17:24,020 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 18 predicate places. [2024-06-21 16:17:24,020 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 204 flow [2024-06-21 16:17:24,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:24,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:24,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:24,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:17:24,021 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)] === [2024-06-21 16:17:24,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:24,021 INFO L85 PathProgramCache]: Analyzing trace with hash 451246899, now seen corresponding path program 1 times [2024-06-21 16:17:24,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:24,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431892540] [2024-06-21 16:17:24,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:24,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:24,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:24,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431892540] [2024-06-21 16:17:24,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431892540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:24,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:24,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:17:24,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149311985] [2024-06-21 16:17:24,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:24,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:17:24,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:24,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:17:24,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:17:24,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 16:17:24,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 204 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:24,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:24,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 16:17:24,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:24,743 INFO L124 PetriNetUnfolderBase]: 225/415 cut-off events. [2024-06-21 16:17:24,743 INFO L125 PetriNetUnfolderBase]: For 1347/1347 co-relation queries the response was YES. [2024-06-21 16:17:24,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1465 conditions, 415 events. 225/415 cut-off events. For 1347/1347 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1539 event pairs, 58 based on Foata normal form. 1/415 useless extension candidates. Maximal degree in co-relation 1443. Up to 377 conditions per place. [2024-06-21 16:17:24,745 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 39 selfloop transitions, 11 changer transitions 0/54 dead transitions. [2024-06-21 16:17:24,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 358 flow [2024-06-21 16:17:24,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:17:24,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:17:24,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 82 transitions. [2024-06-21 16:17:24,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2024-06-21 16:17:24,748 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 204 flow. Second operand 6 states and 82 transitions. [2024-06-21 16:17:24,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 358 flow [2024-06-21 16:17:24,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 54 transitions, 341 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 16:17:24,751 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 234 flow [2024-06-21 16:17:24,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-21 16:17:24,757 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 20 predicate places. [2024-06-21 16:17:24,758 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 234 flow [2024-06-21 16:17:24,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:24,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:24,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:24,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:17:24,759 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)] === [2024-06-21 16:17:24,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:24,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1031746389, now seen corresponding path program 2 times [2024-06-21 16:17:24,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:24,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792402229] [2024-06-21 16:17:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:24,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:25,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:25,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792402229] [2024-06-21 16:17:25,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792402229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:25,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:25,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:17:25,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644439730] [2024-06-21 16:17:25,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:25,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:17:25,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:25,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:17:25,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:17:25,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 16:17:25,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 234 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:25,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:25,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 16:17:25,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:25,364 INFO L124 PetriNetUnfolderBase]: 223/412 cut-off events. [2024-06-21 16:17:25,364 INFO L125 PetriNetUnfolderBase]: For 1666/1666 co-relation queries the response was YES. [2024-06-21 16:17:25,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 412 events. 223/412 cut-off events. For 1666/1666 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1536 event pairs, 57 based on Foata normal form. 1/412 useless extension candidates. Maximal degree in co-relation 1505. Up to 387 conditions per place. [2024-06-21 16:17:25,367 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 38 selfloop transitions, 8 changer transitions 0/50 dead transitions. [2024-06-21 16:17:25,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 340 flow [2024-06-21 16:17:25,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:17:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:17:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 76 transitions. [2024-06-21 16:17:25,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 16:17:25,368 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 234 flow. Second operand 6 states and 76 transitions. [2024-06-21 16:17:25,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 340 flow [2024-06-21 16:17:25,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 50 transitions, 328 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 16:17:25,372 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 243 flow [2024-06-21 16:17:25,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2024-06-21 16:17:25,373 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-06-21 16:17:25,373 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 243 flow [2024-06-21 16:17:25,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:25,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:25,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:25,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:17:25,374 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:17:25,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:25,374 INFO L85 PathProgramCache]: Analyzing trace with hash -2032978250, now seen corresponding path program 1 times [2024-06-21 16:17:25,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:25,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441186488] [2024-06-21 16:17:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:25,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:26,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:26,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441186488] [2024-06-21 16:17:26,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441186488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:26,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:26,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:26,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880111516] [2024-06-21 16:17:26,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:26,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:26,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:26,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:26,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:26,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-21 16:17:26,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 243 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:26,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:26,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-21 16:17:26,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:26,360 INFO L124 PetriNetUnfolderBase]: 217/402 cut-off events. [2024-06-21 16:17:26,376 INFO L125 PetriNetUnfolderBase]: For 2095/2095 co-relation queries the response was YES. [2024-06-21 16:17:26,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1522 conditions, 402 events. 217/402 cut-off events. For 2095/2095 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1456 event pairs, 35 based on Foata normal form. 4/405 useless extension candidates. Maximal degree in co-relation 1498. Up to 307 conditions per place. [2024-06-21 16:17:26,379 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 48 selfloop transitions, 14 changer transitions 0/69 dead transitions. [2024-06-21 16:17:26,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 419 flow [2024-06-21 16:17:26,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:26,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 16:17:26,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-21 16:17:26,381 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 243 flow. Second operand 9 states and 140 transitions. [2024-06-21 16:17:26,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 419 flow [2024-06-21 16:17:26,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 398 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 16:17:26,384 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 242 flow [2024-06-21 16:17:26,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=242, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2024-06-21 16:17:26,385 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 27 predicate places. [2024-06-21 16:17:26,386 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 242 flow [2024-06-21 16:17:26,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:26,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:26,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:26,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:17:26,386 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)] === [2024-06-21 16:17:26,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:26,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1103573389, now seen corresponding path program 1 times [2024-06-21 16:17:26,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:26,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825690036] [2024-06-21 16:17:26,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:26,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:26,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:26,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825690036] [2024-06-21 16:17:26,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825690036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:26,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:26,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:17:26,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494171997] [2024-06-21 16:17:26,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:26,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:17:26,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:26,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:17:26,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:17:26,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:26,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 43 transitions, 242 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:26,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:26,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:26,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:27,122 INFO L124 PetriNetUnfolderBase]: 238/425 cut-off events. [2024-06-21 16:17:27,122 INFO L125 PetriNetUnfolderBase]: For 2383/2383 co-relation queries the response was YES. [2024-06-21 16:17:27,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1678 conditions, 425 events. 238/425 cut-off events. For 2383/2383 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1509 event pairs, 53 based on Foata normal form. 1/425 useless extension candidates. Maximal degree in co-relation 1653. Up to 381 conditions per place. [2024-06-21 16:17:27,125 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 43 selfloop transitions, 16 changer transitions 0/61 dead transitions. [2024-06-21 16:17:27,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 61 transitions, 434 flow [2024-06-21 16:17:27,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:17:27,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:17:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-21 16:17:27,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39732142857142855 [2024-06-21 16:17:27,127 INFO L175 Difference]: Start difference. First operand has 58 places, 43 transitions, 242 flow. Second operand 7 states and 89 transitions. [2024-06-21 16:17:27,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 61 transitions, 434 flow [2024-06-21 16:17:27,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 61 transitions, 398 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 16:17:27,130 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 267 flow [2024-06-21 16:17:27,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=267, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2024-06-21 16:17:27,131 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 27 predicate places. [2024-06-21 16:17:27,131 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 267 flow [2024-06-21 16:17:27,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:27,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:27,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:27,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:17:27,131 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)] === [2024-06-21 16:17:27,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:27,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1103753127, now seen corresponding path program 1 times [2024-06-21 16:17:27,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:27,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388539645] [2024-06-21 16:17:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:27,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:27,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:27,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388539645] [2024-06-21 16:17:27,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388539645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:27,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:27,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:17:27,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313784142] [2024-06-21 16:17:27,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:27,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:17:27,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:27,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:17:27,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:17:27,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 16:17:27,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 267 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:27,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:27,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 16:17:27,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:27,801 INFO L124 PetriNetUnfolderBase]: 243/442 cut-off events. [2024-06-21 16:17:27,802 INFO L125 PetriNetUnfolderBase]: For 3157/3157 co-relation queries the response was YES. [2024-06-21 16:17:27,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1783 conditions, 442 events. 243/442 cut-off events. For 3157/3157 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1621 event pairs, 56 based on Foata normal form. 3/444 useless extension candidates. Maximal degree in co-relation 1756. Up to 373 conditions per place. [2024-06-21 16:17:27,810 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 47 selfloop transitions, 15 changer transitions 0/68 dead transitions. [2024-06-21 16:17:27,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 68 transitions, 473 flow [2024-06-21 16:17:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:17:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:17:27,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2024-06-21 16:17:27,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4330357142857143 [2024-06-21 16:17:27,811 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 267 flow. Second operand 7 states and 97 transitions. [2024-06-21 16:17:27,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 68 transitions, 473 flow [2024-06-21 16:17:27,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 68 transitions, 452 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:17:27,831 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 320 flow [2024-06-21 16:17:27,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=320, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2024-06-21 16:17:27,832 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2024-06-21 16:17:27,832 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 320 flow [2024-06-21 16:17:27,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:27,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:27,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:27,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:17:27,834 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)] === [2024-06-21 16:17:27,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:27,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1103752879, now seen corresponding path program 2 times [2024-06-21 16:17:27,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:27,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059353514] [2024-06-21 16:17:27,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:27,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:28,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:28,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059353514] [2024-06-21 16:17:28,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059353514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:28,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:28,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:17:28,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919552057] [2024-06-21 16:17:28,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:28,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:17:28,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:28,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:17:28,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:17:28,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:28,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 320 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:28,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:28,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:28,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:28,584 INFO L124 PetriNetUnfolderBase]: 260/461 cut-off events. [2024-06-21 16:17:28,584 INFO L125 PetriNetUnfolderBase]: For 3651/3651 co-relation queries the response was YES. [2024-06-21 16:17:28,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2021 conditions, 461 events. 260/461 cut-off events. For 3651/3651 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1653 event pairs, 55 based on Foata normal form. 1/461 useless extension candidates. Maximal degree in co-relation 1991. Up to 416 conditions per place. [2024-06-21 16:17:28,587 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 47 selfloop transitions, 17 changer transitions 0/66 dead transitions. [2024-06-21 16:17:28,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 66 transitions, 510 flow [2024-06-21 16:17:28,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:17:28,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:17:28,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-06-21 16:17:28,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38839285714285715 [2024-06-21 16:17:28,588 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 320 flow. Second operand 7 states and 87 transitions. [2024-06-21 16:17:28,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 66 transitions, 510 flow [2024-06-21 16:17:28,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 66 transitions, 499 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 16:17:28,592 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 360 flow [2024-06-21 16:17:28,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=360, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2024-06-21 16:17:28,593 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 37 predicate places. [2024-06-21 16:17:28,593 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 360 flow [2024-06-21 16:17:28,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:28,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:28,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:28,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:17:28,594 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)] === [2024-06-21 16:17:28,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:28,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1919367885, now seen corresponding path program 3 times [2024-06-21 16:17:28,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:28,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840176175] [2024-06-21 16:17:28,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:28,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:29,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:29,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840176175] [2024-06-21 16:17:29,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840176175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:29,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:29,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:17:29,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725743903] [2024-06-21 16:17:29,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:29,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:17:29,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:29,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:17:29,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:17:29,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:29,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 360 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:29,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:29,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:29,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:29,442 INFO L124 PetriNetUnfolderBase]: 258/458 cut-off events. [2024-06-21 16:17:29,443 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2024-06-21 16:17:29,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2070 conditions, 458 events. 258/458 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1636 event pairs, 54 based on Foata normal form. 1/458 useless extension candidates. Maximal degree in co-relation 2037. Up to 441 conditions per place. [2024-06-21 16:17:29,445 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 50 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-21 16:17:29,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 62 transitions, 496 flow [2024-06-21 16:17:29,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:17:29,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:17:29,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-06-21 16:17:29,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35267857142857145 [2024-06-21 16:17:29,446 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 360 flow. Second operand 7 states and 79 transitions. [2024-06-21 16:17:29,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 62 transitions, 496 flow [2024-06-21 16:17:29,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 62 transitions, 467 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 16:17:29,450 INFO L231 Difference]: Finished difference. Result has 71 places, 55 transitions, 356 flow [2024-06-21 16:17:29,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=356, PETRI_PLACES=71, PETRI_TRANSITIONS=55} [2024-06-21 16:17:29,451 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 40 predicate places. [2024-06-21 16:17:29,451 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 55 transitions, 356 flow [2024-06-21 16:17:29,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:29,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:29,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:29,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:17:29,452 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)] === [2024-06-21 16:17:29,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:29,452 INFO L85 PathProgramCache]: Analyzing trace with hash 185180921, now seen corresponding path program 2 times [2024-06-21 16:17:29,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:29,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113423980] [2024-06-21 16:17:29,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:29,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:29,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:29,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113423980] [2024-06-21 16:17:29,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113423980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:29,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:29,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:17:29,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502990583] [2024-06-21 16:17:29,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:29,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:17:29,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:29,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:17:29,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:17:29,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 16:17:29,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 55 transitions, 356 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:29,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:29,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 16:17:29,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:30,222 INFO L124 PetriNetUnfolderBase]: 253/459 cut-off events. [2024-06-21 16:17:30,222 INFO L125 PetriNetUnfolderBase]: For 4979/4979 co-relation queries the response was YES. [2024-06-21 16:17:30,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2093 conditions, 459 events. 253/459 cut-off events. For 4979/4979 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1707 event pairs, 54 based on Foata normal form. 3/461 useless extension candidates. Maximal degree in co-relation 2059. Up to 403 conditions per place. [2024-06-21 16:17:30,225 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 49 selfloop transitions, 13 changer transitions 0/69 dead transitions. [2024-06-21 16:17:30,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 69 transitions, 552 flow [2024-06-21 16:17:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:17:30,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:17:30,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-06-21 16:17:30,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 16:17:30,226 INFO L175 Difference]: Start difference. First operand has 71 places, 55 transitions, 356 flow. Second operand 7 states and 92 transitions. [2024-06-21 16:17:30,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 69 transitions, 552 flow [2024-06-21 16:17:30,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 516 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 16:17:30,231 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 365 flow [2024-06-21 16:17:30,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=365, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2024-06-21 16:17:30,232 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 40 predicate places. [2024-06-21 16:17:30,232 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 365 flow [2024-06-21 16:17:30,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:30,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:30,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:30,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:17:30,233 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)] === [2024-06-21 16:17:30,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:30,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1337846573, now seen corresponding path program 3 times [2024-06-21 16:17:30,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:30,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267617542] [2024-06-21 16:17:30,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:30,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:30,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:30,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267617542] [2024-06-21 16:17:30,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267617542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:30,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:30,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:17:30,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837290505] [2024-06-21 16:17:30,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:30,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:17:30,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:30,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:17:30,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:17:30,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 16:17:30,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 365 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:30,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:30,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 16:17:30,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:31,083 INFO L124 PetriNetUnfolderBase]: 247/450 cut-off events. [2024-06-21 16:17:31,083 INFO L125 PetriNetUnfolderBase]: For 5332/5332 co-relation queries the response was YES. [2024-06-21 16:17:31,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2069 conditions, 450 events. 247/450 cut-off events. For 5332/5332 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1675 event pairs, 52 based on Foata normal form. 3/452 useless extension candidates. Maximal degree in co-relation 2034. Up to 411 conditions per place. [2024-06-21 16:17:31,085 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 49 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-21 16:17:31,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 66 transitions, 505 flow [2024-06-21 16:17:31,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:17:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:17:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-06-21 16:17:31,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38839285714285715 [2024-06-21 16:17:31,087 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 365 flow. Second operand 7 states and 87 transitions. [2024-06-21 16:17:31,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 66 transitions, 505 flow [2024-06-21 16:17:31,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 66 transitions, 467 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 16:17:31,091 INFO L231 Difference]: Finished difference. Result has 73 places, 57 transitions, 352 flow [2024-06-21 16:17:31,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=352, PETRI_PLACES=73, PETRI_TRANSITIONS=57} [2024-06-21 16:17:31,092 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 42 predicate places. [2024-06-21 16:17:31,092 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 57 transitions, 352 flow [2024-06-21 16:17:31,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:31,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:31,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:31,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:17:31,093 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)] === [2024-06-21 16:17:31,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:31,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1742340626, now seen corresponding path program 1 times [2024-06-21 16:17:31,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:31,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532305113] [2024-06-21 16:17:31,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:31,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:31,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:31,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532305113] [2024-06-21 16:17:31,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532305113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:31,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:31,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:31,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029450179] [2024-06-21 16:17:31,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:31,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:31,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:31,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:31,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:31,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:31,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 57 transitions, 352 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:31,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:31,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:31,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:31,874 INFO L124 PetriNetUnfolderBase]: 264/469 cut-off events. [2024-06-21 16:17:31,875 INFO L125 PetriNetUnfolderBase]: For 5697/5697 co-relation queries the response was YES. [2024-06-21 16:17:31,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2169 conditions, 469 events. 264/469 cut-off events. For 5697/5697 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1719 event pairs, 52 based on Foata normal form. 1/469 useless extension candidates. Maximal degree in co-relation 2134. Up to 405 conditions per place. [2024-06-21 16:17:31,877 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 54 selfloop transitions, 23 changer transitions 0/79 dead transitions. [2024-06-21 16:17:31,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 79 transitions, 606 flow [2024-06-21 16:17:31,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:31,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 102 transitions. [2024-06-21 16:17:31,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3984375 [2024-06-21 16:17:31,879 INFO L175 Difference]: Start difference. First operand has 73 places, 57 transitions, 352 flow. Second operand 8 states and 102 transitions. [2024-06-21 16:17:31,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 79 transitions, 606 flow [2024-06-21 16:17:31,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 79 transitions, 580 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 16:17:31,884 INFO L231 Difference]: Finished difference. Result has 75 places, 61 transitions, 405 flow [2024-06-21 16:17:31,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=405, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2024-06-21 16:17:31,885 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2024-06-21 16:17:31,885 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 405 flow [2024-06-21 16:17:31,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:31,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:31,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:31,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:17:31,886 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)] === [2024-06-21 16:17:31,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:31,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1241359640, now seen corresponding path program 2 times [2024-06-21 16:17:31,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:31,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457185411] [2024-06-21 16:17:31,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:31,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:32,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:32,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457185411] [2024-06-21 16:17:32,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457185411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:32,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:32,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:32,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689236090] [2024-06-21 16:17:32,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:32,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:32,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:32,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:32,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:32,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:32,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 405 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:32,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:32,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:32,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:32,555 INFO L124 PetriNetUnfolderBase]: 267/474 cut-off events. [2024-06-21 16:17:32,555 INFO L125 PetriNetUnfolderBase]: For 6423/6423 co-relation queries the response was YES. [2024-06-21 16:17:32,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2289 conditions, 474 events. 267/474 cut-off events. For 6423/6423 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1745 event pairs, 52 based on Foata normal form. 1/474 useless extension candidates. Maximal degree in co-relation 2253. Up to 409 conditions per place. [2024-06-21 16:17:32,557 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 53 selfloop transitions, 23 changer transitions 0/78 dead transitions. [2024-06-21 16:17:32,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 78 transitions, 643 flow [2024-06-21 16:17:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:32,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-21 16:17:32,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-21 16:17:32,559 INFO L175 Difference]: Start difference. First operand has 75 places, 61 transitions, 405 flow. Second operand 8 states and 100 transitions. [2024-06-21 16:17:32,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 78 transitions, 643 flow [2024-06-21 16:17:32,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 78 transitions, 602 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 16:17:32,565 INFO L231 Difference]: Finished difference. Result has 79 places, 63 transitions, 431 flow [2024-06-21 16:17:32,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=431, PETRI_PLACES=79, PETRI_TRANSITIONS=63} [2024-06-21 16:17:32,565 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 48 predicate places. [2024-06-21 16:17:32,565 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 63 transitions, 431 flow [2024-06-21 16:17:32,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:32,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:32,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:32,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:17:32,566 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)] === [2024-06-21 16:17:32,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:32,567 INFO L85 PathProgramCache]: Analyzing trace with hash -148962163, now seen corresponding path program 1 times [2024-06-21 16:17:32,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:32,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806754574] [2024-06-21 16:17:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:32,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:33,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:33,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806754574] [2024-06-21 16:17:33,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806754574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:33,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:33,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:33,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247172842] [2024-06-21 16:17:33,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:33,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:33,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:33,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:33,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:33,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:33,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 63 transitions, 431 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:33,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:33,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:33,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:33,348 INFO L124 PetriNetUnfolderBase]: 286/505 cut-off events. [2024-06-21 16:17:33,348 INFO L125 PetriNetUnfolderBase]: For 7766/7766 co-relation queries the response was YES. [2024-06-21 16:17:33,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2474 conditions, 505 events. 286/505 cut-off events. For 7766/7766 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1888 event pairs, 55 based on Foata normal form. 3/507 useless extension candidates. Maximal degree in co-relation 2436. Up to 388 conditions per place. [2024-06-21 16:17:33,351 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 61 selfloop transitions, 25 changer transitions 0/88 dead transitions. [2024-06-21 16:17:33,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 88 transitions, 717 flow [2024-06-21 16:17:33,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-21 16:17:33,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41796875 [2024-06-21 16:17:33,353 INFO L175 Difference]: Start difference. First operand has 79 places, 63 transitions, 431 flow. Second operand 8 states and 107 transitions. [2024-06-21 16:17:33,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 88 transitions, 717 flow [2024-06-21 16:17:33,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 88 transitions, 680 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 16:17:33,362 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 477 flow [2024-06-21 16:17:33,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=477, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2024-06-21 16:17:33,362 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2024-06-21 16:17:33,362 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 477 flow [2024-06-21 16:17:33,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:33,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:33,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:33,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:17:33,363 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)] === [2024-06-21 16:17:33,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:33,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1246931487, now seen corresponding path program 2 times [2024-06-21 16:17:33,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:33,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628204389] [2024-06-21 16:17:33,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:33,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:33,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:33,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628204389] [2024-06-21 16:17:33,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628204389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:33,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:33,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:33,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604559441] [2024-06-21 16:17:33,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:33,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:33,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:33,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:33,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:33,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:33,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 477 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:33,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:33,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:33,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:34,137 INFO L124 PetriNetUnfolderBase]: 310/544 cut-off events. [2024-06-21 16:17:34,137 INFO L125 PetriNetUnfolderBase]: For 9319/9319 co-relation queries the response was YES. [2024-06-21 16:17:34,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2792 conditions, 544 events. 310/544 cut-off events. For 9319/9319 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2067 event pairs, 63 based on Foata normal form. 3/546 useless extension candidates. Maximal degree in co-relation 2753. Up to 408 conditions per place. [2024-06-21 16:17:34,141 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 61 selfloop transitions, 27 changer transitions 0/90 dead transitions. [2024-06-21 16:17:34,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 90 transitions, 809 flow [2024-06-21 16:17:34,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:34,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-21 16:17:34,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140625 [2024-06-21 16:17:34,143 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 477 flow. Second operand 8 states and 106 transitions. [2024-06-21 16:17:34,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 90 transitions, 809 flow [2024-06-21 16:17:34,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 90 transitions, 773 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 16:17:34,151 INFO L231 Difference]: Finished difference. Result has 86 places, 71 transitions, 532 flow [2024-06-21 16:17:34,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=532, PETRI_PLACES=86, PETRI_TRANSITIONS=71} [2024-06-21 16:17:34,151 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2024-06-21 16:17:34,151 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 71 transitions, 532 flow [2024-06-21 16:17:34,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:34,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:34,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:34,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:17:34,152 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)] === [2024-06-21 16:17:34,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:34,152 INFO L85 PathProgramCache]: Analyzing trace with hash -143398190, now seen corresponding path program 3 times [2024-06-21 16:17:34,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:34,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066891294] [2024-06-21 16:17:34,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:34,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:34,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:34,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066891294] [2024-06-21 16:17:34,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066891294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:34,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:34,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:34,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573519079] [2024-06-21 16:17:34,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:34,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:34,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:34,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:34,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:34,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:34,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 71 transitions, 532 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:34,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:34,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:34,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:34,892 INFO L124 PetriNetUnfolderBase]: 313/549 cut-off events. [2024-06-21 16:17:34,892 INFO L125 PetriNetUnfolderBase]: For 9921/9921 co-relation queries the response was YES. [2024-06-21 16:17:34,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2915 conditions, 549 events. 313/549 cut-off events. For 9921/9921 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2086 event pairs, 66 based on Foata normal form. 1/549 useless extension candidates. Maximal degree in co-relation 2874. Up to 483 conditions per place. [2024-06-21 16:17:34,895 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 59 selfloop transitions, 24 changer transitions 0/85 dead transitions. [2024-06-21 16:17:34,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 85 transitions, 780 flow [2024-06-21 16:17:34,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:34,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-21 16:17:34,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3828125 [2024-06-21 16:17:34,897 INFO L175 Difference]: Start difference. First operand has 86 places, 71 transitions, 532 flow. Second operand 8 states and 98 transitions. [2024-06-21 16:17:34,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 85 transitions, 780 flow [2024-06-21 16:17:34,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 85 transitions, 741 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 16:17:34,904 INFO L231 Difference]: Finished difference. Result has 90 places, 73 transitions, 560 flow [2024-06-21 16:17:34,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=560, PETRI_PLACES=90, PETRI_TRANSITIONS=73} [2024-06-21 16:17:34,905 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 59 predicate places. [2024-06-21 16:17:34,905 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 73 transitions, 560 flow [2024-06-21 16:17:34,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:34,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:34,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:34,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:17:34,906 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)] === [2024-06-21 16:17:34,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:34,906 INFO L85 PathProgramCache]: Analyzing trace with hash -143397973, now seen corresponding path program 3 times [2024-06-21 16:17:34,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:34,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437770362] [2024-06-21 16:17:34,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:34,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:35,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:35,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437770362] [2024-06-21 16:17:35,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437770362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:35,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:35,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:35,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694495211] [2024-06-21 16:17:35,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:35,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:35,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:35,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:35,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:35,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:35,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 73 transitions, 560 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:35,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:35,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:35,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:35,705 INFO L124 PetriNetUnfolderBase]: 307/540 cut-off events. [2024-06-21 16:17:35,705 INFO L125 PetriNetUnfolderBase]: For 10696/10696 co-relation queries the response was YES. [2024-06-21 16:17:35,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2842 conditions, 540 events. 307/540 cut-off events. For 10696/10696 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2049 event pairs, 61 based on Foata normal form. 3/542 useless extension candidates. Maximal degree in co-relation 2800. Up to 409 conditions per place. [2024-06-21 16:17:35,709 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 65 selfloop transitions, 26 changer transitions 0/93 dead transitions. [2024-06-21 16:17:35,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 93 transitions, 836 flow [2024-06-21 16:17:35,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:35,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 108 transitions. [2024-06-21 16:17:35,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 16:17:35,711 INFO L175 Difference]: Start difference. First operand has 90 places, 73 transitions, 560 flow. Second operand 8 states and 108 transitions. [2024-06-21 16:17:35,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 93 transitions, 836 flow [2024-06-21 16:17:35,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 93 transitions, 793 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 16:17:35,723 INFO L231 Difference]: Finished difference. Result has 93 places, 73 transitions, 574 flow [2024-06-21 16:17:35,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=574, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2024-06-21 16:17:35,724 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 62 predicate places. [2024-06-21 16:17:35,724 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 574 flow [2024-06-21 16:17:35,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:35,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:35,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:35,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:17:35,725 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)] === [2024-06-21 16:17:35,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:35,725 INFO L85 PathProgramCache]: Analyzing trace with hash -619605644, now seen corresponding path program 1 times [2024-06-21 16:17:35,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:35,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483849722] [2024-06-21 16:17:35,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:35,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:36,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:36,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483849722] [2024-06-21 16:17:36,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483849722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:36,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:36,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:36,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162092953] [2024-06-21 16:17:36,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:36,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:36,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:36,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:36,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:36,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 16:17:36,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 574 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:36,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:36,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 16:17:36,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:36,869 INFO L124 PetriNetUnfolderBase]: 280/511 cut-off events. [2024-06-21 16:17:36,869 INFO L125 PetriNetUnfolderBase]: For 11033/11033 co-relation queries the response was YES. [2024-06-21 16:17:36,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2718 conditions, 511 events. 280/511 cut-off events. For 11033/11033 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1988 event pairs, 51 based on Foata normal form. 2/512 useless extension candidates. Maximal degree in co-relation 2675. Up to 449 conditions per place. [2024-06-21 16:17:36,873 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 62 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2024-06-21 16:17:36,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 85 transitions, 760 flow [2024-06-21 16:17:36,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-21 16:17:36,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37890625 [2024-06-21 16:17:36,874 INFO L175 Difference]: Start difference. First operand has 93 places, 73 transitions, 574 flow. Second operand 8 states and 97 transitions. [2024-06-21 16:17:36,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 85 transitions, 760 flow [2024-06-21 16:17:36,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 85 transitions, 702 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:17:36,884 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 565 flow [2024-06-21 16:17:36,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=565, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2024-06-21 16:17:36,885 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 63 predicate places. [2024-06-21 16:17:36,885 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 565 flow [2024-06-21 16:17:36,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:36,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:36,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:36,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:17:36,886 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)] === [2024-06-21 16:17:36,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:36,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1485632509, now seen corresponding path program 4 times [2024-06-21 16:17:36,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:36,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496003255] [2024-06-21 16:17:36,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:36,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:37,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:37,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496003255] [2024-06-21 16:17:37,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496003255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:37,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:37,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:37,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123490181] [2024-06-21 16:17:37,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:37,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:37,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:37,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:37,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:37,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:37,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 565 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:37,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:37,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:37,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:37,658 INFO L124 PetriNetUnfolderBase]: 312/549 cut-off events. [2024-06-21 16:17:37,659 INFO L125 PetriNetUnfolderBase]: For 12074/12074 co-relation queries the response was YES. [2024-06-21 16:17:37,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2923 conditions, 549 events. 312/549 cut-off events. For 12074/12074 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2089 event pairs, 54 based on Foata normal form. 3/551 useless extension candidates. Maximal degree in co-relation 2879. Up to 478 conditions per place. [2024-06-21 16:17:37,663 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 72 selfloop transitions, 18 changer transitions 0/92 dead transitions. [2024-06-21 16:17:37,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 92 transitions, 845 flow [2024-06-21 16:17:37,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:37,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:37,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-21 16:17:37,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3828125 [2024-06-21 16:17:37,664 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 565 flow. Second operand 8 states and 98 transitions. [2024-06-21 16:17:37,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 92 transitions, 845 flow [2024-06-21 16:17:37,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 92 transitions, 809 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 16:17:37,675 INFO L231 Difference]: Finished difference. Result has 96 places, 77 transitions, 586 flow [2024-06-21 16:17:37,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=586, PETRI_PLACES=96, PETRI_TRANSITIONS=77} [2024-06-21 16:17:37,677 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 65 predicate places. [2024-06-21 16:17:37,677 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 77 transitions, 586 flow [2024-06-21 16:17:37,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:37,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:37,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:37,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:17:37,678 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)] === [2024-06-21 16:17:37,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:37,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1485632726, now seen corresponding path program 4 times [2024-06-21 16:17:37,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:37,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830791325] [2024-06-21 16:17:37,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:37,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:38,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:38,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830791325] [2024-06-21 16:17:38,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830791325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:38,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:38,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:38,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119332539] [2024-06-21 16:17:38,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:38,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:38,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:38,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:38,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:38,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:38,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 77 transitions, 586 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:38,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:38,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:38,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:38,483 INFO L124 PetriNetUnfolderBase]: 310/546 cut-off events. [2024-06-21 16:17:38,483 INFO L125 PetriNetUnfolderBase]: For 12298/12298 co-relation queries the response was YES. [2024-06-21 16:17:38,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2949 conditions, 546 events. 310/546 cut-off events. For 12298/12298 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2078 event pairs, 60 based on Foata normal form. 1/546 useless extension candidates. Maximal degree in co-relation 2904. Up to 526 conditions per place. [2024-06-21 16:17:38,492 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 71 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2024-06-21 16:17:38,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 85 transitions, 770 flow [2024-06-21 16:17:38,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:38,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:38,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 16:17:38,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2024-06-21 16:17:38,494 INFO L175 Difference]: Start difference. First operand has 96 places, 77 transitions, 586 flow. Second operand 8 states and 88 transitions. [2024-06-21 16:17:38,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 85 transitions, 770 flow [2024-06-21 16:17:38,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 85 transitions, 705 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 16:17:38,508 INFO L231 Difference]: Finished difference. Result has 97 places, 77 transitions, 550 flow [2024-06-21 16:17:38,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=550, PETRI_PLACES=97, PETRI_TRANSITIONS=77} [2024-06-21 16:17:38,509 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 66 predicate places. [2024-06-21 16:17:38,509 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 77 transitions, 550 flow [2024-06-21 16:17:38,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:38,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:38,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:38,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:17:38,509 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)] === [2024-06-21 16:17:38,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:38,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1485625069, now seen corresponding path program 5 times [2024-06-21 16:17:38,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:38,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987696073] [2024-06-21 16:17:38,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:38,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:39,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:39,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987696073] [2024-06-21 16:17:39,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987696073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:39,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:39,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:39,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837804567] [2024-06-21 16:17:39,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:39,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:39,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:39,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:39,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:39,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:39,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 77 transitions, 550 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:39,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:39,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:39,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:39,347 INFO L124 PetriNetUnfolderBase]: 319/561 cut-off events. [2024-06-21 16:17:39,347 INFO L125 PetriNetUnfolderBase]: For 13750/13750 co-relation queries the response was YES. [2024-06-21 16:17:39,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2980 conditions, 561 events. 319/561 cut-off events. For 13750/13750 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2164 event pairs, 60 based on Foata normal form. 3/563 useless extension candidates. Maximal degree in co-relation 2934. Up to 483 conditions per place. [2024-06-21 16:17:39,350 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 73 selfloop transitions, 19 changer transitions 0/94 dead transitions. [2024-06-21 16:17:39,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 94 transitions, 836 flow [2024-06-21 16:17:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:39,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-21 16:17:39,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38671875 [2024-06-21 16:17:39,351 INFO L175 Difference]: Start difference. First operand has 97 places, 77 transitions, 550 flow. Second operand 8 states and 99 transitions. [2024-06-21 16:17:39,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 94 transitions, 836 flow [2024-06-21 16:17:39,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 94 transitions, 776 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 16:17:39,363 INFO L231 Difference]: Finished difference. Result has 95 places, 79 transitions, 547 flow [2024-06-21 16:17:39,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=547, PETRI_PLACES=95, PETRI_TRANSITIONS=79} [2024-06-21 16:17:39,363 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 64 predicate places. [2024-06-21 16:17:39,363 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 79 transitions, 547 flow [2024-06-21 16:17:39,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:39,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:39,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:39,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:17:39,364 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)] === [2024-06-21 16:17:39,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:39,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1476428299, now seen corresponding path program 6 times [2024-06-21 16:17:39,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:39,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117230441] [2024-06-21 16:17:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:39,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:39,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:39,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117230441] [2024-06-21 16:17:39,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117230441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:39,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:39,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:39,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636654115] [2024-06-21 16:17:39,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:39,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:39,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:39,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:39,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:39,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:39,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 79 transitions, 547 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:39,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:39,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:39,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:40,158 INFO L124 PetriNetUnfolderBase]: 313/552 cut-off events. [2024-06-21 16:17:40,158 INFO L125 PetriNetUnfolderBase]: For 13837/13837 co-relation queries the response was YES. [2024-06-21 16:17:40,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2916 conditions, 552 events. 313/552 cut-off events. For 13837/13837 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2129 event pairs, 58 based on Foata normal form. 3/554 useless extension candidates. Maximal degree in co-relation 2870. Up to 516 conditions per place. [2024-06-21 16:17:40,161 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 77 selfloop transitions, 12 changer transitions 0/91 dead transitions. [2024-06-21 16:17:40,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 91 transitions, 755 flow [2024-06-21 16:17:40,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:40,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:40,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 92 transitions. [2024-06-21 16:17:40,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.359375 [2024-06-21 16:17:40,163 INFO L175 Difference]: Start difference. First operand has 95 places, 79 transitions, 547 flow. Second operand 8 states and 92 transitions. [2024-06-21 16:17:40,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 91 transitions, 755 flow [2024-06-21 16:17:40,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 91 transitions, 718 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 16:17:40,177 INFO L231 Difference]: Finished difference. Result has 98 places, 79 transitions, 539 flow [2024-06-21 16:17:40,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=539, PETRI_PLACES=98, PETRI_TRANSITIONS=79} [2024-06-21 16:17:40,177 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 67 predicate places. [2024-06-21 16:17:40,177 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 79 transitions, 539 flow [2024-06-21 16:17:40,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:40,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:40,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:40,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:17:40,178 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)] === [2024-06-21 16:17:40,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:40,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1476089686, now seen corresponding path program 1 times [2024-06-21 16:17:40,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:40,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580997226] [2024-06-21 16:17:40,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:40,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:41,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:41,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580997226] [2024-06-21 16:17:41,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580997226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:41,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:41,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:41,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591931336] [2024-06-21 16:17:41,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:41,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:41,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:41,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:41,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:41,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 16:17:41,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 79 transitions, 539 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-21 16:17:41,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:41,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 16:17:41,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:41,606 INFO L124 PetriNetUnfolderBase]: 282/519 cut-off events. [2024-06-21 16:17:41,606 INFO L125 PetriNetUnfolderBase]: For 13801/13801 co-relation queries the response was YES. [2024-06-21 16:17:41,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2713 conditions, 519 events. 282/519 cut-off events. For 13801/13801 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2048 event pairs, 56 based on Foata normal form. 2/520 useless extension candidates. Maximal degree in co-relation 2666. Up to 455 conditions per place. [2024-06-21 16:17:41,610 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 65 selfloop transitions, 11 changer transitions 0/89 dead transitions. [2024-06-21 16:17:41,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 89 transitions, 713 flow [2024-06-21 16:17:41,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:41,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:41,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-21 16:17:41,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37109375 [2024-06-21 16:17:41,621 INFO L175 Difference]: Start difference. First operand has 98 places, 79 transitions, 539 flow. Second operand 8 states and 95 transitions. [2024-06-21 16:17:41,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 89 transitions, 713 flow [2024-06-21 16:17:41,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 89 transitions, 673 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 16:17:41,635 INFO L231 Difference]: Finished difference. Result has 98 places, 79 transitions, 525 flow [2024-06-21 16:17:41,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=525, PETRI_PLACES=98, PETRI_TRANSITIONS=79} [2024-06-21 16:17:41,636 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 67 predicate places. [2024-06-21 16:17:41,636 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 79 transitions, 525 flow [2024-06-21 16:17:41,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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) [2024-06-21 16:17:41,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:41,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:41,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:17:41,637 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)] === [2024-06-21 16:17:41,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:41,637 INFO L85 PathProgramCache]: Analyzing trace with hash -177202144, now seen corresponding path program 1 times [2024-06-21 16:17:41,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:41,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353485517] [2024-06-21 16:17:41,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:41,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:42,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:42,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353485517] [2024-06-21 16:17:42,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353485517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:42,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:42,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:42,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351145922] [2024-06-21 16:17:42,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:42,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:42,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:42,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:42,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:42,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:42,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 79 transitions, 525 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:42,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:42,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:42,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:42,624 INFO L124 PetriNetUnfolderBase]: 313/552 cut-off events. [2024-06-21 16:17:42,624 INFO L125 PetriNetUnfolderBase]: For 14413/14413 co-relation queries the response was YES. [2024-06-21 16:17:42,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2894 conditions, 552 events. 313/552 cut-off events. For 14413/14413 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2110 event pairs, 60 based on Foata normal form. 1/552 useless extension candidates. Maximal degree in co-relation 2846. Up to 505 conditions per place. [2024-06-21 16:17:42,627 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 86 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-06-21 16:17:42,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 102 transitions, 791 flow [2024-06-21 16:17:42,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:42,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:42,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 16:17:42,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784722222222222 [2024-06-21 16:17:42,628 INFO L175 Difference]: Start difference. First operand has 98 places, 79 transitions, 525 flow. Second operand 9 states and 109 transitions. [2024-06-21 16:17:42,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 102 transitions, 791 flow [2024-06-21 16:17:42,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 102 transitions, 765 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:17:42,643 INFO L231 Difference]: Finished difference. Result has 101 places, 81 transitions, 550 flow [2024-06-21 16:17:42,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=550, PETRI_PLACES=101, PETRI_TRANSITIONS=81} [2024-06-21 16:17:42,646 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 70 predicate places. [2024-06-21 16:17:42,646 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 81 transitions, 550 flow [2024-06-21 16:17:42,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:42,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:42,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:42,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:17:42,646 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)] === [2024-06-21 16:17:42,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:42,647 INFO L85 PathProgramCache]: Analyzing trace with hash -177197308, now seen corresponding path program 1 times [2024-06-21 16:17:42,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:42,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506269864] [2024-06-21 16:17:42,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:42,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:43,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:43,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506269864] [2024-06-21 16:17:43,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506269864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:43,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:43,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:43,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991789014] [2024-06-21 16:17:43,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:43,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:43,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:43,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:43,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:43,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:43,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 81 transitions, 550 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:43,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:43,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:43,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:43,521 INFO L124 PetriNetUnfolderBase]: 332/583 cut-off events. [2024-06-21 16:17:43,522 INFO L125 PetriNetUnfolderBase]: For 17088/17088 co-relation queries the response was YES. [2024-06-21 16:17:43,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3122 conditions, 583 events. 332/583 cut-off events. For 17088/17088 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2291 event pairs, 54 based on Foata normal form. 3/585 useless extension candidates. Maximal degree in co-relation 3073. Up to 359 conditions per place. [2024-06-21 16:17:43,526 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 68 selfloop transitions, 42 changer transitions 0/112 dead transitions. [2024-06-21 16:17:43,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 112 transitions, 926 flow [2024-06-21 16:17:43,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:43,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:43,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-06-21 16:17:43,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2024-06-21 16:17:43,527 INFO L175 Difference]: Start difference. First operand has 101 places, 81 transitions, 550 flow. Second operand 9 states and 123 transitions. [2024-06-21 16:17:43,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 112 transitions, 926 flow [2024-06-21 16:17:43,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 112 transitions, 891 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 16:17:43,548 INFO L231 Difference]: Finished difference. Result has 103 places, 85 transitions, 636 flow [2024-06-21 16:17:43,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=636, PETRI_PLACES=103, PETRI_TRANSITIONS=85} [2024-06-21 16:17:43,549 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 72 predicate places. [2024-06-21 16:17:43,549 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 85 transitions, 636 flow [2024-06-21 16:17:43,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:43,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:43,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:43,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:17:43,550 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)] === [2024-06-21 16:17:43,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:43,550 INFO L85 PathProgramCache]: Analyzing trace with hash -177197494, now seen corresponding path program 2 times [2024-06-21 16:17:43,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:43,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300627689] [2024-06-21 16:17:43,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:43,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:43,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:44,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:44,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300627689] [2024-06-21 16:17:44,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300627689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:44,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:44,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:44,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427938650] [2024-06-21 16:17:44,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:44,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:44,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:44,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:44,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:44,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:44,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 85 transitions, 636 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:44,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:44,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:44,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:44,441 INFO L124 PetriNetUnfolderBase]: 335/588 cut-off events. [2024-06-21 16:17:44,441 INFO L125 PetriNetUnfolderBase]: For 17550/17550 co-relation queries the response was YES. [2024-06-21 16:17:44,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3315 conditions, 588 events. 335/588 cut-off events. For 17550/17550 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2315 event pairs, 65 based on Foata normal form. 1/588 useless extension candidates. Maximal degree in co-relation 3265. Up to 500 conditions per place. [2024-06-21 16:17:44,444 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 75 selfloop transitions, 31 changer transitions 0/108 dead transitions. [2024-06-21 16:17:44,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 108 transitions, 990 flow [2024-06-21 16:17:44,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:44,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-21 16:17:44,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3923611111111111 [2024-06-21 16:17:44,445 INFO L175 Difference]: Start difference. First operand has 103 places, 85 transitions, 636 flow. Second operand 9 states and 113 transitions. [2024-06-21 16:17:44,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 108 transitions, 990 flow [2024-06-21 16:17:44,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 108 transitions, 932 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 16:17:44,464 INFO L231 Difference]: Finished difference. Result has 107 places, 89 transitions, 685 flow [2024-06-21 16:17:44,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=685, PETRI_PLACES=107, PETRI_TRANSITIONS=89} [2024-06-21 16:17:44,465 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 76 predicate places. [2024-06-21 16:17:44,465 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 89 transitions, 685 flow [2024-06-21 16:17:44,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:44,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:44,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:44,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:17:44,466 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)] === [2024-06-21 16:17:44,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:44,466 INFO L85 PathProgramCache]: Analyzing trace with hash -322865524, now seen corresponding path program 3 times [2024-06-21 16:17:44,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:44,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707782674] [2024-06-21 16:17:44,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:44,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:45,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:45,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707782674] [2024-06-21 16:17:45,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707782674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:45,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:45,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:45,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054718674] [2024-06-21 16:17:45,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:45,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:45,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:45,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:45,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:45,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:45,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 89 transitions, 685 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:45,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:45,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:45,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:45,304 INFO L124 PetriNetUnfolderBase]: 338/593 cut-off events. [2024-06-21 16:17:45,304 INFO L125 PetriNetUnfolderBase]: For 18769/18769 co-relation queries the response was YES. [2024-06-21 16:17:45,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3424 conditions, 593 events. 338/593 cut-off events. For 18769/18769 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2338 event pairs, 65 based on Foata normal form. 1/593 useless extension candidates. Maximal degree in co-relation 3372. Up to 504 conditions per place. [2024-06-21 16:17:45,307 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 74 selfloop transitions, 31 changer transitions 0/107 dead transitions. [2024-06-21 16:17:45,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 107 transitions, 1017 flow [2024-06-21 16:17:45,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:45,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:45,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 16:17:45,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854166666666667 [2024-06-21 16:17:45,309 INFO L175 Difference]: Start difference. First operand has 107 places, 89 transitions, 685 flow. Second operand 9 states and 111 transitions. [2024-06-21 16:17:45,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 107 transitions, 1017 flow [2024-06-21 16:17:45,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 107 transitions, 966 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 16:17:45,329 INFO L231 Difference]: Finished difference. Result has 111 places, 91 transitions, 723 flow [2024-06-21 16:17:45,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=723, PETRI_PLACES=111, PETRI_TRANSITIONS=91} [2024-06-21 16:17:45,329 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2024-06-21 16:17:45,332 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 91 transitions, 723 flow [2024-06-21 16:17:45,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:45,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:45,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:45,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:17:45,332 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)] === [2024-06-21 16:17:45,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:45,333 INFO L85 PathProgramCache]: Analyzing trace with hash -156631558, now seen corresponding path program 2 times [2024-06-21 16:17:45,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:45,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509582257] [2024-06-21 16:17:45,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:45,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:45,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:45,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509582257] [2024-06-21 16:17:45,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509582257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:45,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:45,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:45,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043976177] [2024-06-21 16:17:45,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:45,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:45,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:45,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:45,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:45,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:45,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 91 transitions, 723 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:45,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:45,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:45,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:46,173 INFO L124 PetriNetUnfolderBase]: 362/632 cut-off events. [2024-06-21 16:17:46,173 INFO L125 PetriNetUnfolderBase]: For 22426/22426 co-relation queries the response was YES. [2024-06-21 16:17:46,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3716 conditions, 632 events. 362/632 cut-off events. For 22426/22426 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2543 event pairs, 52 based on Foata normal form. 3/634 useless extension candidates. Maximal degree in co-relation 3662. Up to 389 conditions per place. [2024-06-21 16:17:46,176 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 81 selfloop transitions, 39 changer transitions 0/122 dead transitions. [2024-06-21 16:17:46,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 122 transitions, 1189 flow [2024-06-21 16:17:46,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:46,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:46,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-06-21 16:17:46,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340277777777778 [2024-06-21 16:17:46,178 INFO L175 Difference]: Start difference. First operand has 111 places, 91 transitions, 723 flow. Second operand 9 states and 125 transitions. [2024-06-21 16:17:46,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 122 transitions, 1189 flow [2024-06-21 16:17:46,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 122 transitions, 1133 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 16:17:46,205 INFO L231 Difference]: Finished difference. Result has 114 places, 95 transitions, 778 flow [2024-06-21 16:17:46,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=778, PETRI_PLACES=114, PETRI_TRANSITIONS=95} [2024-06-21 16:17:46,206 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 83 predicate places. [2024-06-21 16:17:46,206 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 95 transitions, 778 flow [2024-06-21 16:17:46,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:46,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:46,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:46,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:17:46,206 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)] === [2024-06-21 16:17:46,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:46,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1822196078, now seen corresponding path program 3 times [2024-06-21 16:17:46,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:46,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247207545] [2024-06-21 16:17:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:46,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:46,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:46,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247207545] [2024-06-21 16:17:46,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247207545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:46,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:46,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:46,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089935339] [2024-06-21 16:17:46,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:46,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:46,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:46,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:46,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:46,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:46,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 95 transitions, 778 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:46,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:46,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:46,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:47,101 INFO L124 PetriNetUnfolderBase]: 356/623 cut-off events. [2024-06-21 16:17:47,101 INFO L125 PetriNetUnfolderBase]: For 22346/22346 co-relation queries the response was YES. [2024-06-21 16:17:47,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3689 conditions, 623 events. 356/623 cut-off events. For 22346/22346 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2505 event pairs, 54 based on Foata normal form. 3/625 useless extension candidates. Maximal degree in co-relation 3634. Up to 385 conditions per place. [2024-06-21 16:17:47,105 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 77 selfloop transitions, 40 changer transitions 0/119 dead transitions. [2024-06-21 16:17:47,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 119 transitions, 1140 flow [2024-06-21 16:17:47,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:47,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-06-21 16:17:47,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4201388888888889 [2024-06-21 16:17:47,106 INFO L175 Difference]: Start difference. First operand has 114 places, 95 transitions, 778 flow. Second operand 9 states and 121 transitions. [2024-06-21 16:17:47,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 119 transitions, 1140 flow [2024-06-21 16:17:47,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 119 transitions, 1079 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 16:17:47,135 INFO L231 Difference]: Finished difference. Result has 118 places, 95 transitions, 802 flow [2024-06-21 16:17:47,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=802, PETRI_PLACES=118, PETRI_TRANSITIONS=95} [2024-06-21 16:17:47,136 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 87 predicate places. [2024-06-21 16:17:47,137 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 95 transitions, 802 flow [2024-06-21 16:17:47,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:47,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:47,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:47,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:17:47,138 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)] === [2024-06-21 16:17:47,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:47,138 INFO L85 PathProgramCache]: Analyzing trace with hash -65974, now seen corresponding path program 4 times [2024-06-21 16:17:47,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:47,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858009024] [2024-06-21 16:17:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:47,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:47,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:47,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858009024] [2024-06-21 16:17:47,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858009024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:47,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:47,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:47,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411933677] [2024-06-21 16:17:47,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:47,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:47,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:47,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:47,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:47,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:47,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 95 transitions, 802 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:47,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:47,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:47,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:47,839 INFO L124 PetriNetUnfolderBase]: 359/628 cut-off events. [2024-06-21 16:17:47,839 INFO L125 PetriNetUnfolderBase]: For 22660/22660 co-relation queries the response was YES. [2024-06-21 16:17:47,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3784 conditions, 628 events. 359/628 cut-off events. For 22660/22660 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2530 event pairs, 69 based on Foata normal form. 1/628 useless extension candidates. Maximal degree in co-relation 3728. Up to 538 conditions per place. [2024-06-21 16:17:47,842 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 76 selfloop transitions, 32 changer transitions 0/110 dead transitions. [2024-06-21 16:17:47,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 110 transitions, 1136 flow [2024-06-21 16:17:47,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:47,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:47,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 16:17:47,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784722222222222 [2024-06-21 16:17:47,843 INFO L175 Difference]: Start difference. First operand has 118 places, 95 transitions, 802 flow. Second operand 9 states and 109 transitions. [2024-06-21 16:17:47,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 110 transitions, 1136 flow [2024-06-21 16:17:47,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 110 transitions, 1051 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 16:17:47,874 INFO L231 Difference]: Finished difference. Result has 119 places, 97 transitions, 806 flow [2024-06-21 16:17:47,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=806, PETRI_PLACES=119, PETRI_TRANSITIONS=97} [2024-06-21 16:17:47,875 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 88 predicate places. [2024-06-21 16:17:47,875 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 97 transitions, 806 flow [2024-06-21 16:17:47,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:47,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:47,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:47,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:17:47,875 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)] === [2024-06-21 16:17:47,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:47,875 INFO L85 PathProgramCache]: Analyzing trace with hash -65788, now seen corresponding path program 4 times [2024-06-21 16:17:47,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:47,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364362120] [2024-06-21 16:17:47,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:47,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:48,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:48,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364362120] [2024-06-21 16:17:48,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364362120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:48,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:48,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:48,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206072353] [2024-06-21 16:17:48,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:48,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:48,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:48,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:48,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:48,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:48,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 97 transitions, 806 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:48,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:48,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:48,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:48,768 INFO L124 PetriNetUnfolderBase]: 383/667 cut-off events. [2024-06-21 16:17:48,768 INFO L125 PetriNetUnfolderBase]: For 26972/26972 co-relation queries the response was YES. [2024-06-21 16:17:48,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3998 conditions, 667 events. 383/667 cut-off events. For 26972/26972 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2726 event pairs, 70 based on Foata normal form. 3/669 useless extension candidates. Maximal degree in co-relation 3941. Up to 410 conditions per place. [2024-06-21 16:17:48,772 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 82 selfloop transitions, 41 changer transitions 0/125 dead transitions. [2024-06-21 16:17:48,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 125 transitions, 1286 flow [2024-06-21 16:17:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:48,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:48,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-06-21 16:17:48,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2024-06-21 16:17:48,789 INFO L175 Difference]: Start difference. First operand has 119 places, 97 transitions, 806 flow. Second operand 9 states and 123 transitions. [2024-06-21 16:17:48,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 125 transitions, 1286 flow [2024-06-21 16:17:48,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 125 transitions, 1227 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 16:17:48,823 INFO L231 Difference]: Finished difference. Result has 122 places, 101 transitions, 866 flow [2024-06-21 16:17:48,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=866, PETRI_PLACES=122, PETRI_TRANSITIONS=101} [2024-06-21 16:17:48,823 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 91 predicate places. [2024-06-21 16:17:48,824 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 101 transitions, 866 flow [2024-06-21 16:17:48,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:48,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:48,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:48,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:17:48,824 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)] === [2024-06-21 16:17:48,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:48,824 INFO L85 PathProgramCache]: Analyzing trace with hash -150138298, now seen corresponding path program 5 times [2024-06-21 16:17:48,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:48,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128754259] [2024-06-21 16:17:48,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:48,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:49,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:49,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128754259] [2024-06-21 16:17:49,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128754259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:49,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:49,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:49,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135029958] [2024-06-21 16:17:49,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:49,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:49,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:49,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:49,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:49,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:49,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 101 transitions, 866 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:49,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:49,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:49,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:49,722 INFO L124 PetriNetUnfolderBase]: 392/682 cut-off events. [2024-06-21 16:17:49,722 INFO L125 PetriNetUnfolderBase]: For 28599/28599 co-relation queries the response was YES. [2024-06-21 16:17:49,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4164 conditions, 682 events. 392/682 cut-off events. For 28599/28599 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2813 event pairs, 76 based on Foata normal form. 3/684 useless extension candidates. Maximal degree in co-relation 4106. Up to 418 conditions per place. [2024-06-21 16:17:49,726 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 78 selfloop transitions, 45 changer transitions 0/125 dead transitions. [2024-06-21 16:17:49,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 125 transitions, 1332 flow [2024-06-21 16:17:49,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:49,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:49,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-06-21 16:17:49,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 16:17:49,727 INFO L175 Difference]: Start difference. First operand has 122 places, 101 transitions, 866 flow. Second operand 9 states and 120 transitions. [2024-06-21 16:17:49,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 125 transitions, 1332 flow [2024-06-21 16:17:49,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 125 transitions, 1267 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 16:17:49,763 INFO L231 Difference]: Finished difference. Result has 126 places, 103 transitions, 916 flow [2024-06-21 16:17:49,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=916, PETRI_PLACES=126, PETRI_TRANSITIONS=103} [2024-06-21 16:17:49,763 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 95 predicate places. [2024-06-21 16:17:49,763 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 103 transitions, 916 flow [2024-06-21 16:17:49,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:49,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:49,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:49,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:17:49,764 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)] === [2024-06-21 16:17:49,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:49,764 INFO L85 PathProgramCache]: Analyzing trace with hash -150368938, now seen corresponding path program 6 times [2024-06-21 16:17:49,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:49,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494156924] [2024-06-21 16:17:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:49,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:50,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:50,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494156924] [2024-06-21 16:17:50,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494156924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:50,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:50,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:50,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122018268] [2024-06-21 16:17:50,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:50,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:50,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:50,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:50,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:50,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:50,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 103 transitions, 916 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:50,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:50,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:50,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:50,624 INFO L124 PetriNetUnfolderBase]: 386/673 cut-off events. [2024-06-21 16:17:50,624 INFO L125 PetriNetUnfolderBase]: For 28242/28242 co-relation queries the response was YES. [2024-06-21 16:17:50,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4085 conditions, 673 events. 386/673 cut-off events. For 28242/28242 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2773 event pairs, 70 based on Foata normal form. 3/675 useless extension candidates. Maximal degree in co-relation 4026. Up to 414 conditions per place. [2024-06-21 16:17:50,629 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 82 selfloop transitions, 42 changer transitions 0/126 dead transitions. [2024-06-21 16:17:50,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 126 transitions, 1298 flow [2024-06-21 16:17:50,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-06-21 16:17:50,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2024-06-21 16:17:50,630 INFO L175 Difference]: Start difference. First operand has 126 places, 103 transitions, 916 flow. Second operand 9 states and 123 transitions. [2024-06-21 16:17:50,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 126 transitions, 1298 flow [2024-06-21 16:17:50,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 126 transitions, 1219 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:17:50,669 INFO L231 Difference]: Finished difference. Result has 129 places, 103 transitions, 926 flow [2024-06-21 16:17:50,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=926, PETRI_PLACES=129, PETRI_TRANSITIONS=103} [2024-06-21 16:17:50,669 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 98 predicate places. [2024-06-21 16:17:50,669 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 103 transitions, 926 flow [2024-06-21 16:17:50,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:50,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:50,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:50,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:17:50,670 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)] === [2024-06-21 16:17:50,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:50,670 INFO L85 PathProgramCache]: Analyzing trace with hash -606803572, now seen corresponding path program 7 times [2024-06-21 16:17:50,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:50,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931380053] [2024-06-21 16:17:50,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:50,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:51,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:51,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931380053] [2024-06-21 16:17:51,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931380053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:51,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:51,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:51,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684146273] [2024-06-21 16:17:51,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:51,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:51,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:51,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:51,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:51,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:51,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 103 transitions, 926 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:51,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:51,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:51,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:51,503 INFO L124 PetriNetUnfolderBase]: 410/712 cut-off events. [2024-06-21 16:17:51,503 INFO L125 PetriNetUnfolderBase]: For 32154/32154 co-relation queries the response was YES. [2024-06-21 16:17:51,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4385 conditions, 712 events. 410/712 cut-off events. For 32154/32154 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2977 event pairs, 68 based on Foata normal form. 3/714 useless extension candidates. Maximal degree in co-relation 4325. Up to 585 conditions per place. [2024-06-21 16:17:51,507 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 99 selfloop transitions, 25 changer transitions 0/126 dead transitions. [2024-06-21 16:17:51,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 126 transitions, 1418 flow [2024-06-21 16:17:51,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:51,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:51,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-21 16:17:51,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 16:17:51,508 INFO L175 Difference]: Start difference. First operand has 129 places, 103 transitions, 926 flow. Second operand 9 states and 112 transitions. [2024-06-21 16:17:51,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 126 transitions, 1418 flow [2024-06-21 16:17:51,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 126 transitions, 1300 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 16:17:51,547 INFO L231 Difference]: Finished difference. Result has 129 places, 107 transitions, 907 flow [2024-06-21 16:17:51,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=907, PETRI_PLACES=129, PETRI_TRANSITIONS=107} [2024-06-21 16:17:51,547 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 98 predicate places. [2024-06-21 16:17:51,547 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 107 transitions, 907 flow [2024-06-21 16:17:51,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:51,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:51,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:51,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:17:51,548 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:17:51,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:51,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1190026896, now seen corresponding path program 8 times [2024-06-21 16:17:51,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:51,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978876771] [2024-06-21 16:17:51,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:51,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:52,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:52,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978876771] [2024-06-21 16:17:52,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978876771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:52,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:52,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:52,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980081682] [2024-06-21 16:17:52,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:52,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:52,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:52,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:52,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:52,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:52,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 107 transitions, 907 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:52,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:52,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:52,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:52,357 INFO L124 PetriNetUnfolderBase]: 404/703 cut-off events. [2024-06-21 16:17:52,358 INFO L125 PetriNetUnfolderBase]: For 31273/31273 co-relation queries the response was YES. [2024-06-21 16:17:52,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4200 conditions, 703 events. 404/703 cut-off events. For 31273/31273 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2946 event pairs, 66 based on Foata normal form. 3/705 useless extension candidates. Maximal degree in co-relation 4139. Up to 581 conditions per place. [2024-06-21 16:17:52,361 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 96 selfloop transitions, 27 changer transitions 0/125 dead transitions. [2024-06-21 16:17:52,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 125 transitions, 1277 flow [2024-06-21 16:17:52,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:52,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-21 16:17:52,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3819444444444444 [2024-06-21 16:17:52,363 INFO L175 Difference]: Start difference. First operand has 129 places, 107 transitions, 907 flow. Second operand 9 states and 110 transitions. [2024-06-21 16:17:52,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 125 transitions, 1277 flow [2024-06-21 16:17:52,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 125 transitions, 1187 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 16:17:52,408 INFO L231 Difference]: Finished difference. Result has 131 places, 107 transitions, 876 flow [2024-06-21 16:17:52,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=876, PETRI_PLACES=131, PETRI_TRANSITIONS=107} [2024-06-21 16:17:52,409 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 100 predicate places. [2024-06-21 16:17:52,409 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 107 transitions, 876 flow [2024-06-21 16:17:52,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:52,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:52,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:52,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:17:52,410 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:17:52,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:52,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1485491864, now seen corresponding path program 1 times [2024-06-21 16:17:52,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:52,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758159876] [2024-06-21 16:17:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:52,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:53,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:53,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758159876] [2024-06-21 16:17:53,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758159876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:53,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:53,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:53,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516564687] [2024-06-21 16:17:53,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:53,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:53,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:53,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:53,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:53,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:53,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 107 transitions, 876 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:53,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:53,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:53,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:53,480 INFO L124 PetriNetUnfolderBase]: 400/697 cut-off events. [2024-06-21 16:17:53,481 INFO L125 PetriNetUnfolderBase]: For 30219/30219 co-relation queries the response was YES. [2024-06-21 16:17:53,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4123 conditions, 697 events. 400/697 cut-off events. For 30219/30219 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2898 event pairs, 74 based on Foata normal form. 2/698 useless extension candidates. Maximal degree in co-relation 4061. Up to 661 conditions per place. [2024-06-21 16:17:53,484 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 105 selfloop transitions, 14 changer transitions 0/121 dead transitions. [2024-06-21 16:17:53,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 121 transitions, 1160 flow [2024-06-21 16:17:53,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-21 16:17:53,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3472222222222222 [2024-06-21 16:17:53,485 INFO L175 Difference]: Start difference. First operand has 131 places, 107 transitions, 876 flow. Second operand 9 states and 100 transitions. [2024-06-21 16:17:53,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 121 transitions, 1160 flow [2024-06-21 16:17:53,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 121 transitions, 1082 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:17:53,534 INFO L231 Difference]: Finished difference. Result has 132 places, 109 transitions, 855 flow [2024-06-21 16:17:53,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=855, PETRI_PLACES=132, PETRI_TRANSITIONS=109} [2024-06-21 16:17:53,535 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 101 predicate places. [2024-06-21 16:17:53,535 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 109 transitions, 855 flow [2024-06-21 16:17:53,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:53,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:53,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:53,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:17:53,536 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:17:53,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:53,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1938970816, now seen corresponding path program 9 times [2024-06-21 16:17:53,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:53,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102719845] [2024-06-21 16:17:53,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:53,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:54,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:54,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102719845] [2024-06-21 16:17:54,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102719845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:54,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:54,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:54,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105380155] [2024-06-21 16:17:54,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:54,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:54,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:54,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:54,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:54,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:54,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 109 transitions, 855 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:54,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:54,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:54,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:54,367 INFO L124 PetriNetUnfolderBase]: 409/712 cut-off events. [2024-06-21 16:17:54,367 INFO L125 PetriNetUnfolderBase]: For 32208/32208 co-relation queries the response was YES. [2024-06-21 16:17:54,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4151 conditions, 712 events. 409/712 cut-off events. For 32208/32208 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2986 event pairs, 77 based on Foata normal form. 3/714 useless extension candidates. Maximal degree in co-relation 4088. Up to 583 conditions per place. [2024-06-21 16:17:54,371 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 101 selfloop transitions, 26 changer transitions 0/129 dead transitions. [2024-06-21 16:17:54,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 129 transitions, 1253 flow [2024-06-21 16:17:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:54,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:54,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-21 16:17:54,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 16:17:54,372 INFO L175 Difference]: Start difference. First operand has 132 places, 109 transitions, 855 flow. Second operand 9 states and 112 transitions. [2024-06-21 16:17:54,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 129 transitions, 1253 flow [2024-06-21 16:17:54,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 129 transitions, 1212 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 16:17:54,435 INFO L231 Difference]: Finished difference. Result has 134 places, 111 transitions, 887 flow [2024-06-21 16:17:54,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=887, PETRI_PLACES=134, PETRI_TRANSITIONS=111} [2024-06-21 16:17:54,436 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 103 predicate places. [2024-06-21 16:17:54,436 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 111 transitions, 887 flow [2024-06-21 16:17:54,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:54,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:54,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:54,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:17:54,437 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:17:54,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:54,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1938733480, now seen corresponding path program 5 times [2024-06-21 16:17:54,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:54,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322756770] [2024-06-21 16:17:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:54,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:54,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:54,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322756770] [2024-06-21 16:17:54,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322756770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:54,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:54,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:54,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74414226] [2024-06-21 16:17:54,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:54,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:54,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:54,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:54,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:55,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:55,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 111 transitions, 887 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:55,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:55,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:55,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:55,263 INFO L124 PetriNetUnfolderBase]: 407/709 cut-off events. [2024-06-21 16:17:55,263 INFO L125 PetriNetUnfolderBase]: For 31302/31302 co-relation queries the response was YES. [2024-06-21 16:17:55,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4168 conditions, 709 events. 407/709 cut-off events. For 31302/31302 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2960 event pairs, 85 based on Foata normal form. 1/709 useless extension candidates. Maximal degree in co-relation 4104. Up to 686 conditions per place. [2024-06-21 16:17:55,267 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 104 selfloop transitions, 14 changer transitions 0/120 dead transitions. [2024-06-21 16:17:55,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 120 transitions, 1143 flow [2024-06-21 16:17:55,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:55,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:55,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-21 16:17:55,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3368055555555556 [2024-06-21 16:17:55,270 INFO L175 Difference]: Start difference. First operand has 134 places, 111 transitions, 887 flow. Second operand 9 states and 97 transitions. [2024-06-21 16:17:55,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 120 transitions, 1143 flow [2024-06-21 16:17:55,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 120 transitions, 1092 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:17:55,339 INFO L231 Difference]: Finished difference. Result has 137 places, 111 transitions, 869 flow [2024-06-21 16:17:55,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=869, PETRI_PLACES=137, PETRI_TRANSITIONS=111} [2024-06-21 16:17:55,340 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 106 predicate places. [2024-06-21 16:17:55,340 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 111 transitions, 869 flow [2024-06-21 16:17:55,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:55,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:55,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:55,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:17:55,340 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:17:55,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:55,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1873278282, now seen corresponding path program 10 times [2024-06-21 16:17:55,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:55,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984321017] [2024-06-21 16:17:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:55,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:55,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:55,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984321017] [2024-06-21 16:17:55,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984321017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:55,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:55,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:55,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609659001] [2024-06-21 16:17:55,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:55,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:55,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:55,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:55,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:55,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:55,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 111 transitions, 869 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:55,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:55,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:55,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:56,170 INFO L124 PetriNetUnfolderBase]: 401/700 cut-off events. [2024-06-21 16:17:56,170 INFO L125 PetriNetUnfolderBase]: For 31766/31766 co-relation queries the response was YES. [2024-06-21 16:17:56,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3992 conditions, 700 events. 401/700 cut-off events. For 31766/31766 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2946 event pairs, 75 based on Foata normal form. 3/702 useless extension candidates. Maximal degree in co-relation 3927. Up to 651 conditions per place. [2024-06-21 16:17:56,175 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 110 selfloop transitions, 14 changer transitions 0/126 dead transitions. [2024-06-21 16:17:56,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 126 transitions, 1155 flow [2024-06-21 16:17:56,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:56,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:56,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-21 16:17:56,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3576388888888889 [2024-06-21 16:17:56,176 INFO L175 Difference]: Start difference. First operand has 137 places, 111 transitions, 869 flow. Second operand 9 states and 103 transitions. [2024-06-21 16:17:56,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 126 transitions, 1155 flow [2024-06-21 16:17:56,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 126 transitions, 1079 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 16:17:56,247 INFO L231 Difference]: Finished difference. Result has 136 places, 111 transitions, 826 flow [2024-06-21 16:17:56,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=826, PETRI_PLACES=136, PETRI_TRANSITIONS=111} [2024-06-21 16:17:56,247 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 105 predicate places. [2024-06-21 16:17:56,247 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 111 transitions, 826 flow [2024-06-21 16:17:56,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:56,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:56,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:56,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:17:56,248 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:17:56,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:56,249 INFO L85 PathProgramCache]: Analyzing trace with hash -201493863, now seen corresponding path program 1 times [2024-06-21 16:17:56,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:56,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290416047] [2024-06-21 16:17:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:56,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:57,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:57,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290416047] [2024-06-21 16:17:57,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290416047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:57,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:57,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:17:57,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019718292] [2024-06-21 16:17:57,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:57,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:17:57,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:57,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:17:57,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:17:57,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:57,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 111 transitions, 826 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:57,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:57,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:57,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:57,380 INFO L124 PetriNetUnfolderBase]: 404/705 cut-off events. [2024-06-21 16:17:57,381 INFO L125 PetriNetUnfolderBase]: For 31248/31248 co-relation queries the response was YES. [2024-06-21 16:17:57,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4035 conditions, 705 events. 404/705 cut-off events. For 31248/31248 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2958 event pairs, 82 based on Foata normal form. 1/705 useless extension candidates. Maximal degree in co-relation 3969. Up to 644 conditions per place. [2024-06-21 16:17:57,385 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 119 selfloop transitions, 18 changer transitions 0/139 dead transitions. [2024-06-21 16:17:57,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 139 transitions, 1182 flow [2024-06-21 16:17:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:17:57,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:17:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 16:17:57,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693181818181818 [2024-06-21 16:17:57,388 INFO L175 Difference]: Start difference. First operand has 136 places, 111 transitions, 826 flow. Second operand 11 states and 130 transitions. [2024-06-21 16:17:57,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 139 transitions, 1182 flow [2024-06-21 16:17:57,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 139 transitions, 1121 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 16:17:57,463 INFO L231 Difference]: Finished difference. Result has 137 places, 113 transitions, 829 flow [2024-06-21 16:17:57,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=829, PETRI_PLACES=137, PETRI_TRANSITIONS=113} [2024-06-21 16:17:57,467 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 106 predicate places. [2024-06-21 16:17:57,467 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 113 transitions, 829 flow [2024-06-21 16:17:57,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:57,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:57,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:57,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:17:57,468 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:17:57,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:57,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1201872942, now seen corresponding path program 1 times [2024-06-21 16:17:57,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:57,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434337814] [2024-06-21 16:17:57,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:57,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:58,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:58,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434337814] [2024-06-21 16:17:58,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434337814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:58,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:58,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:17:58,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269621320] [2024-06-21 16:17:58,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:58,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:17:58,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:58,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:17:58,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:17:58,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:58,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 113 transitions, 829 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:58,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:58,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:58,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:58,534 INFO L124 PetriNetUnfolderBase]: 413/720 cut-off events. [2024-06-21 16:17:58,534 INFO L125 PetriNetUnfolderBase]: For 34547/34547 co-relation queries the response was YES. [2024-06-21 16:17:58,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4133 conditions, 720 events. 413/720 cut-off events. For 34547/34547 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3049 event pairs, 85 based on Foata normal form. 3/722 useless extension candidates. Maximal degree in co-relation 4066. Up to 664 conditions per place. [2024-06-21 16:17:58,538 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 121 selfloop transitions, 16 changer transitions 0/139 dead transitions. [2024-06-21 16:17:58,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 139 transitions, 1185 flow [2024-06-21 16:17:58,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:17:58,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:17:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 16:17:58,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 16:17:58,542 INFO L175 Difference]: Start difference. First operand has 137 places, 113 transitions, 829 flow. Second operand 10 states and 120 transitions. [2024-06-21 16:17:58,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 139 transitions, 1185 flow [2024-06-21 16:17:58,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 139 transitions, 1139 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 16:17:58,619 INFO L231 Difference]: Finished difference. Result has 138 places, 115 transitions, 846 flow [2024-06-21 16:17:58,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=846, PETRI_PLACES=138, PETRI_TRANSITIONS=115} [2024-06-21 16:17:58,619 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 107 predicate places. [2024-06-21 16:17:58,619 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 115 transitions, 846 flow [2024-06-21 16:17:58,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:58,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:58,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:58,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:17:58,620 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:17:58,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:58,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1198148292, now seen corresponding path program 2 times [2024-06-21 16:17:58,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:58,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377100958] [2024-06-21 16:17:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:58,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:59,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:59,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377100958] [2024-06-21 16:17:59,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377100958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:59,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:59,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:17:59,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657586801] [2024-06-21 16:17:59,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:59,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:17:59,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:59,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:17:59,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:17:59,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:17:59,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 115 transitions, 846 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:59,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:59,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:17:59,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:59,585 INFO L124 PetriNetUnfolderBase]: 447/775 cut-off events. [2024-06-21 16:17:59,586 INFO L125 PetriNetUnfolderBase]: For 41766/41766 co-relation queries the response was YES. [2024-06-21 16:17:59,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4675 conditions, 775 events. 447/775 cut-off events. For 41766/41766 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3375 event pairs, 54 based on Foata normal form. 3/777 useless extension candidates. Maximal degree in co-relation 4607. Up to 368 conditions per place. [2024-06-21 16:17:59,590 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 89 selfloop transitions, 61 changer transitions 0/152 dead transitions. [2024-06-21 16:17:59,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 152 transitions, 1488 flow [2024-06-21 16:17:59,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:17:59,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:17:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 138 transitions. [2024-06-21 16:17:59,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 16:17:59,592 INFO L175 Difference]: Start difference. First operand has 138 places, 115 transitions, 846 flow. Second operand 10 states and 138 transitions. [2024-06-21 16:17:59,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 152 transitions, 1488 flow [2024-06-21 16:17:59,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 152 transitions, 1441 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 16:17:59,681 INFO L231 Difference]: Finished difference. Result has 140 places, 121 transitions, 1008 flow [2024-06-21 16:17:59,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1008, PETRI_PLACES=140, PETRI_TRANSITIONS=121} [2024-06-21 16:17:59,681 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 109 predicate places. [2024-06-21 16:17:59,681 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 121 transitions, 1008 flow [2024-06-21 16:17:59,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:59,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:59,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:59,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:17:59,682 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:17:59,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:59,682 INFO L85 PathProgramCache]: Analyzing trace with hash -565978157, now seen corresponding path program 2 times [2024-06-21 16:17:59,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:59,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577067156] [2024-06-21 16:17:59,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:59,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:00,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:00,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577067156] [2024-06-21 16:18:00,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577067156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:00,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:00,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:00,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685945274] [2024-06-21 16:18:00,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:00,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:00,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:00,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:00,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:00,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:00,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 121 transitions, 1008 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:00,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:00,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:00,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:00,706 INFO L124 PetriNetUnfolderBase]: 450/780 cut-off events. [2024-06-21 16:18:00,707 INFO L125 PetriNetUnfolderBase]: For 41835/41835 co-relation queries the response was YES. [2024-06-21 16:18:00,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4894 conditions, 780 events. 450/780 cut-off events. For 41835/41835 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3372 event pairs, 93 based on Foata normal form. 1/780 useless extension candidates. Maximal degree in co-relation 4825. Up to 688 conditions per place. [2024-06-21 16:18:00,711 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 103 selfloop transitions, 37 changer transitions 0/142 dead transitions. [2024-06-21 16:18:00,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 142 transitions, 1356 flow [2024-06-21 16:18:00,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:00,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:00,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 16:18:00,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2024-06-21 16:18:00,717 INFO L175 Difference]: Start difference. First operand has 140 places, 121 transitions, 1008 flow. Second operand 10 states and 121 transitions. [2024-06-21 16:18:00,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 142 transitions, 1356 flow [2024-06-21 16:18:00,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 142 transitions, 1276 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 16:18:00,826 INFO L231 Difference]: Finished difference. Result has 145 places, 123 transitions, 1033 flow [2024-06-21 16:18:00,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1033, PETRI_PLACES=145, PETRI_TRANSITIONS=123} [2024-06-21 16:18:00,827 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 114 predicate places. [2024-06-21 16:18:00,827 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 123 transitions, 1033 flow [2024-06-21 16:18:00,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:00,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:00,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:00,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 16:18:00,828 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:00,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:00,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1198153872, now seen corresponding path program 3 times [2024-06-21 16:18:00,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:00,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664817676] [2024-06-21 16:18:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:00,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:01,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:01,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664817676] [2024-06-21 16:18:01,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664817676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:01,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:01,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:01,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041466156] [2024-06-21 16:18:01,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:01,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:01,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:01,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:01,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:01,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:01,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 123 transitions, 1033 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:01,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:01,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:01,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:01,832 INFO L124 PetriNetUnfolderBase]: 444/771 cut-off events. [2024-06-21 16:18:01,832 INFO L125 PetriNetUnfolderBase]: For 42257/42257 co-relation queries the response was YES. [2024-06-21 16:18:01,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4765 conditions, 771 events. 444/771 cut-off events. For 42257/42257 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3352 event pairs, 52 based on Foata normal form. 3/773 useless extension candidates. Maximal degree in co-relation 4694. Up to 369 conditions per place. [2024-06-21 16:18:01,838 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 93 selfloop transitions, 60 changer transitions 0/155 dead transitions. [2024-06-21 16:18:01,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 155 transitions, 1519 flow [2024-06-21 16:18:01,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:01,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:01,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2024-06-21 16:18:01,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:18:01,839 INFO L175 Difference]: Start difference. First operand has 145 places, 123 transitions, 1033 flow. Second operand 10 states and 140 transitions. [2024-06-21 16:18:01,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 155 transitions, 1519 flow [2024-06-21 16:18:01,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 155 transitions, 1420 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 16:18:01,928 INFO L231 Difference]: Finished difference. Result has 147 places, 123 transitions, 1059 flow [2024-06-21 16:18:01,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1059, PETRI_PLACES=147, PETRI_TRANSITIONS=123} [2024-06-21 16:18:01,928 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 116 predicate places. [2024-06-21 16:18:01,929 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 123 transitions, 1059 flow [2024-06-21 16:18:01,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:01,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:01,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:01,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 16:18:01,929 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:01,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:01,930 INFO L85 PathProgramCache]: Analyzing trace with hash -195983458, now seen corresponding path program 4 times [2024-06-21 16:18:01,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:01,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996504097] [2024-06-21 16:18:01,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:01,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:02,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:02,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996504097] [2024-06-21 16:18:02,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996504097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:02,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:02,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:02,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446448633] [2024-06-21 16:18:02,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:02,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:02,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:02,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:02,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:02,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:02,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 123 transitions, 1059 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:02,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:02,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:02,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:02,898 INFO L124 PetriNetUnfolderBase]: 468/810 cut-off events. [2024-06-21 16:18:02,898 INFO L125 PetriNetUnfolderBase]: For 47856/47856 co-relation queries the response was YES. [2024-06-21 16:18:02,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5234 conditions, 810 events. 468/810 cut-off events. For 47856/47856 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3551 event pairs, 62 based on Foata normal form. 3/812 useless extension candidates. Maximal degree in co-relation 5162. Up to 389 conditions per place. [2024-06-21 16:18:02,903 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 97 selfloop transitions, 58 changer transitions 0/157 dead transitions. [2024-06-21 16:18:02,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 157 transitions, 1703 flow [2024-06-21 16:18:02,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:02,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 139 transitions. [2024-06-21 16:18:02,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 16:18:02,904 INFO L175 Difference]: Start difference. First operand has 147 places, 123 transitions, 1059 flow. Second operand 10 states and 139 transitions. [2024-06-21 16:18:02,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 157 transitions, 1703 flow [2024-06-21 16:18:02,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 157 transitions, 1563 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 16:18:02,988 INFO L231 Difference]: Finished difference. Result has 148 places, 127 transitions, 1100 flow [2024-06-21 16:18:02,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1100, PETRI_PLACES=148, PETRI_TRANSITIONS=127} [2024-06-21 16:18:02,989 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 117 predicate places. [2024-06-21 16:18:02,989 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 127 transitions, 1100 flow [2024-06-21 16:18:02,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:02,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:02,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:02,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 16:18:02,989 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:02,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:02,990 INFO L85 PathProgramCache]: Analyzing trace with hash -560615777, now seen corresponding path program 3 times [2024-06-21 16:18:02,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:02,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464539811] [2024-06-21 16:18:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:02,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:03,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:03,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464539811] [2024-06-21 16:18:03,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464539811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:03,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:03,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:03,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202918696] [2024-06-21 16:18:03,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:03,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:03,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:03,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:03,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:03,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:03,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 127 transitions, 1100 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:03,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:03,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:03,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:04,053 INFO L124 PetriNetUnfolderBase]: 471/815 cut-off events. [2024-06-21 16:18:04,053 INFO L125 PetriNetUnfolderBase]: For 47057/47057 co-relation queries the response was YES. [2024-06-21 16:18:04,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5266 conditions, 815 events. 471/815 cut-off events. For 47057/47057 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3561 event pairs, 101 based on Foata normal form. 1/815 useless extension candidates. Maximal degree in co-relation 5193. Up to 723 conditions per place. [2024-06-21 16:18:04,058 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 108 selfloop transitions, 35 changer transitions 0/145 dead transitions. [2024-06-21 16:18:04,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 145 transitions, 1450 flow [2024-06-21 16:18:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:04,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:04,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 16:18:04,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.371875 [2024-06-21 16:18:04,059 INFO L175 Difference]: Start difference. First operand has 148 places, 127 transitions, 1100 flow. Second operand 10 states and 119 transitions. [2024-06-21 16:18:04,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 145 transitions, 1450 flow [2024-06-21 16:18:04,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 145 transitions, 1350 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 16:18:04,169 INFO L231 Difference]: Finished difference. Result has 152 places, 129 transitions, 1105 flow [2024-06-21 16:18:04,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1000, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1105, PETRI_PLACES=152, PETRI_TRANSITIONS=129} [2024-06-21 16:18:04,170 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 121 predicate places. [2024-06-21 16:18:04,170 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 129 transitions, 1105 flow [2024-06-21 16:18:04,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:04,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:04,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:04,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 16:18:04,171 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:04,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:04,171 INFO L85 PathProgramCache]: Analyzing trace with hash -560408232, now seen corresponding path program 5 times [2024-06-21 16:18:04,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:04,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755971941] [2024-06-21 16:18:04,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:04,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:04,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:04,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755971941] [2024-06-21 16:18:04,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755971941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:04,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:04,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:04,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405562083] [2024-06-21 16:18:04,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:04,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:04,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:04,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:04,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:04,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:04,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 129 transitions, 1105 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:04,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:04,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:04,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:05,210 INFO L124 PetriNetUnfolderBase]: 480/830 cut-off events. [2024-06-21 16:18:05,211 INFO L125 PetriNetUnfolderBase]: For 51456/51456 co-relation queries the response was YES. [2024-06-21 16:18:05,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5310 conditions, 830 events. 480/830 cut-off events. For 51456/51456 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3662 event pairs, 74 based on Foata normal form. 3/832 useless extension candidates. Maximal degree in co-relation 5236. Up to 402 conditions per place. [2024-06-21 16:18:05,215 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 95 selfloop transitions, 62 changer transitions 0/159 dead transitions. [2024-06-21 16:18:05,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 159 transitions, 1721 flow [2024-06-21 16:18:05,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:05,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:05,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 136 transitions. [2024-06-21 16:18:05,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 16:18:05,217 INFO L175 Difference]: Start difference. First operand has 152 places, 129 transitions, 1105 flow. Second operand 10 states and 136 transitions. [2024-06-21 16:18:05,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 159 transitions, 1721 flow [2024-06-21 16:18:05,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 159 transitions, 1632 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 16:18:05,311 INFO L231 Difference]: Finished difference. Result has 154 places, 131 transitions, 1171 flow [2024-06-21 16:18:05,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1171, PETRI_PLACES=154, PETRI_TRANSITIONS=131} [2024-06-21 16:18:05,312 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 123 predicate places. [2024-06-21 16:18:05,312 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 131 transitions, 1171 flow [2024-06-21 16:18:05,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:05,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:05,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:05,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 16:18:05,313 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:05,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:05,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1418889926, now seen corresponding path program 6 times [2024-06-21 16:18:05,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:05,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501076665] [2024-06-21 16:18:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:05,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:05,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:05,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501076665] [2024-06-21 16:18:05,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501076665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:05,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:05,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:05,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093845075] [2024-06-21 16:18:05,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:05,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:05,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:05,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:05,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:05,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:05,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 131 transitions, 1171 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:05,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:05,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:05,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:06,248 INFO L124 PetriNetUnfolderBase]: 474/821 cut-off events. [2024-06-21 16:18:06,248 INFO L125 PetriNetUnfolderBase]: For 49570/49570 co-relation queries the response was YES. [2024-06-21 16:18:06,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5246 conditions, 821 events. 474/821 cut-off events. For 49570/49570 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3623 event pairs, 62 based on Foata normal form. 3/823 useless extension candidates. Maximal degree in co-relation 5171. Up to 398 conditions per place. [2024-06-21 16:18:06,253 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 99 selfloop transitions, 59 changer transitions 0/160 dead transitions. [2024-06-21 16:18:06,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 160 transitions, 1667 flow [2024-06-21 16:18:06,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:06,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:06,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 139 transitions. [2024-06-21 16:18:06,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 16:18:06,254 INFO L175 Difference]: Start difference. First operand has 154 places, 131 transitions, 1171 flow. Second operand 10 states and 139 transitions. [2024-06-21 16:18:06,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 160 transitions, 1667 flow [2024-06-21 16:18:06,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 160 transitions, 1534 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 16:18:06,377 INFO L231 Difference]: Finished difference. Result has 157 places, 131 transitions, 1161 flow [2024-06-21 16:18:06,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1161, PETRI_PLACES=157, PETRI_TRANSITIONS=131} [2024-06-21 16:18:06,377 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 126 predicate places. [2024-06-21 16:18:06,377 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 131 transitions, 1161 flow [2024-06-21 16:18:06,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:06,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:06,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:06,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 16:18:06,378 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:06,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:06,379 INFO L85 PathProgramCache]: Analyzing trace with hash -359041935, now seen corresponding path program 1 times [2024-06-21 16:18:06,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:06,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585121519] [2024-06-21 16:18:06,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:06,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:07,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:07,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585121519] [2024-06-21 16:18:07,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585121519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:07,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:07,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:07,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133351934] [2024-06-21 16:18:07,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:07,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:07,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:07,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:07,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:07,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 16:18:07,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 131 transitions, 1161 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:07,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:07,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 16:18:07,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:07,504 INFO L124 PetriNetUnfolderBase]: 423/754 cut-off events. [2024-06-21 16:18:07,504 INFO L125 PetriNetUnfolderBase]: For 52938/52946 co-relation queries the response was YES. [2024-06-21 16:18:07,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4977 conditions, 754 events. 423/754 cut-off events. For 52938/52946 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3400 event pairs, 66 based on Foata normal form. 6/747 useless extension candidates. Maximal degree in co-relation 4901. Up to 657 conditions per place. [2024-06-21 16:18:07,509 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 116 selfloop transitions, 20 changer transitions 0/150 dead transitions. [2024-06-21 16:18:07,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 150 transitions, 1495 flow [2024-06-21 16:18:07,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:18:07,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:18:07,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 16:18:07,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3993055555555556 [2024-06-21 16:18:07,510 INFO L175 Difference]: Start difference. First operand has 157 places, 131 transitions, 1161 flow. Second operand 9 states and 115 transitions. [2024-06-21 16:18:07,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 150 transitions, 1495 flow [2024-06-21 16:18:07,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 150 transitions, 1349 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 16:18:07,597 INFO L231 Difference]: Finished difference. Result has 157 places, 134 transitions, 1090 flow [2024-06-21 16:18:07,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1090, PETRI_PLACES=157, PETRI_TRANSITIONS=134} [2024-06-21 16:18:07,598 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 126 predicate places. [2024-06-21 16:18:07,598 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 134 transitions, 1090 flow [2024-06-21 16:18:07,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:07,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:07,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:07,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 16:18:07,599 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:07,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:07,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1306604148, now seen corresponding path program 7 times [2024-06-21 16:18:07,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:07,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264054149] [2024-06-21 16:18:07,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:07,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:08,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:08,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264054149] [2024-06-21 16:18:08,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264054149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:08,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:08,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:08,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989638063] [2024-06-21 16:18:08,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:08,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:08,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:08,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:08,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:08,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:08,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 134 transitions, 1090 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:08,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:08,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:08,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:08,514 INFO L124 PetriNetUnfolderBase]: 517/892 cut-off events. [2024-06-21 16:18:08,515 INFO L125 PetriNetUnfolderBase]: For 62335/62335 co-relation queries the response was YES. [2024-06-21 16:18:08,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5870 conditions, 892 events. 517/892 cut-off events. For 62335/62335 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4001 event pairs, 104 based on Foata normal form. 3/894 useless extension candidates. Maximal degree in co-relation 5792. Up to 438 conditions per place. [2024-06-21 16:18:08,521 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 103 selfloop transitions, 63 changer transitions 0/168 dead transitions. [2024-06-21 16:18:08,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 168 transitions, 1914 flow [2024-06-21 16:18:08,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:08,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2024-06-21 16:18:08,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:18:08,522 INFO L175 Difference]: Start difference. First operand has 157 places, 134 transitions, 1090 flow. Second operand 10 states and 140 transitions. [2024-06-21 16:18:08,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 168 transitions, 1914 flow [2024-06-21 16:18:08,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 168 transitions, 1868 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 16:18:08,631 INFO L231 Difference]: Finished difference. Result has 161 places, 140 transitions, 1259 flow [2024-06-21 16:18:08,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1259, PETRI_PLACES=161, PETRI_TRANSITIONS=140} [2024-06-21 16:18:08,632 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 130 predicate places. [2024-06-21 16:18:08,632 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 140 transitions, 1259 flow [2024-06-21 16:18:08,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:08,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:08,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:08,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 16:18:08,633 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:08,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:08,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1201089164, now seen corresponding path program 8 times [2024-06-21 16:18:08,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:08,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525137276] [2024-06-21 16:18:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:08,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:09,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:09,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525137276] [2024-06-21 16:18:09,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525137276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:09,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:09,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:09,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238709184] [2024-06-21 16:18:09,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:09,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:09,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:09,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:09,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:09,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:09,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 140 transitions, 1259 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:09,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:09,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:09,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:09,509 INFO L124 PetriNetUnfolderBase]: 511/883 cut-off events. [2024-06-21 16:18:09,509 INFO L125 PetriNetUnfolderBase]: For 60368/60368 co-relation queries the response was YES. [2024-06-21 16:18:09,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5830 conditions, 883 events. 511/883 cut-off events. For 60368/60368 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3962 event pairs, 102 based on Foata normal form. 3/885 useless extension candidates. Maximal degree in co-relation 5751. Up to 434 conditions per place. [2024-06-21 16:18:09,516 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 94 selfloop transitions, 69 changer transitions 0/165 dead transitions. [2024-06-21 16:18:09,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 165 transitions, 1879 flow [2024-06-21 16:18:09,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:09,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-06-21 16:18:09,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 16:18:09,517 INFO L175 Difference]: Start difference. First operand has 161 places, 140 transitions, 1259 flow. Second operand 10 states and 134 transitions. [2024-06-21 16:18:09,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 165 transitions, 1879 flow [2024-06-21 16:18:09,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 165 transitions, 1761 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 16:18:09,656 INFO L231 Difference]: Finished difference. Result has 166 places, 140 transitions, 1284 flow [2024-06-21 16:18:09,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1284, PETRI_PLACES=166, PETRI_TRANSITIONS=140} [2024-06-21 16:18:09,656 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 135 predicate places. [2024-06-21 16:18:09,656 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 140 transitions, 1284 flow [2024-06-21 16:18:09,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:09,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:09,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:09,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 16:18:09,657 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:09,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:09,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2044048, now seen corresponding path program 9 times [2024-06-21 16:18:09,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:09,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52898188] [2024-06-21 16:18:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:09,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:10,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:10,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52898188] [2024-06-21 16:18:10,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52898188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:10,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:10,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:10,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252979967] [2024-06-21 16:18:10,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:10,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:10,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:10,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:10,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:10,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:10,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 140 transitions, 1284 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:10,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:10,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:10,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:10,556 INFO L124 PetriNetUnfolderBase]: 520/898 cut-off events. [2024-06-21 16:18:10,556 INFO L125 PetriNetUnfolderBase]: For 62702/62702 co-relation queries the response was YES. [2024-06-21 16:18:10,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5925 conditions, 898 events. 520/898 cut-off events. For 62702/62702 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4030 event pairs, 92 based on Foata normal form. 3/900 useless extension candidates. Maximal degree in co-relation 5845. Up to 442 conditions per place. [2024-06-21 16:18:10,562 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 99 selfloop transitions, 68 changer transitions 0/169 dead transitions. [2024-06-21 16:18:10,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 169 transitions, 1956 flow [2024-06-21 16:18:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:10,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-06-21 16:18:10,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 16:18:10,563 INFO L175 Difference]: Start difference. First operand has 166 places, 140 transitions, 1284 flow. Second operand 10 states and 137 transitions. [2024-06-21 16:18:10,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 169 transitions, 1956 flow [2024-06-21 16:18:10,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 169 transitions, 1802 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 16:18:10,699 INFO L231 Difference]: Finished difference. Result has 167 places, 142 transitions, 1303 flow [2024-06-21 16:18:10,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1303, PETRI_PLACES=167, PETRI_TRANSITIONS=142} [2024-06-21 16:18:10,700 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 136 predicate places. [2024-06-21 16:18:10,700 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 142 transitions, 1303 flow [2024-06-21 16:18:10,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:10,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:10,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:10,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 16:18:10,701 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:10,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:10,701 INFO L85 PathProgramCache]: Analyzing trace with hash -366676367, now seen corresponding path program 4 times [2024-06-21 16:18:10,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:10,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132422955] [2024-06-21 16:18:10,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:10,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:11,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:11,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132422955] [2024-06-21 16:18:11,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132422955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:11,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:11,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:11,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852762565] [2024-06-21 16:18:11,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:11,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:11,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:11,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:11,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:11,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:11,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 142 transitions, 1303 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:11,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:11,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:11,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:11,757 INFO L124 PetriNetUnfolderBase]: 523/903 cut-off events. [2024-06-21 16:18:11,757 INFO L125 PetriNetUnfolderBase]: For 61540/61540 co-relation queries the response was YES. [2024-06-21 16:18:11,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6002 conditions, 903 events. 523/903 cut-off events. For 61540/61540 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4081 event pairs, 113 based on Foata normal form. 1/903 useless extension candidates. Maximal degree in co-relation 5921. Up to 811 conditions per place. [2024-06-21 16:18:11,763 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 121 selfloop transitions, 34 changer transitions 0/157 dead transitions. [2024-06-21 16:18:11,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 157 transitions, 1673 flow [2024-06-21 16:18:11,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:11,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:11,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 16:18:11,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.365625 [2024-06-21 16:18:11,764 INFO L175 Difference]: Start difference. First operand has 167 places, 142 transitions, 1303 flow. Second operand 10 states and 117 transitions. [2024-06-21 16:18:11,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 157 transitions, 1673 flow [2024-06-21 16:18:11,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 157 transitions, 1534 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 16:18:11,903 INFO L231 Difference]: Finished difference. Result has 170 places, 144 transitions, 1271 flow [2024-06-21 16:18:11,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1271, PETRI_PLACES=170, PETRI_TRANSITIONS=144} [2024-06-21 16:18:11,904 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 139 predicate places. [2024-06-21 16:18:11,904 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 144 transitions, 1271 flow [2024-06-21 16:18:11,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:11,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:11,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:11,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 16:18:11,905 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:11,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:11,905 INFO L85 PathProgramCache]: Analyzing trace with hash -366670632, now seen corresponding path program 10 times [2024-06-21 16:18:11,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:11,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509033507] [2024-06-21 16:18:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:11,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:12,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:12,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509033507] [2024-06-21 16:18:12,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509033507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:12,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:12,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:12,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013435959] [2024-06-21 16:18:12,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:12,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:12,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:12,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:12,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:12,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:12,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 144 transitions, 1271 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:12,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:12,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:12,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:12,676 INFO L124 PetriNetUnfolderBase]: 517/894 cut-off events. [2024-06-21 16:18:12,676 INFO L125 PetriNetUnfolderBase]: For 61546/61546 co-relation queries the response was YES. [2024-06-21 16:18:12,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5708 conditions, 894 events. 517/894 cut-off events. For 61546/61546 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4036 event pairs, 92 based on Foata normal form. 3/896 useless extension candidates. Maximal degree in co-relation 5626. Up to 443 conditions per place. [2024-06-21 16:18:12,682 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 102 selfloop transitions, 66 changer transitions 0/170 dead transitions. [2024-06-21 16:18:12,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 170 transitions, 1803 flow [2024-06-21 16:18:12,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:12,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:12,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-06-21 16:18:12,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 16:18:12,683 INFO L175 Difference]: Start difference. First operand has 170 places, 144 transitions, 1271 flow. Second operand 10 states and 137 transitions. [2024-06-21 16:18:12,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 170 transitions, 1803 flow [2024-06-21 16:18:12,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 170 transitions, 1698 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 16:18:12,832 INFO L231 Difference]: Finished difference. Result has 172 places, 144 transitions, 1303 flow [2024-06-21 16:18:12,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1166, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1303, PETRI_PLACES=172, PETRI_TRANSITIONS=144} [2024-06-21 16:18:12,835 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 141 predicate places. [2024-06-21 16:18:12,836 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 144 transitions, 1303 flow [2024-06-21 16:18:12,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:12,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:12,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:12,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 16:18:12,836 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:12,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:12,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1559468947, now seen corresponding path program 2 times [2024-06-21 16:18:12,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:12,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310586774] [2024-06-21 16:18:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:12,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:13,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:13,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310586774] [2024-06-21 16:18:13,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310586774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:13,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:13,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:13,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718593896] [2024-06-21 16:18:13,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:13,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:13,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:13,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:13,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:13,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 16:18:13,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 144 transitions, 1303 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:13,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:13,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 16:18:13,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:14,149 INFO L124 PetriNetUnfolderBase]: 466/827 cut-off events. [2024-06-21 16:18:14,149 INFO L125 PetriNetUnfolderBase]: For 66140/66148 co-relation queries the response was YES. [2024-06-21 16:18:14,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5557 conditions, 827 events. 466/827 cut-off events. For 66140/66148 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3824 event pairs, 76 based on Foata normal form. 6/820 useless extension candidates. Maximal degree in co-relation 5474. Up to 758 conditions per place. [2024-06-21 16:18:14,156 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 130 selfloop transitions, 13 changer transitions 0/157 dead transitions. [2024-06-21 16:18:14,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 157 transitions, 1627 flow [2024-06-21 16:18:14,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:18:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:18:14,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-21 16:18:14,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3715277777777778 [2024-06-21 16:18:14,157 INFO L175 Difference]: Start difference. First operand has 172 places, 144 transitions, 1303 flow. Second operand 9 states and 107 transitions. [2024-06-21 16:18:14,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 157 transitions, 1627 flow [2024-06-21 16:18:14,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 157 transitions, 1476 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 16:18:14,279 INFO L231 Difference]: Finished difference. Result has 171 places, 145 transitions, 1196 flow [2024-06-21 16:18:14,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1196, PETRI_PLACES=171, PETRI_TRANSITIONS=145} [2024-06-21 16:18:14,280 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 140 predicate places. [2024-06-21 16:18:14,280 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 145 transitions, 1196 flow [2024-06-21 16:18:14,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:14,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:14,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:14,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 16:18:14,281 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:14,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:14,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1763669118, now seen corresponding path program 11 times [2024-06-21 16:18:14,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:14,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850782690] [2024-06-21 16:18:14,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:14,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:14,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:14,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850782690] [2024-06-21 16:18:14,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850782690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:14,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:14,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:14,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519712782] [2024-06-21 16:18:14,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:14,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:14,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:14,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:14,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:15,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:15,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 145 transitions, 1196 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:15,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:15,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:15,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:15,304 INFO L124 PetriNetUnfolderBase]: 545/941 cut-off events. [2024-06-21 16:18:15,304 INFO L125 PetriNetUnfolderBase]: For 71219/71219 co-relation queries the response was YES. [2024-06-21 16:18:15,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6094 conditions, 941 events. 545/941 cut-off events. For 71219/71219 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4303 event pairs, 88 based on Foata normal form. 3/943 useless extension candidates. Maximal degree in co-relation 6010. Up to 757 conditions per place. [2024-06-21 16:18:15,310 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 138 selfloop transitions, 31 changer transitions 0/171 dead transitions. [2024-06-21 16:18:15,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 171 transitions, 1900 flow [2024-06-21 16:18:15,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:15,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 16:18:15,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-21 16:18:15,312 INFO L175 Difference]: Start difference. First operand has 171 places, 145 transitions, 1196 flow. Second operand 10 states and 125 transitions. [2024-06-21 16:18:15,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 171 transitions, 1900 flow [2024-06-21 16:18:15,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 171 transitions, 1866 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 16:18:15,453 INFO L231 Difference]: Finished difference. Result has 174 places, 149 transitions, 1289 flow [2024-06-21 16:18:15,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1162, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1289, PETRI_PLACES=174, PETRI_TRANSITIONS=149} [2024-06-21 16:18:15,454 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 143 predicate places. [2024-06-21 16:18:15,454 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 149 transitions, 1289 flow [2024-06-21 16:18:15,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:15,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:15,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:15,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 16:18:15,454 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:15,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:15,455 INFO L85 PathProgramCache]: Analyzing trace with hash -136450335, now seen corresponding path program 3 times [2024-06-21 16:18:15,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:15,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361969190] [2024-06-21 16:18:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:15,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:16,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:16,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361969190] [2024-06-21 16:18:16,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361969190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:16,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:16,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:16,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823402700] [2024-06-21 16:18:16,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:16,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:16,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:16,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:16,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:16,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 16:18:16,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 149 transitions, 1289 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:16,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:16,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 16:18:16,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:16,744 INFO L124 PetriNetUnfolderBase]: 494/878 cut-off events. [2024-06-21 16:18:16,745 INFO L125 PetriNetUnfolderBase]: For 76013/76017 co-relation queries the response was YES. [2024-06-21 16:18:16,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5944 conditions, 878 events. 494/878 cut-off events. For 76013/76017 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4191 event pairs, 86 based on Foata normal form. 6/875 useless extension candidates. Maximal degree in co-relation 5859. Up to 810 conditions per place. [2024-06-21 16:18:16,751 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 136 selfloop transitions, 13 changer transitions 0/163 dead transitions. [2024-06-21 16:18:16,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 163 transitions, 1641 flow [2024-06-21 16:18:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:18:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:18:16,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 16:18:16,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3680555555555556 [2024-06-21 16:18:16,752 INFO L175 Difference]: Start difference. First operand has 174 places, 149 transitions, 1289 flow. Second operand 9 states and 106 transitions. [2024-06-21 16:18:16,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 163 transitions, 1641 flow [2024-06-21 16:18:16,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 163 transitions, 1518 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 16:18:16,880 INFO L231 Difference]: Finished difference. Result has 176 places, 152 transitions, 1233 flow [2024-06-21 16:18:16,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1233, PETRI_PLACES=176, PETRI_TRANSITIONS=152} [2024-06-21 16:18:16,880 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 145 predicate places. [2024-06-21 16:18:16,880 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 152 transitions, 1233 flow [2024-06-21 16:18:16,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:16,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:16,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:16,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 16:18:16,881 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:16,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:16,881 INFO L85 PathProgramCache]: Analyzing trace with hash 377042545, now seen corresponding path program 5 times [2024-06-21 16:18:16,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:16,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441993088] [2024-06-21 16:18:16,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:16,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:17,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:17,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441993088] [2024-06-21 16:18:17,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441993088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:17,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:17,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:17,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711050349] [2024-06-21 16:18:17,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:17,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:17,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:17,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:17,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:17,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:17,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 152 transitions, 1233 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:17,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:17,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:17,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:17,866 INFO L124 PetriNetUnfolderBase]: 547/946 cut-off events. [2024-06-21 16:18:17,867 INFO L125 PetriNetUnfolderBase]: For 70060/70060 co-relation queries the response was YES. [2024-06-21 16:18:17,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6146 conditions, 946 events. 547/946 cut-off events. For 70060/70060 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4359 event pairs, 109 based on Foata normal form. 1/946 useless extension candidates. Maximal degree in co-relation 6059. Up to 920 conditions per place. [2024-06-21 16:18:17,875 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 146 selfloop transitions, 16 changer transitions 0/164 dead transitions. [2024-06-21 16:18:17,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 164 transitions, 1613 flow [2024-06-21 16:18:17,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:17,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:17,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-21 16:18:17,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33125 [2024-06-21 16:18:17,877 INFO L175 Difference]: Start difference. First operand has 176 places, 152 transitions, 1233 flow. Second operand 10 states and 106 transitions. [2024-06-21 16:18:17,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 164 transitions, 1613 flow [2024-06-21 16:18:18,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 164 transitions, 1575 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:18:18,027 INFO L231 Difference]: Finished difference. Result has 180 places, 154 transitions, 1270 flow [2024-06-21 16:18:18,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1270, PETRI_PLACES=180, PETRI_TRANSITIONS=154} [2024-06-21 16:18:18,028 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 149 predicate places. [2024-06-21 16:18:18,028 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 154 transitions, 1270 flow [2024-06-21 16:18:18,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:18,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:18,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:18,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 16:18:18,029 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:18,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:18,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1194391543, now seen corresponding path program 1 times [2024-06-21 16:18:18,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:18,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058677805] [2024-06-21 16:18:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:18,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:18,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:18,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058677805] [2024-06-21 16:18:18,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058677805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:18,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:18,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:18,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608607134] [2024-06-21 16:18:18,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:18,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:18,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:18,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:18,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:18,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:18,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 154 transitions, 1270 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:18,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:18,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:18,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:19,217 INFO L124 PetriNetUnfolderBase]: 554/958 cut-off events. [2024-06-21 16:18:19,218 INFO L125 PetriNetUnfolderBase]: For 72272/72272 co-relation queries the response was YES. [2024-06-21 16:18:19,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6176 conditions, 958 events. 554/958 cut-off events. For 72272/72272 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4417 event pairs, 98 based on Foata normal form. 2/959 useless extension candidates. Maximal degree in co-relation 6088. Up to 919 conditions per place. [2024-06-21 16:18:19,224 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 157 selfloop transitions, 16 changer transitions 0/175 dead transitions. [2024-06-21 16:18:19,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 175 transitions, 1696 flow [2024-06-21 16:18:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:19,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-21 16:18:19,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.340625 [2024-06-21 16:18:19,225 INFO L175 Difference]: Start difference. First operand has 180 places, 154 transitions, 1270 flow. Second operand 10 states and 109 transitions. [2024-06-21 16:18:19,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 175 transitions, 1696 flow [2024-06-21 16:18:19,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 175 transitions, 1637 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 16:18:19,376 INFO L231 Difference]: Finished difference. Result has 185 places, 162 transitions, 1325 flow [2024-06-21 16:18:19,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1325, PETRI_PLACES=185, PETRI_TRANSITIONS=162} [2024-06-21 16:18:19,377 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 154 predicate places. [2024-06-21 16:18:19,377 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 162 transitions, 1325 flow [2024-06-21 16:18:19,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:19,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:19,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:19,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 16:18:19,377 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:19,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:19,378 INFO L85 PathProgramCache]: Analyzing trace with hash 642103945, now seen corresponding path program 4 times [2024-06-21 16:18:19,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:19,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108212917] [2024-06-21 16:18:19,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:19,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:20,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:20,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108212917] [2024-06-21 16:18:20,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108212917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:20,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:20,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:20,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346316092] [2024-06-21 16:18:20,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:20,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:20,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:20,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:20,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:20,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 16:18:20,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 162 transitions, 1325 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:20,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:20,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 16:18:20,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:20,604 INFO L124 PetriNetUnfolderBase]: 502/892 cut-off events. [2024-06-21 16:18:20,605 INFO L125 PetriNetUnfolderBase]: For 78827/78833 co-relation queries the response was YES. [2024-06-21 16:18:20,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6057 conditions, 892 events. 502/892 cut-off events. For 78827/78833 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4271 event pairs, 80 based on Foata normal form. 6/887 useless extension candidates. Maximal degree in co-relation 5965. Up to 819 conditions per place. [2024-06-21 16:18:20,611 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 145 selfloop transitions, 15 changer transitions 0/175 dead transitions. [2024-06-21 16:18:20,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 175 transitions, 1694 flow [2024-06-21 16:18:20,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:20,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:20,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 16:18:20,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.353125 [2024-06-21 16:18:20,612 INFO L175 Difference]: Start difference. First operand has 185 places, 162 transitions, 1325 flow. Second operand 10 states and 113 transitions. [2024-06-21 16:18:20,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 175 transitions, 1694 flow [2024-06-21 16:18:20,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 175 transitions, 1652 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 16:18:20,778 INFO L231 Difference]: Finished difference. Result has 191 places, 165 transitions, 1351 flow [2024-06-21 16:18:20,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1285, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1351, PETRI_PLACES=191, PETRI_TRANSITIONS=165} [2024-06-21 16:18:20,778 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 160 predicate places. [2024-06-21 16:18:20,779 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 165 transitions, 1351 flow [2024-06-21 16:18:20,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:20,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:20,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:20,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 16:18:20,779 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:20,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:20,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1508357900, now seen corresponding path program 12 times [2024-06-21 16:18:20,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:20,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114593953] [2024-06-21 16:18:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:20,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:21,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:21,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114593953] [2024-06-21 16:18:21,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114593953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:21,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:21,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:21,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96933014] [2024-06-21 16:18:21,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:21,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:21,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:21,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:21,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:21,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:21,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 165 transitions, 1351 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:21,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:21,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:21,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:21,592 INFO L124 PetriNetUnfolderBase]: 567/981 cut-off events. [2024-06-21 16:18:21,592 INFO L125 PetriNetUnfolderBase]: For 78992/78992 co-relation queries the response was YES. [2024-06-21 16:18:21,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6493 conditions, 981 events. 567/981 cut-off events. For 78992/78992 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4581 event pairs, 103 based on Foata normal form. 3/983 useless extension candidates. Maximal degree in co-relation 6399. Up to 919 conditions per place. [2024-06-21 16:18:21,599 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 163 selfloop transitions, 18 changer transitions 0/183 dead transitions. [2024-06-21 16:18:21,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 183 transitions, 1801 flow [2024-06-21 16:18:21,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:21,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:21,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-21 16:18:21,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35625 [2024-06-21 16:18:21,601 INFO L175 Difference]: Start difference. First operand has 191 places, 165 transitions, 1351 flow. Second operand 10 states and 114 transitions. [2024-06-21 16:18:21,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 183 transitions, 1801 flow [2024-06-21 16:18:21,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 183 transitions, 1761 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 16:18:21,786 INFO L231 Difference]: Finished difference. Result has 194 places, 167 transitions, 1384 flow [2024-06-21 16:18:21,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1384, PETRI_PLACES=194, PETRI_TRANSITIONS=167} [2024-06-21 16:18:21,786 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 163 predicate places. [2024-06-21 16:18:21,786 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 167 transitions, 1384 flow [2024-06-21 16:18:21,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:21,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:21,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:21,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 16:18:21,787 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:21,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:21,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1980344954, now seen corresponding path program 13 times [2024-06-21 16:18:21,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:21,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611213410] [2024-06-21 16:18:21,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:21,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:22,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:22,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611213410] [2024-06-21 16:18:22,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611213410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:22,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:22,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:22,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622264524] [2024-06-21 16:18:22,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:22,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:22,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:22,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:22,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:22,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:22,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 167 transitions, 1384 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:22,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:22,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:22,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:22,571 INFO L124 PetriNetUnfolderBase]: 576/996 cut-off events. [2024-06-21 16:18:22,571 INFO L125 PetriNetUnfolderBase]: For 81458/81458 co-relation queries the response was YES. [2024-06-21 16:18:22,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6616 conditions, 996 events. 576/996 cut-off events. For 81458/81458 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4676 event pairs, 79 based on Foata normal form. 3/998 useless extension candidates. Maximal degree in co-relation 6521. Up to 798 conditions per place. [2024-06-21 16:18:22,578 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 145 selfloop transitions, 42 changer transitions 0/189 dead transitions. [2024-06-21 16:18:22,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 189 transitions, 1998 flow [2024-06-21 16:18:22,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 16:18:22,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-21 16:18:22,579 INFO L175 Difference]: Start difference. First operand has 194 places, 167 transitions, 1384 flow. Second operand 10 states and 122 transitions. [2024-06-21 16:18:22,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 189 transitions, 1998 flow [2024-06-21 16:18:22,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 189 transitions, 1947 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 16:18:22,786 INFO L231 Difference]: Finished difference. Result has 196 places, 169 transitions, 1448 flow [2024-06-21 16:18:22,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1448, PETRI_PLACES=196, PETRI_TRANSITIONS=169} [2024-06-21 16:18:22,787 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 165 predicate places. [2024-06-21 16:18:22,787 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 169 transitions, 1448 flow [2024-06-21 16:18:22,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:22,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:22,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:22,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 16:18:22,788 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:22,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:22,788 INFO L85 PathProgramCache]: Analyzing trace with hash -28797538, now seen corresponding path program 14 times [2024-06-21 16:18:22,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:22,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842463192] [2024-06-21 16:18:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:22,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:23,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:23,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842463192] [2024-06-21 16:18:23,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842463192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:23,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:23,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:23,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690064531] [2024-06-21 16:18:23,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:23,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:23,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:23,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:23,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:23,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:23,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 169 transitions, 1448 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:23,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:23,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:23,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:23,593 INFO L124 PetriNetUnfolderBase]: 570/987 cut-off events. [2024-06-21 16:18:23,593 INFO L125 PetriNetUnfolderBase]: For 77078/77078 co-relation queries the response was YES. [2024-06-21 16:18:23,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6482 conditions, 987 events. 570/987 cut-off events. For 77078/77078 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4625 event pairs, 79 based on Foata normal form. 3/989 useless extension candidates. Maximal degree in co-relation 6386. Up to 794 conditions per place. [2024-06-21 16:18:23,601 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 148 selfloop transitions, 39 changer transitions 0/189 dead transitions. [2024-06-21 16:18:23,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 189 transitions, 2038 flow [2024-06-21 16:18:23,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:23,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:23,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 16:18:23,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-21 16:18:23,602 INFO L175 Difference]: Start difference. First operand has 196 places, 169 transitions, 1448 flow. Second operand 10 states and 123 transitions. [2024-06-21 16:18:23,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 189 transitions, 2038 flow [2024-06-21 16:18:23,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 189 transitions, 1889 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 16:18:23,782 INFO L231 Difference]: Finished difference. Result has 198 places, 169 transitions, 1382 flow [2024-06-21 16:18:23,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1382, PETRI_PLACES=198, PETRI_TRANSITIONS=169} [2024-06-21 16:18:23,782 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 167 predicate places. [2024-06-21 16:18:23,782 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 169 transitions, 1382 flow [2024-06-21 16:18:23,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:23,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:23,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:23,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 16:18:23,783 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:23,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:23,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1756519278, now seen corresponding path program 15 times [2024-06-21 16:18:23,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:23,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328571415] [2024-06-21 16:18:23,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:23,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:24,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:24,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:24,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328571415] [2024-06-21 16:18:24,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328571415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:24,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:24,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:24,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396207874] [2024-06-21 16:18:24,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:24,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:24,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:24,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:24,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:24,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:24,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 169 transitions, 1382 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:24,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:24,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:24,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:24,782 INFO L124 PetriNetUnfolderBase]: 564/978 cut-off events. [2024-06-21 16:18:24,782 INFO L125 PetriNetUnfolderBase]: For 72241/72241 co-relation queries the response was YES. [2024-06-21 16:18:24,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6172 conditions, 978 events. 564/978 cut-off events. For 72241/72241 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4575 event pairs, 99 based on Foata normal form. 3/980 useless extension candidates. Maximal degree in co-relation 6075. Up to 790 conditions per place. [2024-06-21 16:18:24,790 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 151 selfloop transitions, 35 changer transitions 0/188 dead transitions. [2024-06-21 16:18:24,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 188 transitions, 1834 flow [2024-06-21 16:18:24,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:24,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:24,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 16:18:24,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 16:18:24,791 INFO L175 Difference]: Start difference. First operand has 198 places, 169 transitions, 1382 flow. Second operand 10 states and 124 transitions. [2024-06-21 16:18:24,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 188 transitions, 1834 flow [2024-06-21 16:18:24,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 188 transitions, 1751 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 16:18:24,963 INFO L231 Difference]: Finished difference. Result has 200 places, 169 transitions, 1374 flow [2024-06-21 16:18:24,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1374, PETRI_PLACES=200, PETRI_TRANSITIONS=169} [2024-06-21 16:18:24,963 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 169 predicate places. [2024-06-21 16:18:24,963 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 169 transitions, 1374 flow [2024-06-21 16:18:24,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:24,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:24,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:24,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 16:18:24,964 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:24,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:24,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1987979231, now seen corresponding path program 5 times [2024-06-21 16:18:24,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:24,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730279755] [2024-06-21 16:18:24,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:24,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:25,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:25,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730279755] [2024-06-21 16:18:25,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730279755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:25,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:25,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:18:25,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96418660] [2024-06-21 16:18:25,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:25,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:18:25,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:25,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:18:25,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:18:26,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 16:18:26,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 169 transitions, 1374 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:26,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:26,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 16:18:26,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:26,359 INFO L124 PetriNetUnfolderBase]: 505/895 cut-off events. [2024-06-21 16:18:26,359 INFO L125 PetriNetUnfolderBase]: For 72989/73000 co-relation queries the response was YES. [2024-06-21 16:18:26,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5689 conditions, 895 events. 505/895 cut-off events. For 72989/73000 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4303 event pairs, 78 based on Foata normal form. 7/889 useless extension candidates. Maximal degree in co-relation 5591. Up to 810 conditions per place. [2024-06-21 16:18:26,366 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 146 selfloop transitions, 21 changer transitions 0/182 dead transitions. [2024-06-21 16:18:26,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 182 transitions, 1754 flow [2024-06-21 16:18:26,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:18:26,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:18:26,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 16:18:26,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854166666666667 [2024-06-21 16:18:26,367 INFO L175 Difference]: Start difference. First operand has 200 places, 169 transitions, 1374 flow. Second operand 9 states and 111 transitions. [2024-06-21 16:18:26,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 182 transitions, 1754 flow [2024-06-21 16:18:26,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 182 transitions, 1631 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 16:18:26,517 INFO L231 Difference]: Finished difference. Result has 199 places, 171 transitions, 1320 flow [2024-06-21 16:18:26,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1320, PETRI_PLACES=199, PETRI_TRANSITIONS=171} [2024-06-21 16:18:26,518 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 168 predicate places. [2024-06-21 16:18:26,518 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 171 transitions, 1320 flow [2024-06-21 16:18:26,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:26,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:26,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:26,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 16:18:26,518 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:26,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:26,519 INFO L85 PathProgramCache]: Analyzing trace with hash 757972849, now seen corresponding path program 1 times [2024-06-21 16:18:26,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:26,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233180943] [2024-06-21 16:18:26,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:26,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:27,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:27,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233180943] [2024-06-21 16:18:27,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233180943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:27,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:27,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:27,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627383139] [2024-06-21 16:18:27,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:27,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:27,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:27,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:27,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:27,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:27,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 171 transitions, 1320 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:27,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:27,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:27,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:27,991 INFO L124 PetriNetUnfolderBase]: 572/994 cut-off events. [2024-06-21 16:18:27,991 INFO L125 PetriNetUnfolderBase]: For 74491/74491 co-relation queries the response was YES. [2024-06-21 16:18:27,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 994 events. 572/994 cut-off events. For 74491/74491 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4697 event pairs, 84 based on Foata normal form. 2/995 useless extension candidates. Maximal degree in co-relation 6200. Up to 898 conditions per place. [2024-06-21 16:18:27,999 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 179 selfloop transitions, 21 changer transitions 0/202 dead transitions. [2024-06-21 16:18:27,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 202 transitions, 1988 flow [2024-06-21 16:18:28,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:18:28,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:18:28,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 16:18:28,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3671875 [2024-06-21 16:18:28,000 INFO L175 Difference]: Start difference. First operand has 199 places, 171 transitions, 1320 flow. Second operand 12 states and 141 transitions. [2024-06-21 16:18:28,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 202 transitions, 1988 flow [2024-06-21 16:18:28,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 202 transitions, 1905 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 16:18:28,217 INFO L231 Difference]: Finished difference. Result has 204 places, 173 transitions, 1333 flow [2024-06-21 16:18:28,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1333, PETRI_PLACES=204, PETRI_TRANSITIONS=173} [2024-06-21 16:18:28,218 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 173 predicate places. [2024-06-21 16:18:28,218 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 173 transitions, 1333 flow [2024-06-21 16:18:28,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:28,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:28,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:28,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 16:18:28,219 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:28,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:28,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1319818199, now seen corresponding path program 1 times [2024-06-21 16:18:28,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:28,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200186869] [2024-06-21 16:18:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:28,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:29,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:29,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200186869] [2024-06-21 16:18:29,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200186869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:29,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:29,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:29,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704090712] [2024-06-21 16:18:29,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:29,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:29,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:29,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:29,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:29,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:29,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 173 transitions, 1333 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:29,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:29,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:29,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:29,470 INFO L124 PetriNetUnfolderBase]: 583/1012 cut-off events. [2024-06-21 16:18:29,470 INFO L125 PetriNetUnfolderBase]: For 76413/76413 co-relation queries the response was YES. [2024-06-21 16:18:29,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6468 conditions, 1012 events. 583/1012 cut-off events. For 76413/76413 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4795 event pairs, 100 based on Foata normal form. 1/1012 useless extension candidates. Maximal degree in co-relation 6367. Up to 938 conditions per place. [2024-06-21 16:18:29,477 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 181 selfloop transitions, 25 changer transitions 0/208 dead transitions. [2024-06-21 16:18:29,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 208 transitions, 2038 flow [2024-06-21 16:18:29,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:18:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:18:29,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-06-21 16:18:29,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3723958333333333 [2024-06-21 16:18:29,485 INFO L175 Difference]: Start difference. First operand has 204 places, 173 transitions, 1333 flow. Second operand 12 states and 143 transitions. [2024-06-21 16:18:29,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 208 transitions, 2038 flow [2024-06-21 16:18:29,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 208 transitions, 1954 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-21 16:18:29,706 INFO L231 Difference]: Finished difference. Result has 208 places, 181 transitions, 1394 flow [2024-06-21 16:18:29,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1394, PETRI_PLACES=208, PETRI_TRANSITIONS=181} [2024-06-21 16:18:29,707 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 177 predicate places. [2024-06-21 16:18:29,707 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 181 transitions, 1394 flow [2024-06-21 16:18:29,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:29,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:29,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:29,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 16:18:29,708 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:29,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:29,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1393446673, now seen corresponding path program 2 times [2024-06-21 16:18:29,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:29,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28540057] [2024-06-21 16:18:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:29,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:30,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:30,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28540057] [2024-06-21 16:18:30,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28540057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:30,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:30,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:30,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774954615] [2024-06-21 16:18:30,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:30,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:30,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:30,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:30,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:30,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:30,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 181 transitions, 1394 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:30,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:30,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:30,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:31,224 INFO L124 PetriNetUnfolderBase]: 580/1007 cut-off events. [2024-06-21 16:18:31,224 INFO L125 PetriNetUnfolderBase]: For 76723/76723 co-relation queries the response was YES. [2024-06-21 16:18:31,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6329 conditions, 1007 events. 580/1007 cut-off events. For 76723/76723 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4764 event pairs, 99 based on Foata normal form. 2/1008 useless extension candidates. Maximal degree in co-relation 6226. Up to 937 conditions per place. [2024-06-21 16:18:31,231 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 184 selfloop transitions, 22 changer transitions 0/208 dead transitions. [2024-06-21 16:18:31,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 208 transitions, 1882 flow [2024-06-21 16:18:31,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:18:31,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:18:31,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 16:18:31,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619791666666667 [2024-06-21 16:18:31,232 INFO L175 Difference]: Start difference. First operand has 208 places, 181 transitions, 1394 flow. Second operand 12 states and 139 transitions. [2024-06-21 16:18:31,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 208 transitions, 1882 flow [2024-06-21 16:18:31,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 208 transitions, 1813 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 16:18:31,442 INFO L231 Difference]: Finished difference. Result has 214 places, 181 transitions, 1374 flow [2024-06-21 16:18:31,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1374, PETRI_PLACES=214, PETRI_TRANSITIONS=181} [2024-06-21 16:18:31,442 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 183 predicate places. [2024-06-21 16:18:31,442 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 181 transitions, 1374 flow [2024-06-21 16:18:31,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:31,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:31,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:31,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 16:18:31,443 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:31,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:31,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1317021689, now seen corresponding path program 2 times [2024-06-21 16:18:31,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:31,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486384490] [2024-06-21 16:18:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:31,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:32,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:32,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486384490] [2024-06-21 16:18:32,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486384490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:32,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:32,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:32,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900156113] [2024-06-21 16:18:32,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:32,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:32,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:32,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:32,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:32,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:32,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 181 transitions, 1374 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:32,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:32,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:32,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:32,788 INFO L124 PetriNetUnfolderBase]: 584/1014 cut-off events. [2024-06-21 16:18:32,789 INFO L125 PetriNetUnfolderBase]: For 78663/78663 co-relation queries the response was YES. [2024-06-21 16:18:32,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6311 conditions, 1014 events. 584/1014 cut-off events. For 78663/78663 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4813 event pairs, 99 based on Foata normal form. 3/1016 useless extension candidates. Maximal degree in co-relation 6206. Up to 942 conditions per place. [2024-06-21 16:18:32,797 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 182 selfloop transitions, 24 changer transitions 0/208 dead transitions. [2024-06-21 16:18:32,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 208 transitions, 1892 flow [2024-06-21 16:18:32,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:18:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:18:32,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-21 16:18:32,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3645833333333333 [2024-06-21 16:18:32,798 INFO L175 Difference]: Start difference. First operand has 214 places, 181 transitions, 1374 flow. Second operand 12 states and 140 transitions. [2024-06-21 16:18:32,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 208 transitions, 1892 flow [2024-06-21 16:18:33,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 208 transitions, 1838 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 16:18:33,009 INFO L231 Difference]: Finished difference. Result has 215 places, 183 transitions, 1415 flow [2024-06-21 16:18:33,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1415, PETRI_PLACES=215, PETRI_TRANSITIONS=183} [2024-06-21 16:18:33,010 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 184 predicate places. [2024-06-21 16:18:33,010 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 183 transitions, 1415 flow [2024-06-21 16:18:33,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:33,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:33,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:33,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 16:18:33,011 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:33,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:33,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1201552889, now seen corresponding path program 3 times [2024-06-21 16:18:33,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:33,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920817277] [2024-06-21 16:18:33,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:33,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:33,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:33,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920817277] [2024-06-21 16:18:33,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920817277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:33,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:33,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:33,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277587803] [2024-06-21 16:18:33,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:33,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:33,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:33,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:33,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:33,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:33,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 183 transitions, 1415 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:33,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:33,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:33,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:34,278 INFO L124 PetriNetUnfolderBase]: 593/1029 cut-off events. [2024-06-21 16:18:34,278 INFO L125 PetriNetUnfolderBase]: For 81024/81024 co-relation queries the response was YES. [2024-06-21 16:18:34,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6476 conditions, 1029 events. 593/1029 cut-off events. For 81024/81024 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 4938 event pairs, 53 based on Foata normal form. 3/1031 useless extension candidates. Maximal degree in co-relation 6370. Up to 544 conditions per place. [2024-06-21 16:18:34,287 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 122 selfloop transitions, 91 changer transitions 0/215 dead transitions. [2024-06-21 16:18:34,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 215 transitions, 2015 flow [2024-06-21 16:18:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:18:34,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:18:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 147 transitions. [2024-06-21 16:18:34,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-21 16:18:34,288 INFO L175 Difference]: Start difference. First operand has 215 places, 183 transitions, 1415 flow. Second operand 11 states and 147 transitions. [2024-06-21 16:18:34,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 215 transitions, 2015 flow [2024-06-21 16:18:34,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 215 transitions, 1934 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-21 16:18:34,513 INFO L231 Difference]: Finished difference. Result has 215 places, 186 transitions, 1578 flow [2024-06-21 16:18:34,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1578, PETRI_PLACES=215, PETRI_TRANSITIONS=186} [2024-06-21 16:18:34,514 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 184 predicate places. [2024-06-21 16:18:34,514 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 186 transitions, 1578 flow [2024-06-21 16:18:34,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:34,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:34,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:34,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 16:18:34,515 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:34,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:34,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1201730519, now seen corresponding path program 4 times [2024-06-21 16:18:34,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:34,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284480391] [2024-06-21 16:18:34,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:34,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:35,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:35,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284480391] [2024-06-21 16:18:35,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284480391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:35,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:35,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:35,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855983586] [2024-06-21 16:18:35,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:35,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:35,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:35,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:35,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:35,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:35,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 186 transitions, 1578 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:35,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:35,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:35,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:35,581 INFO L124 PetriNetUnfolderBase]: 602/1044 cut-off events. [2024-06-21 16:18:35,582 INFO L125 PetriNetUnfolderBase]: For 83742/83742 co-relation queries the response was YES. [2024-06-21 16:18:35,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6908 conditions, 1044 events. 602/1044 cut-off events. For 83742/83742 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5021 event pairs, 53 based on Foata normal form. 3/1046 useless extension candidates. Maximal degree in co-relation 6802. Up to 543 conditions per place. [2024-06-21 16:18:35,590 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 125 selfloop transitions, 95 changer transitions 0/222 dead transitions. [2024-06-21 16:18:35,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 222 transitions, 2230 flow [2024-06-21 16:18:35,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:18:35,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:18:35,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 162 transitions. [2024-06-21 16:18:35,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 16:18:35,591 INFO L175 Difference]: Start difference. First operand has 215 places, 186 transitions, 1578 flow. Second operand 12 states and 162 transitions. [2024-06-21 16:18:35,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 222 transitions, 2230 flow [2024-06-21 16:18:35,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 222 transitions, 2008 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 16:18:35,845 INFO L231 Difference]: Finished difference. Result has 218 places, 189 transitions, 1615 flow [2024-06-21 16:18:35,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1615, PETRI_PLACES=218, PETRI_TRANSITIONS=189} [2024-06-21 16:18:35,845 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 187 predicate places. [2024-06-21 16:18:35,846 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 189 transitions, 1615 flow [2024-06-21 16:18:35,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:35,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:35,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:35,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 16:18:35,846 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:35,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:35,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1201730643, now seen corresponding path program 3 times [2024-06-21 16:18:35,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:35,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399325961] [2024-06-21 16:18:35,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:35,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:36,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:36,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399325961] [2024-06-21 16:18:36,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399325961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:36,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:36,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:36,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493055836] [2024-06-21 16:18:36,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:36,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:36,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:36,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:36,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:36,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:36,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 189 transitions, 1615 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:36,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:36,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:36,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:36,905 INFO L124 PetriNetUnfolderBase]: 606/1052 cut-off events. [2024-06-21 16:18:36,905 INFO L125 PetriNetUnfolderBase]: For 83358/83358 co-relation queries the response was YES. [2024-06-21 16:18:36,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7046 conditions, 1052 events. 606/1052 cut-off events. For 83358/83358 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5059 event pairs, 108 based on Foata normal form. 2/1053 useless extension candidates. Maximal degree in co-relation 6939. Up to 954 conditions per place. [2024-06-21 16:18:36,914 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 169 selfloop transitions, 39 changer transitions 0/210 dead transitions. [2024-06-21 16:18:36,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 210 transitions, 2109 flow [2024-06-21 16:18:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:18:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:18:36,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 16:18:36,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693181818181818 [2024-06-21 16:18:36,916 INFO L175 Difference]: Start difference. First operand has 218 places, 189 transitions, 1615 flow. Second operand 11 states and 130 transitions. [2024-06-21 16:18:36,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 210 transitions, 2109 flow [2024-06-21 16:18:37,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 210 transitions, 1874 flow, removed 25 selfloop flow, removed 10 redundant places. [2024-06-21 16:18:37,201 INFO L231 Difference]: Finished difference. Result has 219 places, 190 transitions, 1488 flow [2024-06-21 16:18:37,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1380, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1488, PETRI_PLACES=219, PETRI_TRANSITIONS=190} [2024-06-21 16:18:37,201 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 188 predicate places. [2024-06-21 16:18:37,201 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 190 transitions, 1488 flow [2024-06-21 16:18:37,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:37,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:37,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:37,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 16:18:37,202 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:37,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:37,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1029657645, now seen corresponding path program 5 times [2024-06-21 16:18:37,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:37,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51128263] [2024-06-21 16:18:37,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:37,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:37,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:37,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51128263] [2024-06-21 16:18:37,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51128263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:37,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:37,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:37,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280742924] [2024-06-21 16:18:37,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:37,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:37,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:37,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:37,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:37,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:37,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 190 transitions, 1488 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:37,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:37,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:37,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:38,306 INFO L124 PetriNetUnfolderBase]: 615/1067 cut-off events. [2024-06-21 16:18:38,307 INFO L125 PetriNetUnfolderBase]: For 88303/88303 co-relation queries the response was YES. [2024-06-21 16:18:38,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6923 conditions, 1067 events. 615/1067 cut-off events. For 88303/88303 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5156 event pairs, 81 based on Foata normal form. 3/1069 useless extension candidates. Maximal degree in co-relation 6815. Up to 582 conditions per place. [2024-06-21 16:18:38,315 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 131 selfloop transitions, 86 changer transitions 0/219 dead transitions. [2024-06-21 16:18:38,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 219 transitions, 2114 flow [2024-06-21 16:18:38,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:18:38,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:18:38,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-06-21 16:18:38,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-21 16:18:38,317 INFO L175 Difference]: Start difference. First operand has 219 places, 190 transitions, 1488 flow. Second operand 11 states and 145 transitions. [2024-06-21 16:18:38,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 219 transitions, 2114 flow [2024-06-21 16:18:38,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 219 transitions, 2016 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 16:18:38,567 INFO L231 Difference]: Finished difference. Result has 221 places, 193 transitions, 1636 flow [2024-06-21 16:18:38,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1636, PETRI_PLACES=221, PETRI_TRANSITIONS=193} [2024-06-21 16:18:38,568 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 190 predicate places. [2024-06-21 16:18:38,568 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 193 transitions, 1636 flow [2024-06-21 16:18:38,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:38,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:38,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:38,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 16:18:38,569 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:38,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:38,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1222624149, now seen corresponding path program 6 times [2024-06-21 16:18:38,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:38,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536183853] [2024-06-21 16:18:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:38,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:39,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:39,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536183853] [2024-06-21 16:18:39,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536183853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:39,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:39,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:39,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640779146] [2024-06-21 16:18:39,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:39,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:39,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:39,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:39,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:39,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:39,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 193 transitions, 1636 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:39,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:39,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:39,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:39,632 INFO L124 PetriNetUnfolderBase]: 624/1082 cut-off events. [2024-06-21 16:18:39,633 INFO L125 PetriNetUnfolderBase]: For 91349/91349 co-relation queries the response was YES. [2024-06-21 16:18:39,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7320 conditions, 1082 events. 624/1082 cut-off events. For 91349/91349 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5265 event pairs, 85 based on Foata normal form. 3/1084 useless extension candidates. Maximal degree in co-relation 7211. Up to 597 conditions per place. [2024-06-21 16:18:39,642 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 138 selfloop transitions, 84 changer transitions 0/224 dead transitions. [2024-06-21 16:18:39,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 224 transitions, 2308 flow [2024-06-21 16:18:39,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:18:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:18:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 148 transitions. [2024-06-21 16:18:39,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-21 16:18:39,643 INFO L175 Difference]: Start difference. First operand has 221 places, 193 transitions, 1636 flow. Second operand 11 states and 148 transitions. [2024-06-21 16:18:39,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 224 transitions, 2308 flow [2024-06-21 16:18:39,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 224 transitions, 2084 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-21 16:18:39,875 INFO L231 Difference]: Finished difference. Result has 223 places, 196 transitions, 1660 flow [2024-06-21 16:18:39,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1660, PETRI_PLACES=223, PETRI_TRANSITIONS=196} [2024-06-21 16:18:39,875 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 192 predicate places. [2024-06-21 16:18:39,876 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 196 transitions, 1660 flow [2024-06-21 16:18:39,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:39,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:39,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:39,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 16:18:39,876 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:39,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:39,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1029411381, now seen corresponding path program 1 times [2024-06-21 16:18:39,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:39,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408856024] [2024-06-21 16:18:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:39,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:40,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:40,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408856024] [2024-06-21 16:18:40,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408856024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:40,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:40,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:40,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124243270] [2024-06-21 16:18:40,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:40,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:40,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:40,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:40,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:40,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:40,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 196 transitions, 1660 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:40,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:40,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:40,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:41,200 INFO L124 PetriNetUnfolderBase]: 628/1090 cut-off events. [2024-06-21 16:18:41,200 INFO L125 PetriNetUnfolderBase]: For 90545/90545 co-relation queries the response was YES. [2024-06-21 16:18:41,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7398 conditions, 1090 events. 628/1090 cut-off events. For 90545/90545 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5314 event pairs, 68 based on Foata normal form. 2/1091 useless extension candidates. Maximal degree in co-relation 7288. Up to 927 conditions per place. [2024-06-21 16:18:41,210 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 172 selfloop transitions, 45 changer transitions 0/219 dead transitions. [2024-06-21 16:18:41,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 219 transitions, 2207 flow [2024-06-21 16:18:41,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:41,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:41,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 16:18:41,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 16:18:41,211 INFO L175 Difference]: Start difference. First operand has 223 places, 196 transitions, 1660 flow. Second operand 10 states and 124 transitions. [2024-06-21 16:18:41,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 219 transitions, 2207 flow [2024-06-21 16:18:41,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 219 transitions, 1979 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-21 16:18:41,476 INFO L231 Difference]: Finished difference. Result has 225 places, 199 transitions, 1572 flow [2024-06-21 16:18:41,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1572, PETRI_PLACES=225, PETRI_TRANSITIONS=199} [2024-06-21 16:18:41,476 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 194 predicate places. [2024-06-21 16:18:41,477 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 199 transitions, 1572 flow [2024-06-21 16:18:41,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:41,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:41,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:41,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 16:18:41,477 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:41,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:41,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1677748737, now seen corresponding path program 7 times [2024-06-21 16:18:41,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:41,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503323701] [2024-06-21 16:18:41,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:41,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:42,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:42,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503323701] [2024-06-21 16:18:42,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503323701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:42,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:42,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:42,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078664230] [2024-06-21 16:18:42,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:42,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:42,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:42,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:42,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:42,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:42,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 199 transitions, 1572 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:42,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:42,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:42,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:42,543 INFO L124 PetriNetUnfolderBase]: 637/1105 cut-off events. [2024-06-21 16:18:42,544 INFO L125 PetriNetUnfolderBase]: For 96476/96476 co-relation queries the response was YES. [2024-06-21 16:18:42,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7433 conditions, 1105 events. 637/1105 cut-off events. For 96476/96476 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5425 event pairs, 77 based on Foata normal form. 3/1107 useless extension candidates. Maximal degree in co-relation 7321. Up to 620 conditions per place. [2024-06-21 16:18:42,553 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 144 selfloop transitions, 84 changer transitions 0/230 dead transitions. [2024-06-21 16:18:42,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 230 transitions, 2284 flow [2024-06-21 16:18:42,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:18:42,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:18:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 149 transitions. [2024-06-21 16:18:42,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-21 16:18:42,554 INFO L175 Difference]: Start difference. First operand has 225 places, 199 transitions, 1572 flow. Second operand 11 states and 149 transitions. [2024-06-21 16:18:42,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 230 transitions, 2284 flow [2024-06-21 16:18:42,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 230 transitions, 2172 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 16:18:42,827 INFO L231 Difference]: Finished difference. Result has 229 places, 202 transitions, 1716 flow [2024-06-21 16:18:42,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1716, PETRI_PLACES=229, PETRI_TRANSITIONS=202} [2024-06-21 16:18:42,827 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 198 predicate places. [2024-06-21 16:18:42,828 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 202 transitions, 1716 flow [2024-06-21 16:18:42,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:42,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:42,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:42,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 16:18:42,828 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:42,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:42,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1036091385, now seen corresponding path program 8 times [2024-06-21 16:18:42,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:42,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061859421] [2024-06-21 16:18:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:42,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:43,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:43,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:43,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061859421] [2024-06-21 16:18:43,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061859421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:43,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:43,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:43,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168572621] [2024-06-21 16:18:43,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:43,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:43,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:43,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:43,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:43,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:43,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 202 transitions, 1716 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:43,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:43,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:43,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:43,928 INFO L124 PetriNetUnfolderBase]: 640/1110 cut-off events. [2024-06-21 16:18:43,928 INFO L125 PetriNetUnfolderBase]: For 93121/93121 co-relation queries the response was YES. [2024-06-21 16:18:43,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7713 conditions, 1110 events. 640/1110 cut-off events. For 93121/93121 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5453 event pairs, 85 based on Foata normal form. 1/1110 useless extension candidates. Maximal degree in co-relation 7600. Up to 597 conditions per place. [2024-06-21 16:18:43,937 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 137 selfloop transitions, 95 changer transitions 0/234 dead transitions. [2024-06-21 16:18:43,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 234 transitions, 2428 flow [2024-06-21 16:18:43,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:18:43,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:18:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 160 transitions. [2024-06-21 16:18:43,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 16:18:43,939 INFO L175 Difference]: Start difference. First operand has 229 places, 202 transitions, 1716 flow. Second operand 12 states and 160 transitions. [2024-06-21 16:18:43,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 234 transitions, 2428 flow [2024-06-21 16:18:44,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 234 transitions, 2194 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-21 16:18:44,242 INFO L231 Difference]: Finished difference. Result has 232 places, 204 transitions, 1737 flow [2024-06-21 16:18:44,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1737, PETRI_PLACES=232, PETRI_TRANSITIONS=204} [2024-06-21 16:18:44,242 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 201 predicate places. [2024-06-21 16:18:44,243 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 204 transitions, 1737 flow [2024-06-21 16:18:44,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:44,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:44,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:44,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 16:18:44,243 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:44,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:44,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1036091509, now seen corresponding path program 4 times [2024-06-21 16:18:44,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:44,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033867067] [2024-06-21 16:18:44,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:44,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:45,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:45,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033867067] [2024-06-21 16:18:45,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033867067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:45,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:45,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:45,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381604103] [2024-06-21 16:18:45,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:45,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:45,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:45,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:45,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:45,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:45,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 204 transitions, 1737 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:45,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:45,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:45,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:45,632 INFO L124 PetriNetUnfolderBase]: 644/1118 cut-off events. [2024-06-21 16:18:45,632 INFO L125 PetriNetUnfolderBase]: For 98985/98985 co-relation queries the response was YES. [2024-06-21 16:18:45,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7822 conditions, 1118 events. 644/1118 cut-off events. For 98985/98985 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 5484 event pairs, 110 based on Foata normal form. 2/1119 useless extension candidates. Maximal degree in co-relation 7708. Up to 1020 conditions per place. [2024-06-21 16:18:45,642 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 183 selfloop transitions, 37 changer transitions 0/222 dead transitions. [2024-06-21 16:18:45,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 222 transitions, 2247 flow [2024-06-21 16:18:45,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:18:45,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:18:45,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 16:18:45,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 16:18:45,643 INFO L175 Difference]: Start difference. First operand has 232 places, 204 transitions, 1737 flow. Second operand 11 states and 128 transitions. [2024-06-21 16:18:45,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 222 transitions, 2247 flow [2024-06-21 16:18:45,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 222 transitions, 2020 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-21 16:18:45,922 INFO L231 Difference]: Finished difference. Result has 233 places, 205 transitions, 1616 flow [2024-06-21 16:18:45,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1510, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1616, PETRI_PLACES=233, PETRI_TRANSITIONS=205} [2024-06-21 16:18:45,923 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 202 predicate places. [2024-06-21 16:18:45,923 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 205 transitions, 1616 flow [2024-06-21 16:18:45,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:45,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:45,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:45,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 16:18:45,924 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:45,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:45,924 INFO L85 PathProgramCache]: Analyzing trace with hash 501205619, now seen corresponding path program 2 times [2024-06-21 16:18:45,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:45,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913692034] [2024-06-21 16:18:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:45,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:46,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:46,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913692034] [2024-06-21 16:18:46,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913692034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:46,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:46,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:46,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782003279] [2024-06-21 16:18:46,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:46,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:46,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:46,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:46,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:47,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:47,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 205 transitions, 1616 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:47,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:47,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:47,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:47,433 INFO L124 PetriNetUnfolderBase]: 648/1126 cut-off events. [2024-06-21 16:18:47,433 INFO L125 PetriNetUnfolderBase]: For 100928/100928 co-relation queries the response was YES. [2024-06-21 16:18:47,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7659 conditions, 1126 events. 648/1126 cut-off events. For 100928/100928 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5537 event pairs, 74 based on Foata normal form. 2/1127 useless extension candidates. Maximal degree in co-relation 7544. Up to 963 conditions per place. [2024-06-21 16:18:47,443 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 185 selfloop transitions, 40 changer transitions 0/227 dead transitions. [2024-06-21 16:18:47,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 227 transitions, 2211 flow [2024-06-21 16:18:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 16:18:47,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-21 16:18:47,445 INFO L175 Difference]: Start difference. First operand has 233 places, 205 transitions, 1616 flow. Second operand 10 states and 125 transitions. [2024-06-21 16:18:47,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 227 transitions, 2211 flow [2024-06-21 16:18:47,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 227 transitions, 2115 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 16:18:47,816 INFO L231 Difference]: Finished difference. Result has 235 places, 208 transitions, 1656 flow [2024-06-21 16:18:47,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1656, PETRI_PLACES=235, PETRI_TRANSITIONS=208} [2024-06-21 16:18:47,817 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 204 predicate places. [2024-06-21 16:18:47,817 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 208 transitions, 1656 flow [2024-06-21 16:18:47,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:47,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:47,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:47,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 16:18:47,818 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:47,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:47,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1754592571, now seen corresponding path program 3 times [2024-06-21 16:18:47,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:47,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279378152] [2024-06-21 16:18:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:47,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:48,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:48,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279378152] [2024-06-21 16:18:48,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279378152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:48,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:48,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:48,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584708002] [2024-06-21 16:18:48,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:48,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:48,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:48,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:48,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:48,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:48,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 208 transitions, 1656 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:48,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:48,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:48,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:49,062 INFO L124 PetriNetUnfolderBase]: 658/1144 cut-off events. [2024-06-21 16:18:49,062 INFO L125 PetriNetUnfolderBase]: For 103798/103798 co-relation queries the response was YES. [2024-06-21 16:18:49,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7835 conditions, 1144 events. 658/1144 cut-off events. For 103798/103798 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 5675 event pairs, 77 based on Foata normal form. 2/1145 useless extension candidates. Maximal degree in co-relation 7718. Up to 994 conditions per place. [2024-06-21 16:18:49,071 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 186 selfloop transitions, 42 changer transitions 0/230 dead transitions. [2024-06-21 16:18:49,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 230 transitions, 2253 flow [2024-06-21 16:18:49,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:49,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:49,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 16:18:49,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2024-06-21 16:18:49,072 INFO L175 Difference]: Start difference. First operand has 235 places, 208 transitions, 1656 flow. Second operand 10 states and 121 transitions. [2024-06-21 16:18:49,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 230 transitions, 2253 flow [2024-06-21 16:18:49,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 230 transitions, 2137 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 16:18:49,379 INFO L231 Difference]: Finished difference. Result has 239 places, 213 transitions, 1711 flow [2024-06-21 16:18:49,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1711, PETRI_PLACES=239, PETRI_TRANSITIONS=213} [2024-06-21 16:18:49,379 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 208 predicate places. [2024-06-21 16:18:49,379 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 213 transitions, 1711 flow [2024-06-21 16:18:49,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:49,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:49,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:49,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 16:18:49,380 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:49,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:49,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1524369397, now seen corresponding path program 9 times [2024-06-21 16:18:49,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:49,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014674582] [2024-06-21 16:18:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:49,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:49,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:49,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014674582] [2024-06-21 16:18:49,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014674582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:49,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:49,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:49,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053287339] [2024-06-21 16:18:49,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:49,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:49,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:49,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:49,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:50,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:50,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 213 transitions, 1711 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:50,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:50,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:50,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:50,414 INFO L124 PetriNetUnfolderBase]: 667/1159 cut-off events. [2024-06-21 16:18:50,414 INFO L125 PetriNetUnfolderBase]: For 111165/111165 co-relation queries the response was YES. [2024-06-21 16:18:50,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8078 conditions, 1159 events. 667/1159 cut-off events. For 111165/111165 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 5751 event pairs, 85 based on Foata normal form. 3/1161 useless extension candidates. Maximal degree in co-relation 7959. Up to 666 conditions per place. [2024-06-21 16:18:50,424 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 160 selfloop transitions, 80 changer transitions 0/242 dead transitions. [2024-06-21 16:18:50,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 242 transitions, 2521 flow [2024-06-21 16:18:50,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:18:50,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:18:50,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 148 transitions. [2024-06-21 16:18:50,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-21 16:18:50,425 INFO L175 Difference]: Start difference. First operand has 239 places, 213 transitions, 1711 flow. Second operand 11 states and 148 transitions. [2024-06-21 16:18:50,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 242 transitions, 2521 flow [2024-06-21 16:18:50,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 242 transitions, 2384 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 16:18:50,718 INFO L231 Difference]: Finished difference. Result has 245 places, 216 transitions, 1872 flow [2024-06-21 16:18:50,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1872, PETRI_PLACES=245, PETRI_TRANSITIONS=216} [2024-06-21 16:18:50,718 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 214 predicate places. [2024-06-21 16:18:50,718 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 216 transitions, 1872 flow [2024-06-21 16:18:50,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:50,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:50,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:50,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 16:18:50,719 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:50,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:50,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1518113287, now seen corresponding path program 10 times [2024-06-21 16:18:50,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:50,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278130630] [2024-06-21 16:18:50,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:50,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:51,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:51,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278130630] [2024-06-21 16:18:51,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278130630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:51,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:51,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:51,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393437513] [2024-06-21 16:18:51,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:51,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:51,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:51,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:51,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:51,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:51,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 216 transitions, 1872 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:51,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:51,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:51,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:51,800 INFO L124 PetriNetUnfolderBase]: 676/1174 cut-off events. [2024-06-21 16:18:51,801 INFO L125 PetriNetUnfolderBase]: For 112927/112927 co-relation queries the response was YES. [2024-06-21 16:18:51,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8287 conditions, 1174 events. 676/1174 cut-off events. For 112927/112927 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 5869 event pairs, 83 based on Foata normal form. 3/1176 useless extension candidates. Maximal degree in co-relation 8167. Up to 681 conditions per place. [2024-06-21 16:18:51,809 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 159 selfloop transitions, 83 changer transitions 0/244 dead transitions. [2024-06-21 16:18:51,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 244 transitions, 2636 flow [2024-06-21 16:18:51,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:18:51,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:18:51,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 147 transitions. [2024-06-21 16:18:51,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-21 16:18:51,810 INFO L175 Difference]: Start difference. First operand has 245 places, 216 transitions, 1872 flow. Second operand 11 states and 147 transitions. [2024-06-21 16:18:51,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 244 transitions, 2636 flow [2024-06-21 16:18:52,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 244 transitions, 2402 flow, removed 39 selfloop flow, removed 9 redundant places. [2024-06-21 16:18:52,116 INFO L231 Difference]: Finished difference. Result has 247 places, 219 transitions, 1906 flow [2024-06-21 16:18:52,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1638, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1906, PETRI_PLACES=247, PETRI_TRANSITIONS=219} [2024-06-21 16:18:52,116 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 216 predicate places. [2024-06-21 16:18:52,116 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 219 transitions, 1906 flow [2024-06-21 16:18:52,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:52,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:52,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:52,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 16:18:52,117 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:52,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:52,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1746014437, now seen corresponding path program 11 times [2024-06-21 16:18:52,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:52,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388267744] [2024-06-21 16:18:52,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:52,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:52,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:52,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388267744] [2024-06-21 16:18:52,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388267744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:52,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:52,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:52,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427899779] [2024-06-21 16:18:52,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:52,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:52,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:52,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:52,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:53,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:53,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 219 transitions, 1906 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:53,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:53,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:53,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:53,375 INFO L124 PetriNetUnfolderBase]: 685/1189 cut-off events. [2024-06-21 16:18:53,375 INFO L125 PetriNetUnfolderBase]: For 116241/116241 co-relation queries the response was YES. [2024-06-21 16:18:53,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8485 conditions, 1189 events. 685/1189 cut-off events. For 116241/116241 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 5951 event pairs, 87 based on Foata normal form. 3/1191 useless extension candidates. Maximal degree in co-relation 8364. Up to 696 conditions per place. [2024-06-21 16:18:53,385 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 156 selfloop transitions, 87 changer transitions 0/245 dead transitions. [2024-06-21 16:18:53,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 245 transitions, 2656 flow [2024-06-21 16:18:53,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:18:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:18:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-21 16:18:53,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 16:18:53,386 INFO L175 Difference]: Start difference. First operand has 247 places, 219 transitions, 1906 flow. Second operand 11 states and 143 transitions. [2024-06-21 16:18:53,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 245 transitions, 2656 flow [2024-06-21 16:18:53,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 245 transitions, 2410 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-21 16:18:53,707 INFO L231 Difference]: Finished difference. Result has 249 places, 222 transitions, 1942 flow [2024-06-21 16:18:53,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1660, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1942, PETRI_PLACES=249, PETRI_TRANSITIONS=222} [2024-06-21 16:18:53,708 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 218 predicate places. [2024-06-21 16:18:53,708 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 222 transitions, 1942 flow [2024-06-21 16:18:53,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:53,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:53,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:53,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 16:18:53,709 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:53,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:53,709 INFO L85 PathProgramCache]: Analyzing trace with hash 494530265, now seen corresponding path program 12 times [2024-06-21 16:18:53,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:53,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2846165] [2024-06-21 16:18:53,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:53,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:54,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:54,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2846165] [2024-06-21 16:18:54,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2846165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:54,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:54,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:54,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046265803] [2024-06-21 16:18:54,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:54,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:54,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:54,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:54,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:54,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:54,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 222 transitions, 1942 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:54,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:54,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:54,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:54,980 INFO L124 PetriNetUnfolderBase]: 694/1204 cut-off events. [2024-06-21 16:18:54,981 INFO L125 PetriNetUnfolderBase]: For 119815/119815 co-relation queries the response was YES. [2024-06-21 16:18:54,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8679 conditions, 1204 events. 694/1204 cut-off events. For 119815/119815 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6064 event pairs, 79 based on Foata normal form. 3/1206 useless extension candidates. Maximal degree in co-relation 8557. Up to 711 conditions per place. [2024-06-21 16:18:54,990 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 163 selfloop transitions, 85 changer transitions 0/250 dead transitions. [2024-06-21 16:18:54,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 250 transitions, 2750 flow [2024-06-21 16:18:54,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:18:54,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:18:55,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-21 16:18:55,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-21 16:18:55,004 INFO L175 Difference]: Start difference. First operand has 249 places, 222 transitions, 1942 flow. Second operand 11 states and 146 transitions. [2024-06-21 16:18:55,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 250 transitions, 2750 flow [2024-06-21 16:18:55,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 250 transitions, 2490 flow, removed 45 selfloop flow, removed 9 redundant places. [2024-06-21 16:18:55,346 INFO L231 Difference]: Finished difference. Result has 251 places, 225 transitions, 1966 flow [2024-06-21 16:18:55,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1966, PETRI_PLACES=251, PETRI_TRANSITIONS=225} [2024-06-21 16:18:55,346 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 220 predicate places. [2024-06-21 16:18:55,347 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 225 transitions, 1966 flow [2024-06-21 16:18:55,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:55,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:55,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:55,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 16:18:55,349 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:55,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:55,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1517935533, now seen corresponding path program 5 times [2024-06-21 16:18:55,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:55,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408408934] [2024-06-21 16:18:55,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:55,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:56,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:56,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:56,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408408934] [2024-06-21 16:18:56,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408408934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:56,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:56,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:56,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495846248] [2024-06-21 16:18:56,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:56,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:56,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:56,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:56,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:56,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:56,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 225 transitions, 1966 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:56,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:56,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:56,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:56,549 INFO L124 PetriNetUnfolderBase]: 698/1212 cut-off events. [2024-06-21 16:18:56,549 INFO L125 PetriNetUnfolderBase]: For 118402/118402 co-relation queries the response was YES. [2024-06-21 16:18:56,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8735 conditions, 1212 events. 698/1212 cut-off events. For 118402/118402 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6054 event pairs, 112 based on Foata normal form. 2/1213 useless extension candidates. Maximal degree in co-relation 8612. Up to 1114 conditions per place. [2024-06-21 16:18:56,560 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 202 selfloop transitions, 36 changer transitions 0/240 dead transitions. [2024-06-21 16:18:56,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 240 transitions, 2504 flow [2024-06-21 16:18:56,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:18:56,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:18:56,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 16:18:56,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35795454545454547 [2024-06-21 16:18:56,562 INFO L175 Difference]: Start difference. First operand has 251 places, 225 transitions, 1966 flow. Second operand 11 states and 126 transitions. [2024-06-21 16:18:56,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 240 transitions, 2504 flow [2024-06-21 16:18:56,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 240 transitions, 2242 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-06-21 16:18:56,922 INFO L231 Difference]: Finished difference. Result has 253 places, 226 transitions, 1810 flow [2024-06-21 16:18:56,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1810, PETRI_PLACES=253, PETRI_TRANSITIONS=226} [2024-06-21 16:18:56,923 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 222 predicate places. [2024-06-21 16:18:56,923 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 226 transitions, 1810 flow [2024-06-21 16:18:56,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:56,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:56,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:56,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 16:18:56,923 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:56,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:56,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1517935657, now seen corresponding path program 13 times [2024-06-21 16:18:56,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:56,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271224666] [2024-06-21 16:18:56,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:56,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:57,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:57,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271224666] [2024-06-21 16:18:57,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271224666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:57,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:57,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:57,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600455428] [2024-06-21 16:18:57,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:57,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:57,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:57,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:57,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:57,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:57,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 226 transitions, 1810 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:57,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:57,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:57,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:58,225 INFO L124 PetriNetUnfolderBase]: 701/1217 cut-off events. [2024-06-21 16:18:58,225 INFO L125 PetriNetUnfolderBase]: For 115730/115730 co-relation queries the response was YES. [2024-06-21 16:18:58,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8512 conditions, 1217 events. 701/1217 cut-off events. For 115730/115730 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6134 event pairs, 81 based on Foata normal form. 1/1217 useless extension candidates. Maximal degree in co-relation 8388. Up to 685 conditions per place. [2024-06-21 16:18:58,236 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 155 selfloop transitions, 98 changer transitions 0/255 dead transitions. [2024-06-21 16:18:58,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 255 transitions, 2612 flow [2024-06-21 16:18:58,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:18:58,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:18:58,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 158 transitions. [2024-06-21 16:18:58,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4114583333333333 [2024-06-21 16:18:58,237 INFO L175 Difference]: Start difference. First operand has 253 places, 226 transitions, 1810 flow. Second operand 12 states and 158 transitions. [2024-06-21 16:18:58,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 255 transitions, 2612 flow [2024-06-21 16:18:58,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 255 transitions, 2516 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 16:18:58,650 INFO L231 Difference]: Finished difference. Result has 256 places, 228 transitions, 1993 flow [2024-06-21 16:18:58,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1993, PETRI_PLACES=256, PETRI_TRANSITIONS=228} [2024-06-21 16:18:58,650 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 225 predicate places. [2024-06-21 16:18:58,650 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 228 transitions, 1993 flow [2024-06-21 16:18:58,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:58,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:58,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:58,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 16:18:58,651 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:18:58,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:58,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1754602801, now seen corresponding path program 4 times [2024-06-21 16:18:58,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:58,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555898315] [2024-06-21 16:18:58,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:58,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:59,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:59,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555898315] [2024-06-21 16:18:59,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555898315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:59,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:59,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:18:59,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526267361] [2024-06-21 16:18:59,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:59,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:18:59,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:59,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:18:59,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:18:59,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:18:59,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 228 transitions, 1993 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:59,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:59,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:18:59,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:59,919 INFO L124 PetriNetUnfolderBase]: 712/1238 cut-off events. [2024-06-21 16:18:59,919 INFO L125 PetriNetUnfolderBase]: For 131628/131628 co-relation queries the response was YES. [2024-06-21 16:18:59,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9091 conditions, 1238 events. 712/1238 cut-off events. For 131628/131628 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6272 event pairs, 88 based on Foata normal form. 2/1239 useless extension candidates. Maximal degree in co-relation 8966. Up to 1053 conditions per place. [2024-06-21 16:18:59,929 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 200 selfloop transitions, 46 changer transitions 0/248 dead transitions. [2024-06-21 16:18:59,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 248 transitions, 2777 flow [2024-06-21 16:18:59,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:18:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:18:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 16:18:59,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-21 16:18:59,930 INFO L175 Difference]: Start difference. First operand has 256 places, 228 transitions, 1993 flow. Second operand 10 states and 122 transitions. [2024-06-21 16:18:59,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 248 transitions, 2777 flow [2024-06-21 16:19:00,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 248 transitions, 2526 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-06-21 16:19:00,349 INFO L231 Difference]: Finished difference. Result has 256 places, 230 transitions, 1872 flow [2024-06-21 16:19:00,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1742, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1872, PETRI_PLACES=256, PETRI_TRANSITIONS=230} [2024-06-21 16:19:00,350 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 225 predicate places. [2024-06-21 16:19:00,350 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 230 transitions, 1872 flow [2024-06-21 16:19:00,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:00,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:00,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:00,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 16:19:00,350 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:00,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:00,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1746260701, now seen corresponding path program 5 times [2024-06-21 16:19:00,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:00,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408119408] [2024-06-21 16:19:00,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:00,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:01,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:01,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408119408] [2024-06-21 16:19:01,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408119408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:01,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:01,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:19:01,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521869046] [2024-06-21 16:19:01,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:01,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:19:01,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:01,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:19:01,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:19:01,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:01,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 230 transitions, 1872 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:01,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:01,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:01,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:01,883 INFO L124 PetriNetUnfolderBase]: 709/1233 cut-off events. [2024-06-21 16:19:01,883 INFO L125 PetriNetUnfolderBase]: For 125301/125301 co-relation queries the response was YES. [2024-06-21 16:19:01,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8702 conditions, 1233 events. 709/1233 cut-off events. For 125301/125301 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 6244 event pairs, 80 based on Foata normal form. 2/1234 useless extension candidates. Maximal degree in co-relation 8576. Up to 1066 conditions per place. [2024-06-21 16:19:01,895 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 202 selfloop transitions, 44 changer transitions 0/248 dead transitions. [2024-06-21 16:19:01,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 248 transitions, 2446 flow [2024-06-21 16:19:01,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:19:01,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:19:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 16:19:01,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 16:19:01,896 INFO L175 Difference]: Start difference. First operand has 256 places, 230 transitions, 1872 flow. Second operand 10 states and 124 transitions. [2024-06-21 16:19:01,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 248 transitions, 2446 flow [2024-06-21 16:19:02,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 248 transitions, 2370 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 16:19:02,289 INFO L231 Difference]: Finished difference. Result has 260 places, 230 transitions, 1888 flow [2024-06-21 16:19:02,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1888, PETRI_PLACES=260, PETRI_TRANSITIONS=230} [2024-06-21 16:19:02,290 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 229 predicate places. [2024-06-21 16:19:02,290 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 230 transitions, 1888 flow [2024-06-21 16:19:02,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:02,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:02,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:02,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 16:19:02,290 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:02,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:02,291 INFO L85 PathProgramCache]: Analyzing trace with hash -51890175, now seen corresponding path program 14 times [2024-06-21 16:19:02,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:02,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397995421] [2024-06-21 16:19:02,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:02,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:02,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:02,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397995421] [2024-06-21 16:19:02,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397995421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:02,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:02,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:19:02,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854538498] [2024-06-21 16:19:02,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:02,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:19:02,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:02,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:19:02,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:19:03,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:03,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 230 transitions, 1888 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:03,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:03,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:03,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:03,408 INFO L124 PetriNetUnfolderBase]: 718/1248 cut-off events. [2024-06-21 16:19:03,409 INFO L125 PetriNetUnfolderBase]: For 133481/133481 co-relation queries the response was YES. [2024-06-21 16:19:03,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8991 conditions, 1248 events. 718/1248 cut-off events. For 133481/133481 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 6341 event pairs, 105 based on Foata normal form. 3/1250 useless extension candidates. Maximal degree in co-relation 8863. Up to 1049 conditions per place. [2024-06-21 16:19:03,419 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 213 selfloop transitions, 39 changer transitions 0/254 dead transitions. [2024-06-21 16:19:03,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 254 transitions, 2720 flow [2024-06-21 16:19:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:19:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:19:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 16:19:03,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835227272727273 [2024-06-21 16:19:03,420 INFO L175 Difference]: Start difference. First operand has 260 places, 230 transitions, 1888 flow. Second operand 11 states and 135 transitions. [2024-06-21 16:19:03,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 254 transitions, 2720 flow [2024-06-21 16:19:03,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 254 transitions, 2593 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 16:19:03,858 INFO L231 Difference]: Finished difference. Result has 259 places, 233 transitions, 1963 flow [2024-06-21 16:19:03,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1761, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1963, PETRI_PLACES=259, PETRI_TRANSITIONS=233} [2024-06-21 16:19:03,858 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 228 predicate places. [2024-06-21 16:19:03,858 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 233 transitions, 1963 flow [2024-06-21 16:19:03,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:03,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:03,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:03,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 16:19:03,859 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:03,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:03,859 INFO L85 PathProgramCache]: Analyzing trace with hash 916729531, now seen corresponding path program 6 times [2024-06-21 16:19:03,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:03,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642383578] [2024-06-21 16:19:03,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:03,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:04,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:04,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642383578] [2024-06-21 16:19:04,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642383578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:04,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:04,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:19:04,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990851098] [2024-06-21 16:19:04,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:04,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:19:04,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:04,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:19:04,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:19:05,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:05,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 233 transitions, 1963 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:05,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:05,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:05,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:05,608 INFO L124 PetriNetUnfolderBase]: 728/1266 cut-off events. [2024-06-21 16:19:05,608 INFO L125 PetriNetUnfolderBase]: For 132703/132703 co-relation queries the response was YES. [2024-06-21 16:19:05,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9171 conditions, 1266 events. 728/1266 cut-off events. For 132703/132703 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 6478 event pairs, 99 based on Foata normal form. 2/1267 useless extension candidates. Maximal degree in co-relation 9045. Up to 1166 conditions per place. [2024-06-21 16:19:05,621 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 222 selfloop transitions, 29 changer transitions 0/253 dead transitions. [2024-06-21 16:19:05,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 253 transitions, 2649 flow [2024-06-21 16:19:05,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:19:05,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:19:05,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 16:19:05,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36875 [2024-06-21 16:19:05,623 INFO L175 Difference]: Start difference. First operand has 259 places, 233 transitions, 1963 flow. Second operand 10 states and 118 transitions. [2024-06-21 16:19:05,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 253 transitions, 2649 flow [2024-06-21 16:19:06,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 253 transitions, 2465 flow, removed 53 selfloop flow, removed 9 redundant places. [2024-06-21 16:19:06,211 INFO L231 Difference]: Finished difference. Result has 261 places, 237 transitions, 1924 flow [2024-06-21 16:19:06,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1924, PETRI_PLACES=261, PETRI_TRANSITIONS=237} [2024-06-21 16:19:06,212 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 230 predicate places. [2024-06-21 16:19:06,212 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 237 transitions, 1924 flow [2024-06-21 16:19:06,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:06,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:06,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:06,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 16:19:06,213 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:06,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:06,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1497804685, now seen corresponding path program 7 times [2024-06-21 16:19:06,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:06,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545164221] [2024-06-21 16:19:06,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:06,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:07,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:07,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545164221] [2024-06-21 16:19:07,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545164221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:07,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:07,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:19:07,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803930886] [2024-06-21 16:19:07,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:07,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:19:07,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:07,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:19:07,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:19:07,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:07,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 237 transitions, 1924 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:07,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:07,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:07,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:07,596 INFO L124 PetriNetUnfolderBase]: 732/1274 cut-off events. [2024-06-21 16:19:07,596 INFO L125 PetriNetUnfolderBase]: For 134907/134907 co-relation queries the response was YES. [2024-06-21 16:19:07,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9116 conditions, 1274 events. 732/1274 cut-off events. For 134907/134907 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6502 event pairs, 105 based on Foata normal form. 2/1275 useless extension candidates. Maximal degree in co-relation 8988. Up to 1191 conditions per place. [2024-06-21 16:19:07,608 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 225 selfloop transitions, 28 changer transitions 0/255 dead transitions. [2024-06-21 16:19:07,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 255 transitions, 2581 flow [2024-06-21 16:19:07,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:19:07,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:19:07,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 16:19:07,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.359375 [2024-06-21 16:19:07,609 INFO L175 Difference]: Start difference. First operand has 261 places, 237 transitions, 1924 flow. Second operand 10 states and 115 transitions. [2024-06-21 16:19:07,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 255 transitions, 2581 flow [2024-06-21 16:19:08,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 255 transitions, 2473 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 16:19:08,130 INFO L231 Difference]: Finished difference. Result has 265 places, 241 transitions, 1966 flow [2024-06-21 16:19:08,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1966, PETRI_PLACES=265, PETRI_TRANSITIONS=241} [2024-06-21 16:19:08,130 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 234 predicate places. [2024-06-21 16:19:08,130 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 241 transitions, 1966 flow [2024-06-21 16:19:08,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:08,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:08,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:08,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 16:19:08,131 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:08,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:08,131 INFO L85 PathProgramCache]: Analyzing trace with hash -892722687, now seen corresponding path program 15 times [2024-06-21 16:19:08,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:08,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958816314] [2024-06-21 16:19:08,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:08,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:08,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:08,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958816314] [2024-06-21 16:19:08,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958816314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:08,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:08,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:19:08,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542606686] [2024-06-21 16:19:08,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:08,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:19:08,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:08,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:19:08,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:19:08,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:08,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 241 transitions, 1966 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:08,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:08,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:08,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:09,252 INFO L124 PetriNetUnfolderBase]: 741/1289 cut-off events. [2024-06-21 16:19:09,253 INFO L125 PetriNetUnfolderBase]: For 144362/144362 co-relation queries the response was YES. [2024-06-21 16:19:09,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9381 conditions, 1289 events. 741/1289 cut-off events. For 144362/144362 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 6615 event pairs, 99 based on Foata normal form. 3/1291 useless extension candidates. Maximal degree in co-relation 9251. Up to 1082 conditions per place. [2024-06-21 16:19:09,265 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 215 selfloop transitions, 47 changer transitions 0/264 dead transitions. [2024-06-21 16:19:09,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 264 transitions, 2818 flow [2024-06-21 16:19:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:19:09,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:19:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 16:19:09,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778409090909091 [2024-06-21 16:19:09,267 INFO L175 Difference]: Start difference. First operand has 265 places, 241 transitions, 1966 flow. Second operand 11 states and 133 transitions. [2024-06-21 16:19:09,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 264 transitions, 2818 flow [2024-06-21 16:19:09,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 264 transitions, 2721 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 16:19:09,809 INFO L231 Difference]: Finished difference. Result has 271 places, 244 transitions, 2105 flow [2024-06-21 16:19:09,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2105, PETRI_PLACES=271, PETRI_TRANSITIONS=244} [2024-06-21 16:19:09,809 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 240 predicate places. [2024-06-21 16:19:09,810 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 244 transitions, 2105 flow [2024-06-21 16:19:09,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:09,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:09,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:09,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 16:19:09,810 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:09,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:09,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1391066585, now seen corresponding path program 8 times [2024-06-21 16:19:09,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:09,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700011508] [2024-06-21 16:19:09,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:09,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:10,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:10,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700011508] [2024-06-21 16:19:10,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700011508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:10,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:10,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:19:10,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034216046] [2024-06-21 16:19:10,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:10,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:19:10,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:10,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:19:10,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:19:11,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:11,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 244 transitions, 2105 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:11,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:11,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:11,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:11,407 INFO L124 PetriNetUnfolderBase]: 752/1310 cut-off events. [2024-06-21 16:19:11,407 INFO L125 PetriNetUnfolderBase]: For 151892/151892 co-relation queries the response was YES. [2024-06-21 16:19:11,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9796 conditions, 1310 events. 752/1310 cut-off events. For 151892/151892 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6760 event pairs, 108 based on Foata normal form. 2/1311 useless extension candidates. Maximal degree in co-relation 9665. Up to 1198 conditions per place. [2024-06-21 16:19:11,421 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 228 selfloop transitions, 31 changer transitions 0/261 dead transitions. [2024-06-21 16:19:11,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 261 transitions, 2935 flow [2024-06-21 16:19:11,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:19:11,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:19:11,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 16:19:11,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3625 [2024-06-21 16:19:11,422 INFO L175 Difference]: Start difference. First operand has 271 places, 244 transitions, 2105 flow. Second operand 10 states and 116 transitions. [2024-06-21 16:19:11,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 261 transitions, 2935 flow [2024-06-21 16:19:11,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 261 transitions, 2731 flow, removed 57 selfloop flow, removed 9 redundant places. [2024-06-21 16:19:11,994 INFO L231 Difference]: Finished difference. Result has 272 places, 246 transitions, 2013 flow [2024-06-21 16:19:11,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1901, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2013, PETRI_PLACES=272, PETRI_TRANSITIONS=246} [2024-06-21 16:19:11,995 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 241 predicate places. [2024-06-21 16:19:11,995 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 246 transitions, 2013 flow [2024-06-21 16:19:11,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:11,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:11,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:11,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 16:19:11,996 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:11,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:11,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1628866019, now seen corresponding path program 9 times [2024-06-21 16:19:11,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:11,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596156753] [2024-06-21 16:19:11,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:11,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:12,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:12,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596156753] [2024-06-21 16:19:12,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596156753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:12,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:12,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:19:12,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718919426] [2024-06-21 16:19:12,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:12,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:19:12,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:12,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:19:12,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:19:12,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:12,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 246 transitions, 2013 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:12,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:12,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:12,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:13,327 INFO L124 PetriNetUnfolderBase]: 756/1318 cut-off events. [2024-06-21 16:19:13,327 INFO L125 PetriNetUnfolderBase]: For 153115/153115 co-relation queries the response was YES. [2024-06-21 16:19:13,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9655 conditions, 1318 events. 756/1318 cut-off events. For 153115/153115 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 6818 event pairs, 114 based on Foata normal form. 2/1319 useless extension candidates. Maximal degree in co-relation 9523. Up to 1270 conditions per place. [2024-06-21 16:19:13,340 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 236 selfloop transitions, 21 changer transitions 0/259 dead transitions. [2024-06-21 16:19:13,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 259 transitions, 2581 flow [2024-06-21 16:19:13,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:19:13,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:19:13,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-21 16:19:13,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.340625 [2024-06-21 16:19:13,341 INFO L175 Difference]: Start difference. First operand has 272 places, 246 transitions, 2013 flow. Second operand 10 states and 109 transitions. [2024-06-21 16:19:13,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 259 transitions, 2581 flow [2024-06-21 16:19:13,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 259 transitions, 2520 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:19:13,852 INFO L231 Difference]: Finished difference. Result has 276 places, 247 transitions, 2025 flow [2024-06-21 16:19:13,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1952, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2025, PETRI_PLACES=276, PETRI_TRANSITIONS=247} [2024-06-21 16:19:13,852 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 245 predicate places. [2024-06-21 16:19:13,852 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 247 transitions, 2025 flow [2024-06-21 16:19:13,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:13,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:13,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:13,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 16:19:13,853 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:13,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:13,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1261152421, now seen corresponding path program 16 times [2024-06-21 16:19:13,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:13,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650141835] [2024-06-21 16:19:13,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:13,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:14,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:14,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650141835] [2024-06-21 16:19:14,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650141835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:14,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:14,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:19:14,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16247799] [2024-06-21 16:19:14,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:14,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:19:14,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:14,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:19:14,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:19:14,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:14,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 247 transitions, 2025 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:14,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:14,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:14,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:15,107 INFO L124 PetriNetUnfolderBase]: 765/1333 cut-off events. [2024-06-21 16:19:15,108 INFO L125 PetriNetUnfolderBase]: For 162609/162609 co-relation queries the response was YES. [2024-06-21 16:19:15,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9902 conditions, 1333 events. 765/1333 cut-off events. For 162609/162609 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 6925 event pairs, 92 based on Foata normal form. 3/1335 useless extension candidates. Maximal degree in co-relation 9768. Up to 1126 conditions per place. [2024-06-21 16:19:15,122 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 218 selfloop transitions, 50 changer transitions 0/270 dead transitions. [2024-06-21 16:19:15,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 270 transitions, 2893 flow [2024-06-21 16:19:15,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:19:15,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:19:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 16:19:15,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 16:19:15,123 INFO L175 Difference]: Start difference. First operand has 276 places, 247 transitions, 2025 flow. Second operand 11 states and 132 transitions. [2024-06-21 16:19:15,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 270 transitions, 2893 flow [2024-06-21 16:19:15,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 270 transitions, 2832 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 16:19:15,737 INFO L231 Difference]: Finished difference. Result has 279 places, 250 transitions, 2202 flow [2024-06-21 16:19:15,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1964, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2202, PETRI_PLACES=279, PETRI_TRANSITIONS=250} [2024-06-21 16:19:15,738 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 248 predicate places. [2024-06-21 16:19:15,738 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 250 transitions, 2202 flow [2024-06-21 16:19:15,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:15,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:15,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:15,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 16:19:15,739 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:15,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:15,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1160833181, now seen corresponding path program 17 times [2024-06-21 16:19:15,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:15,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171918767] [2024-06-21 16:19:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:15,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:16,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:16,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171918767] [2024-06-21 16:19:16,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171918767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:16,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:16,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:19:16,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27410455] [2024-06-21 16:19:16,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:16,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:19:16,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:16,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:19:16,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:19:16,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:16,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 250 transitions, 2202 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:16,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:16,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:16,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:17,057 INFO L124 PetriNetUnfolderBase]: 774/1348 cut-off events. [2024-06-21 16:19:17,057 INFO L125 PetriNetUnfolderBase]: For 168756/168756 co-relation queries the response was YES. [2024-06-21 16:19:17,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10342 conditions, 1348 events. 774/1348 cut-off events. For 168756/168756 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7034 event pairs, 108 based on Foata normal form. 3/1350 useless extension candidates. Maximal degree in co-relation 10207. Up to 1141 conditions per place. [2024-06-21 16:19:17,071 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 228 selfloop transitions, 43 changer transitions 0/273 dead transitions. [2024-06-21 16:19:17,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 273 transitions, 3090 flow [2024-06-21 16:19:17,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:19:17,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:19:17,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 16:19:17,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806818181818182 [2024-06-21 16:19:17,075 INFO L175 Difference]: Start difference. First operand has 279 places, 250 transitions, 2202 flow. Second operand 11 states and 134 transitions. [2024-06-21 16:19:17,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 273 transitions, 3090 flow [2024-06-21 16:19:17,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 273 transitions, 2874 flow, removed 60 selfloop flow, removed 9 redundant places. [2024-06-21 16:19:17,794 INFO L231 Difference]: Finished difference. Result has 281 places, 253 transitions, 2216 flow [2024-06-21 16:19:17,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2216, PETRI_PLACES=281, PETRI_TRANSITIONS=253} [2024-06-21 16:19:17,794 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 250 predicate places. [2024-06-21 16:19:17,794 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 253 transitions, 2216 flow [2024-06-21 16:19:17,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:17,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:17,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:17,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 16:19:17,795 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:17,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:17,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1161079445, now seen corresponding path program 10 times [2024-06-21 16:19:17,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:17,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687782664] [2024-06-21 16:19:17,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:17,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:18,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:18,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687782664] [2024-06-21 16:19:18,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687782664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:18,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:18,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:19:18,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767576989] [2024-06-21 16:19:18,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:18,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:19:18,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:18,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:19:18,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:19:18,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:18,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 253 transitions, 2216 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:18,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:18,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:18,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:19,353 INFO L124 PetriNetUnfolderBase]: 771/1343 cut-off events. [2024-06-21 16:19:19,353 INFO L125 PetriNetUnfolderBase]: For 155528/155528 co-relation queries the response was YES. [2024-06-21 16:19:19,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10010 conditions, 1343 events. 771/1343 cut-off events. For 155528/155528 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 6981 event pairs, 105 based on Foata normal form. 2/1344 useless extension candidates. Maximal degree in co-relation 9874. Up to 1243 conditions per place. [2024-06-21 16:19:19,367 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 231 selfloop transitions, 34 changer transitions 0/267 dead transitions. [2024-06-21 16:19:19,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 267 transitions, 2824 flow [2024-06-21 16:19:19,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:19:19,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:19:19,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 16:19:19,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.359375 [2024-06-21 16:19:19,368 INFO L175 Difference]: Start difference. First operand has 281 places, 253 transitions, 2216 flow. Second operand 10 states and 115 transitions. [2024-06-21 16:19:19,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 267 transitions, 2824 flow [2024-06-21 16:19:20,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 267 transitions, 2606 flow, removed 68 selfloop flow, removed 9 redundant places. [2024-06-21 16:19:20,121 INFO L231 Difference]: Finished difference. Result has 282 places, 253 transitions, 2070 flow [2024-06-21 16:19:20,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2070, PETRI_PLACES=282, PETRI_TRANSITIONS=253} [2024-06-21 16:19:20,121 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 251 predicate places. [2024-06-21 16:19:20,121 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 253 transitions, 2070 flow [2024-06-21 16:19:20,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:20,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:20,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:20,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 16:19:20,122 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:20,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:20,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1154399317, now seen corresponding path program 6 times [2024-06-21 16:19:20,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:20,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229094710] [2024-06-21 16:19:20,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:20,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:21,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:21,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229094710] [2024-06-21 16:19:21,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229094710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:21,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:21,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:19:21,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022424761] [2024-06-21 16:19:21,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:21,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:19:21,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:21,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:19:21,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:19:21,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:21,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 253 transitions, 2070 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:21,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:21,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:21,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:21,508 INFO L124 PetriNetUnfolderBase]: 768/1338 cut-off events. [2024-06-21 16:19:21,508 INFO L125 PetriNetUnfolderBase]: For 145678/145678 co-relation queries the response was YES. [2024-06-21 16:19:21,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9539 conditions, 1338 events. 768/1338 cut-off events. For 145678/145678 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 6948 event pairs, 120 based on Foata normal form. 2/1339 useless extension candidates. Maximal degree in co-relation 9402. Up to 1306 conditions per place. [2024-06-21 16:19:21,520 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 244 selfloop transitions, 18 changer transitions 0/264 dead transitions. [2024-06-21 16:19:21,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 264 transitions, 2618 flow [2024-06-21 16:19:21,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:19:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:19:21,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-06-21 16:19:21,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32670454545454547 [2024-06-21 16:19:21,521 INFO L175 Difference]: Start difference. First operand has 282 places, 253 transitions, 2070 flow. Second operand 11 states and 115 transitions. [2024-06-21 16:19:21,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 264 transitions, 2618 flow [2024-06-21 16:19:22,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 264 transitions, 2526 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 16:19:22,222 INFO L231 Difference]: Finished difference. Result has 283 places, 253 transitions, 2018 flow [2024-06-21 16:19:22,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1978, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2018, PETRI_PLACES=283, PETRI_TRANSITIONS=253} [2024-06-21 16:19:22,223 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 252 predicate places. [2024-06-21 16:19:22,223 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 253 transitions, 2018 flow [2024-06-21 16:19:22,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:22,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:22,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:22,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 16:19:22,223 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:22,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:22,224 INFO L85 PathProgramCache]: Analyzing trace with hash 485792611, now seen corresponding path program 11 times [2024-06-21 16:19:22,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:22,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097309981] [2024-06-21 16:19:22,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:22,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:23,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:23,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097309981] [2024-06-21 16:19:23,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097309981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:23,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:23,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:19:23,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253244571] [2024-06-21 16:19:23,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:23,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:19:23,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:23,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:19:23,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:19:23,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:23,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 253 transitions, 2018 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:23,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:23,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:23,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:23,665 INFO L124 PetriNetUnfolderBase]: 778/1356 cut-off events. [2024-06-21 16:19:23,666 INFO L125 PetriNetUnfolderBase]: For 148278/148278 co-relation queries the response was YES. [2024-06-21 16:19:23,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9609 conditions, 1356 events. 778/1356 cut-off events. For 148278/148278 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 7069 event pairs, 108 based on Foata normal form. 2/1357 useless extension candidates. Maximal degree in co-relation 9472. Up to 1293 conditions per place. [2024-06-21 16:19:23,678 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 245 selfloop transitions, 23 changer transitions 0/270 dead transitions. [2024-06-21 16:19:23,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 270 transitions, 2676 flow [2024-06-21 16:19:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:19:23,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:19:23,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-21 16:19:23,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-21 16:19:23,679 INFO L175 Difference]: Start difference. First operand has 283 places, 253 transitions, 2018 flow. Second operand 10 states and 112 transitions. [2024-06-21 16:19:23,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 270 transitions, 2676 flow [2024-06-21 16:19:24,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 270 transitions, 2570 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-06-21 16:19:24,423 INFO L231 Difference]: Finished difference. Result has 283 places, 257 transitions, 2062 flow [2024-06-21 16:19:24,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1912, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2062, PETRI_PLACES=283, PETRI_TRANSITIONS=257} [2024-06-21 16:19:24,424 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 252 predicate places. [2024-06-21 16:19:24,424 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 257 transitions, 2062 flow [2024-06-21 16:19:24,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:24,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:24,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:24,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 16:19:24,424 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:24,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:24,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1154399441, now seen corresponding path program 18 times [2024-06-21 16:19:24,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:24,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975844087] [2024-06-21 16:19:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:24,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:25,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:25,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975844087] [2024-06-21 16:19:25,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975844087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:25,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:25,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:19:25,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687560444] [2024-06-21 16:19:25,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:25,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:19:25,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:25,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:19:25,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:19:25,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:25,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 257 transitions, 2062 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:25,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:25,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:25,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:25,625 INFO L124 PetriNetUnfolderBase]: 781/1361 cut-off events. [2024-06-21 16:19:25,625 INFO L125 PetriNetUnfolderBase]: For 147241/147241 co-relation queries the response was YES. [2024-06-21 16:19:25,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9747 conditions, 1361 events. 781/1361 cut-off events. For 147241/147241 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 7091 event pairs, 110 based on Foata normal form. 1/1361 useless extension candidates. Maximal degree in co-relation 9609. Up to 1271 conditions per place. [2024-06-21 16:19:25,639 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 239 selfloop transitions, 47 changer transitions 0/288 dead transitions. [2024-06-21 16:19:25,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 288 transitions, 3235 flow [2024-06-21 16:19:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:19:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:19:25,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 16:19:25,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3465909090909091 [2024-06-21 16:19:25,641 INFO L175 Difference]: Start difference. First operand has 283 places, 257 transitions, 2062 flow. Second operand 11 states and 122 transitions. [2024-06-21 16:19:25,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 288 transitions, 3235 flow [2024-06-21 16:19:26,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 288 transitions, 3080 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-21 16:19:26,382 INFO L231 Difference]: Finished difference. Result has 289 places, 277 transitions, 2457 flow [2024-06-21 16:19:26,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2457, PETRI_PLACES=289, PETRI_TRANSITIONS=277} [2024-06-21 16:19:26,382 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 258 predicate places. [2024-06-21 16:19:26,383 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 277 transitions, 2457 flow [2024-06-21 16:19:26,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:26,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:26,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:26,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 16:19:26,383 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:26,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:26,384 INFO L85 PathProgramCache]: Analyzing trace with hash 494124481, now seen corresponding path program 12 times [2024-06-21 16:19:26,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:26,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503301688] [2024-06-21 16:19:26,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:26,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:27,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:27,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503301688] [2024-06-21 16:19:27,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503301688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:27,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:27,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:19:27,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249169564] [2024-06-21 16:19:27,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:27,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:19:27,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:27,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:19:27,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:19:27,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:27,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 277 transitions, 2457 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:27,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:27,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:27,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:27,864 INFO L124 PetriNetUnfolderBase]: 785/1369 cut-off events. [2024-06-21 16:19:27,864 INFO L125 PetriNetUnfolderBase]: For 155808/155808 co-relation queries the response was YES. [2024-06-21 16:19:27,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9871 conditions, 1369 events. 785/1369 cut-off events. For 155808/155808 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 7161 event pairs, 112 based on Foata normal form. 2/1370 useless extension candidates. Maximal degree in co-relation 9731. Up to 1323 conditions per place. [2024-06-21 16:19:27,878 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 269 selfloop transitions, 19 changer transitions 0/290 dead transitions. [2024-06-21 16:19:27,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 290 transitions, 3089 flow [2024-06-21 16:19:27,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:19:27,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:19:27,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 16:19:27,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2024-06-21 16:19:27,879 INFO L175 Difference]: Start difference. First operand has 289 places, 277 transitions, 2457 flow. Second operand 10 states and 110 transitions. [2024-06-21 16:19:27,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 290 transitions, 3089 flow [2024-06-21 16:19:28,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 290 transitions, 2856 flow, removed 100 selfloop flow, removed 7 redundant places. [2024-06-21 16:19:28,570 INFO L231 Difference]: Finished difference. Result has 292 places, 278 transitions, 2294 flow [2024-06-21 16:19:28,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2224, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2294, PETRI_PLACES=292, PETRI_TRANSITIONS=278} [2024-06-21 16:19:28,570 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 261 predicate places. [2024-06-21 16:19:28,570 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 278 transitions, 2294 flow [2024-06-21 16:19:28,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:28,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:28,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:28,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 16:19:28,571 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:28,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:28,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1856846577, now seen corresponding path program 13 times [2024-06-21 16:19:28,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:28,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538707970] [2024-06-21 16:19:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:28,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:29,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:29,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538707970] [2024-06-21 16:19:29,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538707970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:29,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:29,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:19:29,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120305686] [2024-06-21 16:19:29,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:29,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:19:29,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:29,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:19:29,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:19:29,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:29,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 278 transitions, 2294 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:29,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:29,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:29,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:29,946 INFO L124 PetriNetUnfolderBase]: 789/1377 cut-off events. [2024-06-21 16:19:29,946 INFO L125 PetriNetUnfolderBase]: For 150881/150881 co-relation queries the response was YES. [2024-06-21 16:19:29,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9366 conditions, 1377 events. 789/1377 cut-off events. For 150881/150881 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 7225 event pairs, 114 based on Foata normal form. 2/1378 useless extension candidates. Maximal degree in co-relation 9227. Up to 1311 conditions per place. [2024-06-21 16:19:29,961 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 268 selfloop transitions, 21 changer transitions 0/291 dead transitions. [2024-06-21 16:19:29,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 291 transitions, 2928 flow [2024-06-21 16:19:29,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:19:29,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:19:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 16:19:29,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2024-06-21 16:19:29,962 INFO L175 Difference]: Start difference. First operand has 292 places, 278 transitions, 2294 flow. Second operand 10 states and 110 transitions. [2024-06-21 16:19:29,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 291 transitions, 2928 flow [2024-06-21 16:19:30,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 291 transitions, 2863 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 16:19:30,653 INFO L231 Difference]: Finished difference. Result has 295 places, 279 transitions, 2305 flow [2024-06-21 16:19:30,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2305, PETRI_PLACES=295, PETRI_TRANSITIONS=279} [2024-06-21 16:19:30,654 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 264 predicate places. [2024-06-21 16:19:30,654 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 279 transitions, 2305 flow [2024-06-21 16:19:30,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:30,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:30,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:30,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 16:19:30,668 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:30,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:30,669 INFO L85 PathProgramCache]: Analyzing trace with hash 485546347, now seen corresponding path program 19 times [2024-06-21 16:19:30,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:30,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428304109] [2024-06-21 16:19:30,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:30,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:31,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:31,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428304109] [2024-06-21 16:19:31,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428304109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:31,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:31,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:19:31,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619318154] [2024-06-21 16:19:31,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:31,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:19:31,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:31,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:19:31,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:19:31,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:31,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 279 transitions, 2305 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:31,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:31,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:31,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:31,955 INFO L124 PetriNetUnfolderBase]: 793/1384 cut-off events. [2024-06-21 16:19:31,956 INFO L125 PetriNetUnfolderBase]: For 154875/154875 co-relation queries the response was YES. [2024-06-21 16:19:31,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9358 conditions, 1384 events. 793/1384 cut-off events. For 154875/154875 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 7253 event pairs, 112 based on Foata normal form. 3/1386 useless extension candidates. Maximal degree in co-relation 9219. Up to 1303 conditions per place. [2024-06-21 16:19:31,969 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 269 selfloop transitions, 27 changer transitions 0/298 dead transitions. [2024-06-21 16:19:31,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 298 transitions, 3045 flow [2024-06-21 16:19:31,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:19:31,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:19:31,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-21 16:19:31,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35511363636363635 [2024-06-21 16:19:31,970 INFO L175 Difference]: Start difference. First operand has 295 places, 279 transitions, 2305 flow. Second operand 11 states and 125 transitions. [2024-06-21 16:19:31,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 298 transitions, 3045 flow [2024-06-21 16:19:32,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 298 transitions, 2923 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-21 16:19:32,601 INFO L231 Difference]: Finished difference. Result has 298 places, 281 transitions, 2345 flow [2024-06-21 16:19:32,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2345, PETRI_PLACES=298, PETRI_TRANSITIONS=281} [2024-06-21 16:19:32,602 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 267 predicate places. [2024-06-21 16:19:32,602 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 281 transitions, 2345 flow [2024-06-21 16:19:32,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:32,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:32,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:32,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 16:19:32,602 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:32,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:32,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1983139289, now seen corresponding path program 14 times [2024-06-21 16:19:32,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:32,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901268446] [2024-06-21 16:19:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:32,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:33,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:33,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901268446] [2024-06-21 16:19:33,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901268446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:33,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:33,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:19:33,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104288445] [2024-06-21 16:19:33,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:33,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:19:33,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:33,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:19:33,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:19:33,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:33,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 281 transitions, 2345 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:33,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:33,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:33,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:33,954 INFO L124 PetriNetUnfolderBase]: 797/1392 cut-off events. [2024-06-21 16:19:33,954 INFO L125 PetriNetUnfolderBase]: For 151288/151288 co-relation queries the response was YES. [2024-06-21 16:19:33,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9399 conditions, 1392 events. 797/1392 cut-off events. For 151288/151288 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 7326 event pairs, 118 based on Foata normal form. 2/1393 useless extension candidates. Maximal degree in co-relation 9259. Up to 1350 conditions per place. [2024-06-21 16:19:33,968 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 277 selfloop transitions, 15 changer transitions 0/294 dead transitions. [2024-06-21 16:19:33,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 294 transitions, 2985 flow [2024-06-21 16:19:33,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:19:33,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:19:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-21 16:19:33,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33125 [2024-06-21 16:19:33,969 INFO L175 Difference]: Start difference. First operand has 298 places, 281 transitions, 2345 flow. Second operand 10 states and 106 transitions. [2024-06-21 16:19:33,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 294 transitions, 2985 flow [2024-06-21 16:19:34,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 294 transitions, 2829 flow, removed 54 selfloop flow, removed 9 redundant places. [2024-06-21 16:19:34,665 INFO L231 Difference]: Finished difference. Result has 299 places, 282 transitions, 2255 flow [2024-06-21 16:19:34,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2189, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2255, PETRI_PLACES=299, PETRI_TRANSITIONS=282} [2024-06-21 16:19:34,665 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 268 predicate places. [2024-06-21 16:19:34,665 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 282 transitions, 2255 flow [2024-06-21 16:19:34,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:34,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:34,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:34,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 16:19:34,666 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:34,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:34,666 INFO L85 PathProgramCache]: Analyzing trace with hash -379816989, now seen corresponding path program 1 times [2024-06-21 16:19:34,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:34,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946834205] [2024-06-21 16:19:34,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:34,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:35,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:35,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946834205] [2024-06-21 16:19:35,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946834205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:35,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:35,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:19:35,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854410543] [2024-06-21 16:19:35,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:35,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:19:35,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:35,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:19:35,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:19:35,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:35,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 282 transitions, 2255 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:35,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:35,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:35,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:35,997 INFO L124 PetriNetUnfolderBase]: 795/1389 cut-off events. [2024-06-21 16:19:35,998 INFO L125 PetriNetUnfolderBase]: For 141103/141103 co-relation queries the response was YES. [2024-06-21 16:19:36,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9115 conditions, 1389 events. 795/1389 cut-off events. For 141103/141103 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 7327 event pairs, 118 based on Foata normal form. 1/1389 useless extension candidates. Maximal degree in co-relation 8974. Up to 1338 conditions per place. [2024-06-21 16:19:36,012 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 270 selfloop transitions, 24 changer transitions 0/296 dead transitions. [2024-06-21 16:19:36,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 296 transitions, 2929 flow [2024-06-21 16:19:36,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:19:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:19:36,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 16:19:36,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2024-06-21 16:19:36,013 INFO L175 Difference]: Start difference. First operand has 299 places, 282 transitions, 2255 flow. Second operand 10 states and 110 transitions. [2024-06-21 16:19:36,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 296 transitions, 2929 flow [2024-06-21 16:19:36,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 296 transitions, 2873 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 16:19:36,705 INFO L231 Difference]: Finished difference. Result has 301 places, 284 transitions, 2313 flow [2024-06-21 16:19:36,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2199, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2313, PETRI_PLACES=301, PETRI_TRANSITIONS=284} [2024-06-21 16:19:36,705 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 270 predicate places. [2024-06-21 16:19:36,705 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 284 transitions, 2313 flow [2024-06-21 16:19:36,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:36,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:36,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:36,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 16:19:36,706 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:36,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:36,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1628568791, now seen corresponding path program 1 times [2024-06-21 16:19:36,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:36,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653434913] [2024-06-21 16:19:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:36,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:37,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:37,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653434913] [2024-06-21 16:19:37,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653434913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:37,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:37,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:19:37,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957241035] [2024-06-21 16:19:37,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:37,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:19:37,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:37,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:19:37,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:19:37,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:37,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 284 transitions, 2313 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:37,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:37,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:37,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:37,967 INFO L124 PetriNetUnfolderBase]: 796/1391 cut-off events. [2024-06-21 16:19:37,967 INFO L125 PetriNetUnfolderBase]: For 143087/143087 co-relation queries the response was YES. [2024-06-21 16:19:37,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9077 conditions, 1391 events. 796/1391 cut-off events. For 143087/143087 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 7351 event pairs, 117 based on Foata normal form. 2/1392 useless extension candidates. Maximal degree in co-relation 8935. Up to 1344 conditions per place. [2024-06-21 16:19:37,979 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 278 selfloop transitions, 20 changer transitions 0/300 dead transitions. [2024-06-21 16:19:37,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 300 transitions, 3007 flow [2024-06-21 16:19:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:19:37,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:19:37,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 16:19:37,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2024-06-21 16:19:37,980 INFO L175 Difference]: Start difference. First operand has 301 places, 284 transitions, 2313 flow. Second operand 11 states and 120 transitions. [2024-06-21 16:19:37,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 300 transitions, 3007 flow [2024-06-21 16:19:38,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 300 transitions, 2911 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 16:19:38,594 INFO L231 Difference]: Finished difference. Result has 304 places, 286 transitions, 2326 flow [2024-06-21 16:19:38,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2326, PETRI_PLACES=304, PETRI_TRANSITIONS=286} [2024-06-21 16:19:38,594 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 273 predicate places. [2024-06-21 16:19:38,594 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 286 transitions, 2326 flow [2024-06-21 16:19:38,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:38,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:38,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:38,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 16:19:38,595 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:38,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:38,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1971174839, now seen corresponding path program 15 times [2024-06-21 16:19:38,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:38,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925656685] [2024-06-21 16:19:38,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:38,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:39,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:39,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925656685] [2024-06-21 16:19:39,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925656685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:39,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:39,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:19:39,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792299291] [2024-06-21 16:19:39,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:39,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:19:39,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:39,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:19:39,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:19:39,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:39,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 286 transitions, 2326 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:39,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:39,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:39,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:39,891 INFO L124 PetriNetUnfolderBase]: 793/1386 cut-off events. [2024-06-21 16:19:39,892 INFO L125 PetriNetUnfolderBase]: For 130709/130709 co-relation queries the response was YES. [2024-06-21 16:19:39,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8778 conditions, 1386 events. 793/1386 cut-off events. For 130709/130709 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 7326 event pairs, 118 based on Foata normal form. 2/1387 useless extension candidates. Maximal degree in co-relation 8635. Up to 1322 conditions per place. [2024-06-21 16:19:39,905 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 275 selfloop transitions, 21 changer transitions 0/298 dead transitions. [2024-06-21 16:19:39,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 298 transitions, 2946 flow [2024-06-21 16:19:39,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:19:39,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:19:39,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 16:19:39,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2024-06-21 16:19:39,906 INFO L175 Difference]: Start difference. First operand has 304 places, 286 transitions, 2326 flow. Second operand 10 states and 110 transitions. [2024-06-21 16:19:39,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 298 transitions, 2946 flow [2024-06-21 16:19:40,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 298 transitions, 2855 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-21 16:19:40,697 INFO L231 Difference]: Finished difference. Result has 305 places, 286 transitions, 2281 flow [2024-06-21 16:19:40,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2235, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2281, PETRI_PLACES=305, PETRI_TRANSITIONS=286} [2024-06-21 16:19:40,698 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 274 predicate places. [2024-06-21 16:19:40,698 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 286 transitions, 2281 flow [2024-06-21 16:19:40,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:40,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:40,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:40,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 16:19:40,699 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:40,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:40,699 INFO L85 PathProgramCache]: Analyzing trace with hash 257623475, now seen corresponding path program 1 times [2024-06-21 16:19:40,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:40,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306028998] [2024-06-21 16:19:40,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:40,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:41,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:41,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306028998] [2024-06-21 16:19:41,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306028998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:41,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:41,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:19:41,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98832114] [2024-06-21 16:19:41,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:41,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:19:41,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:41,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:19:41,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:19:41,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:41,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 286 transitions, 2281 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:19:41,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:41,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:41,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:42,144 INFO L124 PetriNetUnfolderBase]: 840/1479 cut-off events. [2024-06-21 16:19:42,144 INFO L125 PetriNetUnfolderBase]: For 219140/219140 co-relation queries the response was YES. [2024-06-21 16:19:42,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11017 conditions, 1479 events. 840/1479 cut-off events. For 219140/219140 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 7895 event pairs, 117 based on Foata normal form. 2/1480 useless extension candidates. Maximal degree in co-relation 10873. Up to 1255 conditions per place. [2024-06-21 16:19:42,161 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 294 selfloop transitions, 30 changer transitions 0/326 dead transitions. [2024-06-21 16:19:42,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 326 transitions, 3447 flow [2024-06-21 16:19:42,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:19:42,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:19:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 162 transitions. [2024-06-21 16:19:42,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894230769230769 [2024-06-21 16:19:42,162 INFO L175 Difference]: Start difference. First operand has 305 places, 286 transitions, 2281 flow. Second operand 13 states and 162 transitions. [2024-06-21 16:19:42,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 326 transitions, 3447 flow [2024-06-21 16:19:42,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 326 transitions, 3272 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-21 16:19:42,986 INFO L231 Difference]: Finished difference. Result has 307 places, 288 transitions, 2256 flow [2024-06-21 16:19:42,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2106, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2256, PETRI_PLACES=307, PETRI_TRANSITIONS=288} [2024-06-21 16:19:42,987 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 276 predicate places. [2024-06-21 16:19:42,987 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 288 transitions, 2256 flow [2024-06-21 16:19:42,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:19:42,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:42,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:42,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 16:19:42,988 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:42,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:42,988 INFO L85 PathProgramCache]: Analyzing trace with hash 259501145, now seen corresponding path program 2 times [2024-06-21 16:19:42,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:42,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547744085] [2024-06-21 16:19:42,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:42,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:43,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:43,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547744085] [2024-06-21 16:19:43,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547744085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:43,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:43,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:19:43,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172511280] [2024-06-21 16:19:43,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:43,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:19:43,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:43,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:19:43,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:19:43,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:43,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 288 transitions, 2256 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:19:43,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:43,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:43,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:44,418 INFO L124 PetriNetUnfolderBase]: 844/1487 cut-off events. [2024-06-21 16:19:44,418 INFO L125 PetriNetUnfolderBase]: For 223125/223125 co-relation queries the response was YES. [2024-06-21 16:19:44,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10967 conditions, 1487 events. 844/1487 cut-off events. For 223125/223125 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7969 event pairs, 139 based on Foata normal form. 2/1488 useless extension candidates. Maximal degree in co-relation 10824. Up to 1408 conditions per place. [2024-06-21 16:19:44,433 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 289 selfloop transitions, 26 changer transitions 0/317 dead transitions. [2024-06-21 16:19:44,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 317 transitions, 3008 flow [2024-06-21 16:19:44,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:19:44,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:19:44,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 151 transitions. [2024-06-21 16:19:44,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629807692307692 [2024-06-21 16:19:44,435 INFO L175 Difference]: Start difference. First operand has 307 places, 288 transitions, 2256 flow. Second operand 13 states and 151 transitions. [2024-06-21 16:19:44,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 317 transitions, 3008 flow [2024-06-21 16:19:45,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 317 transitions, 2882 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-06-21 16:19:45,660 INFO L231 Difference]: Finished difference. Result has 310 places, 289 transitions, 2232 flow [2024-06-21 16:19:45,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2232, PETRI_PLACES=310, PETRI_TRANSITIONS=289} [2024-06-21 16:19:45,661 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 279 predicate places. [2024-06-21 16:19:45,661 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 289 transitions, 2232 flow [2024-06-21 16:19:45,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:19:45,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:45,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:45,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 16:19:45,661 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:45,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:45,662 INFO L85 PathProgramCache]: Analyzing trace with hash -535285012, now seen corresponding path program 1 times [2024-06-21 16:19:45,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:45,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688462475] [2024-06-21 16:19:45,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:45,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:46,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:46,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688462475] [2024-06-21 16:19:46,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688462475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:46,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:46,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:19:46,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793593245] [2024-06-21 16:19:46,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:46,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:19:46,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:46,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:19:46,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:19:46,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:46,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 289 transitions, 2232 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:19:46,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:46,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:46,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:47,046 INFO L124 PetriNetUnfolderBase]: 860/1513 cut-off events. [2024-06-21 16:19:47,047 INFO L125 PetriNetUnfolderBase]: For 245303/245303 co-relation queries the response was YES. [2024-06-21 16:19:47,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11473 conditions, 1513 events. 860/1513 cut-off events. For 245303/245303 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 8117 event pairs, 135 based on Foata normal form. 2/1514 useless extension candidates. Maximal degree in co-relation 11329. Up to 1411 conditions per place. [2024-06-21 16:19:47,063 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 291 selfloop transitions, 31 changer transitions 0/324 dead transitions. [2024-06-21 16:19:47,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 324 transitions, 3392 flow [2024-06-21 16:19:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:19:47,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:19:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 157 transitions. [2024-06-21 16:19:47,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37740384615384615 [2024-06-21 16:19:47,064 INFO L175 Difference]: Start difference. First operand has 310 places, 289 transitions, 2232 flow. Second operand 13 states and 157 transitions. [2024-06-21 16:19:47,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 324 transitions, 3392 flow [2024-06-21 16:19:48,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 324 transitions, 3308 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-21 16:19:48,021 INFO L231 Difference]: Finished difference. Result has 312 places, 293 transitions, 2419 flow [2024-06-21 16:19:48,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2148, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2419, PETRI_PLACES=312, PETRI_TRANSITIONS=293} [2024-06-21 16:19:48,021 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 281 predicate places. [2024-06-21 16:19:48,021 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 293 transitions, 2419 flow [2024-06-21 16:19:48,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:19:48,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:48,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:48,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 16:19:48,022 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:48,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:48,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2035306093, now seen corresponding path program 3 times [2024-06-21 16:19:48,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:48,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750131464] [2024-06-21 16:19:48,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:48,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:48,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:48,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750131464] [2024-06-21 16:19:48,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750131464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:48,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:48,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:19:48,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885179336] [2024-06-21 16:19:48,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:48,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:19:48,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:48,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:19:48,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:19:49,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:49,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 293 transitions, 2419 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:19:49,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:49,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:49,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:49,599 INFO L124 PetriNetUnfolderBase]: 864/1521 cut-off events. [2024-06-21 16:19:49,599 INFO L125 PetriNetUnfolderBase]: For 250381/250381 co-relation queries the response was YES. [2024-06-21 16:19:49,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11596 conditions, 1521 events. 864/1521 cut-off events. For 250381/250381 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 8175 event pairs, 129 based on Foata normal form. 2/1522 useless extension candidates. Maximal degree in co-relation 11451. Up to 1323 conditions per place. [2024-06-21 16:19:49,615 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 298 selfloop transitions, 31 changer transitions 0/331 dead transitions. [2024-06-21 16:19:49,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 331 transitions, 3557 flow [2024-06-21 16:19:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:19:49,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:19:49,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 161 transitions. [2024-06-21 16:19:49,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870192307692308 [2024-06-21 16:19:49,616 INFO L175 Difference]: Start difference. First operand has 312 places, 293 transitions, 2419 flow. Second operand 13 states and 161 transitions. [2024-06-21 16:19:49,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 331 transitions, 3557 flow [2024-06-21 16:19:50,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 331 transitions, 3425 flow, removed 51 selfloop flow, removed 9 redundant places. [2024-06-21 16:19:50,728 INFO L231 Difference]: Finished difference. Result has 316 places, 294 transitions, 2393 flow [2024-06-21 16:19:50,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2393, PETRI_PLACES=316, PETRI_TRANSITIONS=294} [2024-06-21 16:19:50,728 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 285 predicate places. [2024-06-21 16:19:50,728 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 294 transitions, 2393 flow [2024-06-21 16:19:50,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:19:50,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:50,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:50,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 16:19:50,729 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:50,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:50,729 INFO L85 PathProgramCache]: Analyzing trace with hash 346337260, now seen corresponding path program 2 times [2024-06-21 16:19:50,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:50,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510785885] [2024-06-21 16:19:50,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:50,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:51,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:51,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510785885] [2024-06-21 16:19:51,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510785885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:51,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:51,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:19:51,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319892746] [2024-06-21 16:19:51,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:51,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:19:51,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:51,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:19:51,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:19:51,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:51,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 294 transitions, 2393 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:19:51,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:51,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:51,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:52,292 INFO L124 PetriNetUnfolderBase]: 873/1536 cut-off events. [2024-06-21 16:19:52,292 INFO L125 PetriNetUnfolderBase]: For 256799/256799 co-relation queries the response was YES. [2024-06-21 16:19:52,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11735 conditions, 1536 events. 873/1536 cut-off events. For 256799/256799 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 8262 event pairs, 135 based on Foata normal form. 2/1537 useless extension candidates. Maximal degree in co-relation 11588. Up to 1463 conditions per place. [2024-06-21 16:19:52,309 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 298 selfloop transitions, 25 changer transitions 0/325 dead transitions. [2024-06-21 16:19:52,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 325 transitions, 3235 flow [2024-06-21 16:19:52,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:19:52,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:19:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 149 transitions. [2024-06-21 16:19:52,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3581730769230769 [2024-06-21 16:19:52,311 INFO L175 Difference]: Start difference. First operand has 316 places, 294 transitions, 2393 flow. Second operand 13 states and 149 transitions. [2024-06-21 16:19:52,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 325 transitions, 3235 flow [2024-06-21 16:19:53,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 325 transitions, 3133 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-21 16:19:53,503 INFO L231 Difference]: Finished difference. Result has 319 places, 298 transitions, 2478 flow [2024-06-21 16:19:53,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2295, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2478, PETRI_PLACES=319, PETRI_TRANSITIONS=298} [2024-06-21 16:19:53,504 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 288 predicate places. [2024-06-21 16:19:53,504 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 298 transitions, 2478 flow [2024-06-21 16:19:53,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:19:53,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:53,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:53,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 16:19:53,504 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:53,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:53,505 INFO L85 PathProgramCache]: Analyzing trace with hash -243449967, now seen corresponding path program 4 times [2024-06-21 16:19:53,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:53,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066239768] [2024-06-21 16:19:53,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:53,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:54,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:54,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066239768] [2024-06-21 16:19:54,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066239768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:54,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:54,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:19:54,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538825787] [2024-06-21 16:19:54,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:54,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:19:54,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:54,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:19:54,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:19:54,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:54,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 298 transitions, 2478 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:19:54,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:54,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:54,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:55,270 INFO L124 PetriNetUnfolderBase]: 861/1516 cut-off events. [2024-06-21 16:19:55,270 INFO L125 PetriNetUnfolderBase]: For 261039/261039 co-relation queries the response was YES. [2024-06-21 16:19:55,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10233 conditions, 1516 events. 861/1516 cut-off events. For 261039/261039 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 8190 event pairs, 121 based on Foata normal form. 14/1529 useless extension candidates. Maximal degree in co-relation 10084. Up to 1391 conditions per place. [2024-06-21 16:19:55,288 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 297 selfloop transitions, 19 changer transitions 12/330 dead transitions. [2024-06-21 16:19:55,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 330 transitions, 3370 flow [2024-06-21 16:19:55,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:19:55,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:19:55,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-06-21 16:19:55,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3776041666666667 [2024-06-21 16:19:55,289 INFO L175 Difference]: Start difference. First operand has 319 places, 298 transitions, 2478 flow. Second operand 12 states and 145 transitions. [2024-06-21 16:19:55,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 330 transitions, 3370 flow [2024-06-21 16:19:56,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 330 transitions, 3231 flow, removed 46 selfloop flow, removed 11 redundant places. [2024-06-21 16:19:56,123 INFO L231 Difference]: Finished difference. Result has 320 places, 294 transitions, 2381 flow [2024-06-21 16:19:56,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2339, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2381, PETRI_PLACES=320, PETRI_TRANSITIONS=294} [2024-06-21 16:19:56,124 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 289 predicate places. [2024-06-21 16:19:56,124 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 294 transitions, 2381 flow [2024-06-21 16:19:56,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:19:56,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:56,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:56,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 16:19:56,124 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:56,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:56,125 INFO L85 PathProgramCache]: Analyzing trace with hash 2122001623, now seen corresponding path program 5 times [2024-06-21 16:19:56,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:56,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256684900] [2024-06-21 16:19:56,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:56,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:57,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:57,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256684900] [2024-06-21 16:19:57,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256684900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:57,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:57,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:19:57,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464498788] [2024-06-21 16:19:57,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:57,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:19:57,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:57,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:19:57,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:19:57,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:57,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 294 transitions, 2381 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:19:57,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:57,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:57,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:57,777 INFO L124 PetriNetUnfolderBase]: 824/1445 cut-off events. [2024-06-21 16:19:57,777 INFO L125 PetriNetUnfolderBase]: For 169550/169550 co-relation queries the response was YES. [2024-06-21 16:19:57,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9406 conditions, 1445 events. 824/1445 cut-off events. For 169550/169550 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 7768 event pairs, 116 based on Foata normal form. 2/1446 useless extension candidates. Maximal degree in co-relation 9257. Up to 1380 conditions per place. [2024-06-21 16:19:57,792 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 294 selfloop transitions, 22 changer transitions 0/318 dead transitions. [2024-06-21 16:19:57,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 318 transitions, 3079 flow [2024-06-21 16:19:57,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:19:57,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:19:57,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-21 16:19:57,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3567708333333333 [2024-06-21 16:19:57,794 INFO L175 Difference]: Start difference. First operand has 320 places, 294 transitions, 2381 flow. Second operand 12 states and 137 transitions. [2024-06-21 16:19:57,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 318 transitions, 3079 flow [2024-06-21 16:19:58,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 318 transitions, 2963 flow, removed 35 selfloop flow, removed 11 redundant places. [2024-06-21 16:19:58,482 INFO L231 Difference]: Finished difference. Result has 320 places, 294 transitions, 2313 flow [2024-06-21 16:19:58,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2265, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2313, PETRI_PLACES=320, PETRI_TRANSITIONS=294} [2024-06-21 16:19:58,483 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 289 predicate places. [2024-06-21 16:19:58,483 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 294 transitions, 2313 flow [2024-06-21 16:19:58,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:19:58,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:58,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:58,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 16:19:58,484 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:19:58,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:58,484 INFO L85 PathProgramCache]: Analyzing trace with hash -243593962, now seen corresponding path program 3 times [2024-06-21 16:19:58,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:58,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568887449] [2024-06-21 16:19:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:58,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:59,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:59,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:59,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568887449] [2024-06-21 16:19:59,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568887449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:59,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:59,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:19:59,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608472574] [2024-06-21 16:19:59,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:59,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:19:59,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:59,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:19:59,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:19:59,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:19:59,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 294 transitions, 2313 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:19:59,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:59,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:19:59,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:00,262 INFO L124 PetriNetUnfolderBase]: 820/1439 cut-off events. [2024-06-21 16:20:00,263 INFO L125 PetriNetUnfolderBase]: For 156828/156828 co-relation queries the response was YES. [2024-06-21 16:20:00,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8967 conditions, 1439 events. 820/1439 cut-off events. For 156828/156828 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 7752 event pairs, 115 based on Foata normal form. 2/1440 useless extension candidates. Maximal degree in co-relation 8817. Up to 1368 conditions per place. [2024-06-21 16:20:00,277 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 293 selfloop transitions, 24 changer transitions 0/319 dead transitions. [2024-06-21 16:20:00,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 319 transitions, 3019 flow [2024-06-21 16:20:00,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:20:00,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:20:00,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-21 16:20:00,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3645833333333333 [2024-06-21 16:20:00,279 INFO L175 Difference]: Start difference. First operand has 320 places, 294 transitions, 2313 flow. Second operand 12 states and 140 transitions. [2024-06-21 16:20:00,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 319 transitions, 3019 flow [2024-06-21 16:20:01,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 319 transitions, 2874 flow, removed 44 selfloop flow, removed 12 redundant places. [2024-06-21 16:20:01,107 INFO L231 Difference]: Finished difference. Result has 320 places, 294 transitions, 2221 flow [2024-06-21 16:20:01,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2221, PETRI_PLACES=320, PETRI_TRANSITIONS=294} [2024-06-21 16:20:01,108 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 289 predicate places. [2024-06-21 16:20:01,108 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 294 transitions, 2221 flow [2024-06-21 16:20:01,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:01,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:01,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:01,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 16:20:01,109 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:01,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:01,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1406782608, now seen corresponding path program 1 times [2024-06-21 16:20:01,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:01,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404589692] [2024-06-21 16:20:01,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:01,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:02,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:02,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404589692] [2024-06-21 16:20:02,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404589692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:02,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:02,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:02,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027354838] [2024-06-21 16:20:02,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:02,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:02,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:02,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:02,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:02,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:02,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 294 transitions, 2221 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:02,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:02,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:02,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:02,806 INFO L124 PetriNetUnfolderBase]: 824/1447 cut-off events. [2024-06-21 16:20:02,807 INFO L125 PetriNetUnfolderBase]: For 157611/157611 co-relation queries the response was YES. [2024-06-21 16:20:02,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8876 conditions, 1447 events. 824/1447 cut-off events. For 157611/157611 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 7821 event pairs, 73 based on Foata normal form. 2/1448 useless extension candidates. Maximal degree in co-relation 8726. Up to 1142 conditions per place. [2024-06-21 16:20:02,821 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 239 selfloop transitions, 81 changer transitions 0/322 dead transitions. [2024-06-21 16:20:02,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 322 transitions, 3032 flow [2024-06-21 16:20:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:20:02,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:20:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 16:20:02,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-21 16:20:02,822 INFO L175 Difference]: Start difference. First operand has 320 places, 294 transitions, 2221 flow. Second operand 11 states and 139 transitions. [2024-06-21 16:20:02,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 322 transitions, 3032 flow [2024-06-21 16:20:03,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 322 transitions, 2961 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 16:20:03,550 INFO L231 Difference]: Finished difference. Result has 321 places, 297 transitions, 2380 flow [2024-06-21 16:20:03,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2380, PETRI_PLACES=321, PETRI_TRANSITIONS=297} [2024-06-21 16:20:03,550 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 290 predicate places. [2024-06-21 16:20:03,550 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 297 transitions, 2380 flow [2024-06-21 16:20:03,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:03,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:03,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:03,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 16:20:03,551 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:03,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:03,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1406567282, now seen corresponding path program 4 times [2024-06-21 16:20:03,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:03,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988277753] [2024-06-21 16:20:03,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:03,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:04,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:04,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988277753] [2024-06-21 16:20:04,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988277753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:04,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:04,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:04,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069193885] [2024-06-21 16:20:04,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:04,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:04,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:04,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:04,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:04,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:04,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 297 transitions, 2380 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:04,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:04,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:04,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:05,097 INFO L124 PetriNetUnfolderBase]: 830/1457 cut-off events. [2024-06-21 16:20:05,097 INFO L125 PetriNetUnfolderBase]: For 162673/162673 co-relation queries the response was YES. [2024-06-21 16:20:05,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9251 conditions, 1457 events. 830/1457 cut-off events. For 162673/162673 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 7854 event pairs, 57 based on Foata normal form. 2/1458 useless extension candidates. Maximal degree in co-relation 9099. Up to 899 conditions per place. [2024-06-21 16:20:05,113 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 205 selfloop transitions, 126 changer transitions 0/333 dead transitions. [2024-06-21 16:20:05,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 333 transitions, 3672 flow [2024-06-21 16:20:05,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:20:05,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:20:05,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 168 transitions. [2024-06-21 16:20:05,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-06-21 16:20:05,114 INFO L175 Difference]: Start difference. First operand has 321 places, 297 transitions, 2380 flow. Second operand 13 states and 168 transitions. [2024-06-21 16:20:05,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 333 transitions, 3672 flow [2024-06-21 16:20:05,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 333 transitions, 3468 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 16:20:05,792 INFO L231 Difference]: Finished difference. Result has 327 places, 301 transitions, 2676 flow [2024-06-21 16:20:05,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2676, PETRI_PLACES=327, PETRI_TRANSITIONS=301} [2024-06-21 16:20:05,793 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 296 predicate places. [2024-06-21 16:20:05,793 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 301 transitions, 2676 flow [2024-06-21 16:20:05,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:05,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:05,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:05,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 16:20:05,793 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:05,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:05,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1406567127, now seen corresponding path program 6 times [2024-06-21 16:20:05,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:05,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251147437] [2024-06-21 16:20:05,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:05,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:06,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:06,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251147437] [2024-06-21 16:20:06,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251147437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:06,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:06,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:06,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431280544] [2024-06-21 16:20:06,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:06,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:06,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:06,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:06,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:06,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:06,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 301 transitions, 2676 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:06,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:06,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:06,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:07,488 INFO L124 PetriNetUnfolderBase]: 854/1509 cut-off events. [2024-06-21 16:20:07,488 INFO L125 PetriNetUnfolderBase]: For 252772/252772 co-relation queries the response was YES. [2024-06-21 16:20:07,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9952 conditions, 1509 events. 854/1509 cut-off events. For 252772/252772 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 8280 event pairs, 77 based on Foata normal form. 14/1522 useless extension candidates. Maximal degree in co-relation 9798. Up to 948 conditions per place. [2024-06-21 16:20:07,505 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 219 selfloop transitions, 105 changer transitions 11/337 dead transitions. [2024-06-21 16:20:07,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 337 transitions, 3738 flow [2024-06-21 16:20:07,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:20:07,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:20:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 161 transitions. [2024-06-21 16:20:07,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4192708333333333 [2024-06-21 16:20:07,506 INFO L175 Difference]: Start difference. First operand has 327 places, 301 transitions, 2676 flow. Second operand 12 states and 161 transitions. [2024-06-21 16:20:07,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 337 transitions, 3738 flow [2024-06-21 16:20:08,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 337 transitions, 3537 flow, removed 50 selfloop flow, removed 9 redundant places. [2024-06-21 16:20:08,175 INFO L231 Difference]: Finished difference. Result has 330 places, 299 transitions, 2719 flow [2024-06-21 16:20:08,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2719, PETRI_PLACES=330, PETRI_TRANSITIONS=299} [2024-06-21 16:20:08,175 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 299 predicate places. [2024-06-21 16:20:08,175 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 299 transitions, 2719 flow [2024-06-21 16:20:08,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:08,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:08,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:08,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 16:20:08,176 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:08,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:08,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1401204747, now seen corresponding path program 7 times [2024-06-21 16:20:08,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:08,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174330785] [2024-06-21 16:20:08,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:08,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:08,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:08,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174330785] [2024-06-21 16:20:08,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174330785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:08,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:08,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:08,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281399330] [2024-06-21 16:20:08,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:08,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:08,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:08,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:08,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:09,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:09,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 299 transitions, 2719 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:09,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:09,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:09,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:09,492 INFO L124 PetriNetUnfolderBase]: 865/1542 cut-off events. [2024-06-21 16:20:09,492 INFO L125 PetriNetUnfolderBase]: For 257844/257844 co-relation queries the response was YES. [2024-06-21 16:20:09,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10325 conditions, 1542 events. 865/1542 cut-off events. For 257844/257844 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 8532 event pairs, 83 based on Foata normal form. 14/1555 useless extension candidates. Maximal degree in co-relation 10169. Up to 985 conditions per place. [2024-06-21 16:20:09,509 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 221 selfloop transitions, 103 changer transitions 12/338 dead transitions. [2024-06-21 16:20:09,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 338 transitions, 3803 flow [2024-06-21 16:20:09,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:20:09,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:20:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 163 transitions. [2024-06-21 16:20:09,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4244791666666667 [2024-06-21 16:20:09,510 INFO L175 Difference]: Start difference. First operand has 330 places, 299 transitions, 2719 flow. Second operand 12 states and 163 transitions. [2024-06-21 16:20:09,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 338 transitions, 3803 flow [2024-06-21 16:20:10,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 338 transitions, 3577 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-21 16:20:10,333 INFO L231 Difference]: Finished difference. Result has 333 places, 300 transitions, 2758 flow [2024-06-21 16:20:10,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2493, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2758, PETRI_PLACES=333, PETRI_TRANSITIONS=300} [2024-06-21 16:20:10,333 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 302 predicate places. [2024-06-21 16:20:10,333 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 300 transitions, 2758 flow [2024-06-21 16:20:10,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:10,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:10,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:10,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 16:20:10,334 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:10,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:10,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1401204902, now seen corresponding path program 5 times [2024-06-21 16:20:10,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:10,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031557728] [2024-06-21 16:20:10,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:10,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:11,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:11,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031557728] [2024-06-21 16:20:11,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031557728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:11,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:11,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:11,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120842228] [2024-06-21 16:20:11,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:11,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:11,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:11,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:11,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:11,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:11,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 300 transitions, 2758 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:11,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:11,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:11,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:11,786 INFO L124 PetriNetUnfolderBase]: 859/1532 cut-off events. [2024-06-21 16:20:11,786 INFO L125 PetriNetUnfolderBase]: For 176108/176108 co-relation queries the response was YES. [2024-06-21 16:20:11,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10362 conditions, 1532 events. 859/1532 cut-off events. For 176108/176108 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 8455 event pairs, 73 based on Foata normal form. 2/1533 useless extension candidates. Maximal degree in co-relation 10204. Up to 978 conditions per place. [2024-06-21 16:20:11,803 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 207 selfloop transitions, 120 changer transitions 5/334 dead transitions. [2024-06-21 16:20:11,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 334 transitions, 4014 flow [2024-06-21 16:20:11,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:20:11,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:20:11,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 160 transitions. [2024-06-21 16:20:11,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 16:20:11,805 INFO L175 Difference]: Start difference. First operand has 333 places, 300 transitions, 2758 flow. Second operand 12 states and 160 transitions. [2024-06-21 16:20:11,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 334 transitions, 4014 flow [2024-06-21 16:20:12,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 334 transitions, 3793 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 16:20:12,689 INFO L231 Difference]: Finished difference. Result has 336 places, 302 transitions, 2894 flow [2024-06-21 16:20:12,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2537, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2894, PETRI_PLACES=336, PETRI_TRANSITIONS=302} [2024-06-21 16:20:12,690 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 305 predicate places. [2024-06-21 16:20:12,690 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 302 transitions, 2894 flow [2024-06-21 16:20:12,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:12,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:12,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:12,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 16:20:12,691 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:12,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:12,691 INFO L85 PathProgramCache]: Analyzing trace with hash -374751791, now seen corresponding path program 8 times [2024-06-21 16:20:12,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:12,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398214285] [2024-06-21 16:20:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:12,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:13,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:13,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398214285] [2024-06-21 16:20:13,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398214285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:13,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:13,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:13,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921103863] [2024-06-21 16:20:13,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:13,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:13,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:13,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:13,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:13,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:13,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 302 transitions, 2894 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:13,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:13,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:13,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:14,285 INFO L124 PetriNetUnfolderBase]: 870/1553 cut-off events. [2024-06-21 16:20:14,285 INFO L125 PetriNetUnfolderBase]: For 196305/196305 co-relation queries the response was YES. [2024-06-21 16:20:14,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10961 conditions, 1553 events. 870/1553 cut-off events. For 196305/196305 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 8659 event pairs, 72 based on Foata normal form. 2/1554 useless extension candidates. Maximal degree in co-relation 10802. Up to 938 conditions per place. [2024-06-21 16:20:14,302 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 219 selfloop transitions, 111 changer transitions 6/338 dead transitions. [2024-06-21 16:20:14,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 338 transitions, 4158 flow [2024-06-21 16:20:14,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:20:14,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:20:14,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 161 transitions. [2024-06-21 16:20:14,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4192708333333333 [2024-06-21 16:20:14,304 INFO L175 Difference]: Start difference. First operand has 336 places, 302 transitions, 2894 flow. Second operand 12 states and 161 transitions. [2024-06-21 16:20:14,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 338 transitions, 4158 flow [2024-06-21 16:20:15,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 338 transitions, 3888 flow, removed 52 selfloop flow, removed 9 redundant places. [2024-06-21 16:20:15,273 INFO L231 Difference]: Finished difference. Result has 340 places, 304 transitions, 2962 flow [2024-06-21 16:20:15,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2624, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2962, PETRI_PLACES=340, PETRI_TRANSITIONS=304} [2024-06-21 16:20:15,273 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 309 predicate places. [2024-06-21 16:20:15,274 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 304 transitions, 2962 flow [2024-06-21 16:20:15,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:15,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:15,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:15,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 16:20:15,274 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:15,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:15,275 INFO L85 PathProgramCache]: Analyzing trace with hash -374747916, now seen corresponding path program 6 times [2024-06-21 16:20:15,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:15,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301151773] [2024-06-21 16:20:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:15,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:15,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:16,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:16,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301151773] [2024-06-21 16:20:16,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301151773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:16,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:16,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:16,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693754134] [2024-06-21 16:20:16,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:16,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:16,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:16,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:16,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:16,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:16,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 304 transitions, 2962 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:16,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:16,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:16,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:16,805 INFO L124 PetriNetUnfolderBase]: 876/1563 cut-off events. [2024-06-21 16:20:16,805 INFO L125 PetriNetUnfolderBase]: For 201440/201440 co-relation queries the response was YES. [2024-06-21 16:20:16,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11157 conditions, 1563 events. 876/1563 cut-off events. For 201440/201440 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 8679 event pairs, 76 based on Foata normal form. 2/1564 useless extension candidates. Maximal degree in co-relation 10996. Up to 980 conditions per place. [2024-06-21 16:20:16,822 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 205 selfloop transitions, 127 changer transitions 2/336 dead transitions. [2024-06-21 16:20:16,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 336 transitions, 4184 flow [2024-06-21 16:20:16,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:20:16,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:20:16,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 161 transitions. [2024-06-21 16:20:16,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4192708333333333 [2024-06-21 16:20:16,823 INFO L175 Difference]: Start difference. First operand has 340 places, 304 transitions, 2962 flow. Second operand 12 states and 161 transitions. [2024-06-21 16:20:16,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 336 transitions, 4184 flow [2024-06-21 16:20:17,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 336 transitions, 3910 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-21 16:20:17,699 INFO L231 Difference]: Finished difference. Result has 343 places, 306 transitions, 3063 flow [2024-06-21 16:20:17,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3063, PETRI_PLACES=343, PETRI_TRANSITIONS=306} [2024-06-21 16:20:17,700 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 312 predicate places. [2024-06-21 16:20:17,700 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 306 transitions, 3063 flow [2024-06-21 16:20:17,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:17,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:17,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:17,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 16:20:17,701 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:17,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:17,701 INFO L85 PathProgramCache]: Analyzing trace with hash -374748071, now seen corresponding path program 9 times [2024-06-21 16:20:17,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:17,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121193953] [2024-06-21 16:20:17,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:17,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:18,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:18,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121193953] [2024-06-21 16:20:18,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121193953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:18,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:18,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:18,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775033837] [2024-06-21 16:20:18,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:18,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:18,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:18,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:18,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:18,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:18,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 306 transitions, 3063 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:18,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:18,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:18,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:19,173 INFO L124 PetriNetUnfolderBase]: 873/1558 cut-off events. [2024-06-21 16:20:19,173 INFO L125 PetriNetUnfolderBase]: For 187359/187359 co-relation queries the response was YES. [2024-06-21 16:20:19,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10832 conditions, 1558 events. 873/1558 cut-off events. For 187359/187359 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 8691 event pairs, 79 based on Foata normal form. 2/1559 useless extension candidates. Maximal degree in co-relation 10670. Up to 998 conditions per place. [2024-06-21 16:20:19,187 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 221 selfloop transitions, 110 changer transitions 9/342 dead transitions. [2024-06-21 16:20:19,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 342 transitions, 4057 flow [2024-06-21 16:20:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:20:19,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:20:19,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 170 transitions. [2024-06-21 16:20:19,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40865384615384615 [2024-06-21 16:20:19,189 INFO L175 Difference]: Start difference. First operand has 343 places, 306 transitions, 3063 flow. Second operand 13 states and 170 transitions. [2024-06-21 16:20:19,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 342 transitions, 4057 flow [2024-06-21 16:20:20,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 342 transitions, 3613 flow, removed 58 selfloop flow, removed 12 redundant places. [2024-06-21 16:20:20,011 INFO L231 Difference]: Finished difference. Result has 344 places, 306 transitions, 2845 flow [2024-06-21 16:20:20,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2619, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2845, PETRI_PLACES=344, PETRI_TRANSITIONS=306} [2024-06-21 16:20:20,012 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 313 predicate places. [2024-06-21 16:20:20,012 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 306 transitions, 2845 flow [2024-06-21 16:20:20,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:20,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:20,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:20,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 16:20:20,013 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:20,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:20,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1846990110, now seen corresponding path program 2 times [2024-06-21 16:20:20,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:20,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795160652] [2024-06-21 16:20:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:20,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:21,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:21,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795160652] [2024-06-21 16:20:21,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795160652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:21,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:21,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:21,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115575856] [2024-06-21 16:20:21,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:21,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:21,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:21,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:21,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:21,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:21,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 306 transitions, 2845 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:21,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:21,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:21,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:21,682 INFO L124 PetriNetUnfolderBase]: 883/1576 cut-off events. [2024-06-21 16:20:21,682 INFO L125 PetriNetUnfolderBase]: For 186951/186951 co-relation queries the response was YES. [2024-06-21 16:20:21,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10636 conditions, 1576 events. 883/1576 cut-off events. For 186951/186951 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 8818 event pairs, 101 based on Foata normal form. 2/1577 useless extension candidates. Maximal degree in co-relation 10474. Up to 1267 conditions per place. [2024-06-21 16:20:21,700 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 261 selfloop transitions, 71 changer transitions 0/334 dead transitions. [2024-06-21 16:20:21,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 334 transitions, 3717 flow [2024-06-21 16:20:21,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:20:21,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:20:21,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 16:20:21,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38920454545454547 [2024-06-21 16:20:21,701 INFO L175 Difference]: Start difference. First operand has 344 places, 306 transitions, 2845 flow. Second operand 11 states and 137 transitions. [2024-06-21 16:20:21,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 334 transitions, 3717 flow [2024-06-21 16:20:22,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 334 transitions, 3489 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-21 16:20:22,767 INFO L231 Difference]: Finished difference. Result has 344 places, 312 transitions, 2870 flow [2024-06-21 16:20:22,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2619, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2870, PETRI_PLACES=344, PETRI_TRANSITIONS=312} [2024-06-21 16:20:22,767 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 313 predicate places. [2024-06-21 16:20:22,767 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 312 transitions, 2870 flow [2024-06-21 16:20:22,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:22,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:22,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:22,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 16:20:22,768 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:22,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:22,768 INFO L85 PathProgramCache]: Analyzing trace with hash 664759208, now seen corresponding path program 3 times [2024-06-21 16:20:22,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:22,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578204518] [2024-06-21 16:20:22,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:22,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:23,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:23,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578204518] [2024-06-21 16:20:23,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578204518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:23,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:23,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:20:23,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716759815] [2024-06-21 16:20:23,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:23,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:20:23,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:23,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:20:23,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:20:23,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:23,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 312 transitions, 2870 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:23,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:23,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:23,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:24,191 INFO L124 PetriNetUnfolderBase]: 887/1584 cut-off events. [2024-06-21 16:20:24,191 INFO L125 PetriNetUnfolderBase]: For 189473/189473 co-relation queries the response was YES. [2024-06-21 16:20:24,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10604 conditions, 1584 events. 887/1584 cut-off events. For 189473/189473 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 8861 event pairs, 97 based on Foata normal form. 2/1585 useless extension candidates. Maximal degree in co-relation 10440. Up to 1275 conditions per place. [2024-06-21 16:20:24,209 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 265 selfloop transitions, 70 changer transitions 0/337 dead transitions. [2024-06-21 16:20:24,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 337 transitions, 3727 flow [2024-06-21 16:20:24,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:20:24,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:20:24,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 16:20:24,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-21 16:20:24,210 INFO L175 Difference]: Start difference. First operand has 344 places, 312 transitions, 2870 flow. Second operand 11 states and 139 transitions. [2024-06-21 16:20:24,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 337 transitions, 3727 flow [2024-06-21 16:20:25,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 337 transitions, 3503 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-21 16:20:25,319 INFO L231 Difference]: Finished difference. Result has 350 places, 314 transitions, 2869 flow [2024-06-21 16:20:25,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2696, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2869, PETRI_PLACES=350, PETRI_TRANSITIONS=314} [2024-06-21 16:20:25,320 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 319 predicate places. [2024-06-21 16:20:25,320 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 314 transitions, 2869 flow [2024-06-21 16:20:25,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:25,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:25,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:25,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 16:20:25,321 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:25,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:25,321 INFO L85 PathProgramCache]: Analyzing trace with hash -2053916691, now seen corresponding path program 10 times [2024-06-21 16:20:25,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:25,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239864947] [2024-06-21 16:20:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:25,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:26,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:26,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239864947] [2024-06-21 16:20:26,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239864947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:26,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:26,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:26,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727048038] [2024-06-21 16:20:26,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:26,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:26,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:26,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:26,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:26,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:26,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 314 transitions, 2869 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:26,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:26,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:26,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:26,989 INFO L124 PetriNetUnfolderBase]: 911/1636 cut-off events. [2024-06-21 16:20:26,989 INFO L125 PetriNetUnfolderBase]: For 288832/288832 co-relation queries the response was YES. [2024-06-21 16:20:27,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10985 conditions, 1636 events. 911/1636 cut-off events. For 288832/288832 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 9268 event pairs, 91 based on Foata normal form. 14/1649 useless extension candidates. Maximal degree in co-relation 10819. Up to 1071 conditions per place. [2024-06-21 16:20:27,006 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 244 selfloop transitions, 92 changer transitions 11/349 dead transitions. [2024-06-21 16:20:27,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 349 transitions, 4043 flow [2024-06-21 16:20:27,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:20:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:20:27,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 162 transitions. [2024-06-21 16:20:27,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 16:20:27,007 INFO L175 Difference]: Start difference. First operand has 350 places, 314 transitions, 2869 flow. Second operand 12 states and 162 transitions. [2024-06-21 16:20:27,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 349 transitions, 4043 flow [2024-06-21 16:20:28,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 349 transitions, 3895 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 16:20:28,062 INFO L231 Difference]: Finished difference. Result has 354 places, 313 transitions, 2951 flow [2024-06-21 16:20:28,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2721, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2951, PETRI_PLACES=354, PETRI_TRANSITIONS=313} [2024-06-21 16:20:28,062 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 323 predicate places. [2024-06-21 16:20:28,063 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 313 transitions, 2951 flow [2024-06-21 16:20:28,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:28,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:28,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:28,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 16:20:28,063 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:28,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:28,063 INFO L85 PathProgramCache]: Analyzing trace with hash 753358222, now seen corresponding path program 7 times [2024-06-21 16:20:28,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:28,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46855317] [2024-06-21 16:20:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:28,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:28,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:28,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46855317] [2024-06-21 16:20:28,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46855317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:28,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:28,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:28,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296435483] [2024-06-21 16:20:28,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:28,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:28,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:28,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:28,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:29,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:29,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 313 transitions, 2951 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:29,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:29,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:29,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:29,553 INFO L124 PetriNetUnfolderBase]: 905/1626 cut-off events. [2024-06-21 16:20:29,554 INFO L125 PetriNetUnfolderBase]: For 198699/198699 co-relation queries the response was YES. [2024-06-21 16:20:29,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11097 conditions, 1626 events. 905/1626 cut-off events. For 198699/198699 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 9182 event pairs, 79 based on Foata normal form. 2/1627 useless extension candidates. Maximal degree in co-relation 10930. Up to 1064 conditions per place. [2024-06-21 16:20:29,571 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 232 selfloop transitions, 107 changer transitions 4/345 dead transitions. [2024-06-21 16:20:29,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 345 transitions, 4315 flow [2024-06-21 16:20:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:20:29,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:20:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 159 transitions. [2024-06-21 16:20:29,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140625 [2024-06-21 16:20:29,572 INFO L175 Difference]: Start difference. First operand has 354 places, 313 transitions, 2951 flow. Second operand 12 states and 159 transitions. [2024-06-21 16:20:29,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 345 transitions, 4315 flow [2024-06-21 16:20:30,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 345 transitions, 4107 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-21 16:20:30,591 INFO L231 Difference]: Finished difference. Result has 356 places, 315 transitions, 3082 flow [2024-06-21 16:20:30,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2743, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3082, PETRI_PLACES=356, PETRI_TRANSITIONS=315} [2024-06-21 16:20:30,592 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 325 predicate places. [2024-06-21 16:20:30,592 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 315 transitions, 3082 flow [2024-06-21 16:20:30,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:30,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:30,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:30,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 16:20:30,597 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:30,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:30,597 INFO L85 PathProgramCache]: Analyzing trace with hash 753214072, now seen corresponding path program 8 times [2024-06-21 16:20:30,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:30,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367521606] [2024-06-21 16:20:30,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:30,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:31,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:31,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367521606] [2024-06-21 16:20:31,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367521606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:31,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:31,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:31,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666209472] [2024-06-21 16:20:31,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:31,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:31,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:31,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:31,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:31,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:31,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 315 transitions, 3082 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:31,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:31,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:31,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:32,158 INFO L124 PetriNetUnfolderBase]: 921/1652 cut-off events. [2024-06-21 16:20:32,158 INFO L125 PetriNetUnfolderBase]: For 223507/223507 co-relation queries the response was YES. [2024-06-21 16:20:32,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11905 conditions, 1652 events. 921/1652 cut-off events. For 223507/223507 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 9378 event pairs, 92 based on Foata normal form. 2/1653 useless extension candidates. Maximal degree in co-relation 11737. Up to 1094 conditions per place. [2024-06-21 16:20:32,177 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 240 selfloop transitions, 105 changer transitions 6/353 dead transitions. [2024-06-21 16:20:32,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 353 transitions, 4610 flow [2024-06-21 16:20:32,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:20:32,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:20:32,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 177 transitions. [2024-06-21 16:20:32,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3950892857142857 [2024-06-21 16:20:32,178 INFO L175 Difference]: Start difference. First operand has 356 places, 315 transitions, 3082 flow. Second operand 14 states and 177 transitions. [2024-06-21 16:20:32,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 353 transitions, 4610 flow [2024-06-21 16:20:33,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 353 transitions, 4348 flow, removed 56 selfloop flow, removed 9 redundant places. [2024-06-21 16:20:33,260 INFO L231 Difference]: Finished difference. Result has 362 places, 319 transitions, 3288 flow [2024-06-21 16:20:33,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2822, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3288, PETRI_PLACES=362, PETRI_TRANSITIONS=319} [2024-06-21 16:20:33,260 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 331 predicate places. [2024-06-21 16:20:33,260 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 319 transitions, 3288 flow [2024-06-21 16:20:33,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:33,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:33,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:33,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 16:20:33,261 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:33,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:33,261 INFO L85 PathProgramCache]: Analyzing trace with hash -2054060841, now seen corresponding path program 11 times [2024-06-21 16:20:33,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:33,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709653317] [2024-06-21 16:20:33,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:33,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:34,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:34,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709653317] [2024-06-21 16:20:34,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709653317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:34,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:34,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:34,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809170581] [2024-06-21 16:20:34,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:34,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:34,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:34,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:34,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:34,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:34,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 319 transitions, 3288 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:34,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:34,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:34,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:34,799 INFO L124 PetriNetUnfolderBase]: 903/1614 cut-off events. [2024-06-21 16:20:34,799 INFO L125 PetriNetUnfolderBase]: For 225410/225410 co-relation queries the response was YES. [2024-06-21 16:20:34,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11687 conditions, 1614 events. 903/1614 cut-off events. For 225410/225410 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 9092 event pairs, 90 based on Foata normal form. 2/1615 useless extension candidates. Maximal degree in co-relation 11517. Up to 1081 conditions per place. [2024-06-21 16:20:34,819 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 242 selfloop transitions, 103 changer transitions 1/348 dead transitions. [2024-06-21 16:20:34,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 348 transitions, 4284 flow [2024-06-21 16:20:34,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:20:34,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:20:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 164 transitions. [2024-06-21 16:20:34,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942307692307692 [2024-06-21 16:20:34,820 INFO L175 Difference]: Start difference. First operand has 362 places, 319 transitions, 3288 flow. Second operand 13 states and 164 transitions. [2024-06-21 16:20:34,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 348 transitions, 4284 flow [2024-06-21 16:20:35,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 348 transitions, 4010 flow, removed 76 selfloop flow, removed 9 redundant places. [2024-06-21 16:20:35,755 INFO L231 Difference]: Finished difference. Result has 365 places, 320 transitions, 3286 flow [2024-06-21 16:20:35,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3014, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3286, PETRI_PLACES=365, PETRI_TRANSITIONS=320} [2024-06-21 16:20:35,756 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 334 predicate places. [2024-06-21 16:20:35,756 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 320 transitions, 3286 flow [2024-06-21 16:20:35,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:35,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:35,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:35,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 16:20:35,757 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:35,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:35,757 INFO L85 PathProgramCache]: Analyzing trace with hash -2054064561, now seen corresponding path program 12 times [2024-06-21 16:20:35,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:35,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81448194] [2024-06-21 16:20:35,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:35,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:36,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:36,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81448194] [2024-06-21 16:20:36,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81448194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:36,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:36,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:36,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456152006] [2024-06-21 16:20:36,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:36,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:36,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:36,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:36,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:36,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:36,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 320 transitions, 3286 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:36,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:36,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:36,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:37,338 INFO L124 PetriNetUnfolderBase]: 914/1635 cut-off events. [2024-06-21 16:20:37,338 INFO L125 PetriNetUnfolderBase]: For 246843/246843 co-relation queries the response was YES. [2024-06-21 16:20:37,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12295 conditions, 1635 events. 914/1635 cut-off events. For 246843/246843 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 9224 event pairs, 127 based on Foata normal form. 2/1636 useless extension candidates. Maximal degree in co-relation 12123. Up to 1389 conditions per place. [2024-06-21 16:20:37,356 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 281 selfloop transitions, 72 changer transitions 3/358 dead transitions. [2024-06-21 16:20:37,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 358 transitions, 4756 flow [2024-06-21 16:20:37,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:20:37,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:20:37,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 16:20:37,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802083333333333 [2024-06-21 16:20:37,357 INFO L175 Difference]: Start difference. First operand has 365 places, 320 transitions, 3286 flow. Second operand 12 states and 146 transitions. [2024-06-21 16:20:37,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 358 transitions, 4756 flow [2024-06-21 16:20:38,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 358 transitions, 4464 flow, removed 35 selfloop flow, removed 11 redundant places. [2024-06-21 16:20:38,415 INFO L231 Difference]: Finished difference. Result has 369 places, 332 transitions, 3558 flow [2024-06-21 16:20:38,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3026, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3558, PETRI_PLACES=369, PETRI_TRANSITIONS=332} [2024-06-21 16:20:38,415 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 338 predicate places. [2024-06-21 16:20:38,415 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 332 transitions, 3558 flow [2024-06-21 16:20:38,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:38,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:38,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:38,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 16:20:38,416 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:38,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:38,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2048338830, now seen corresponding path program 4 times [2024-06-21 16:20:38,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:38,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476359813] [2024-06-21 16:20:38,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:38,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:39,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:39,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476359813] [2024-06-21 16:20:39,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476359813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:39,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:39,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:39,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961002248] [2024-06-21 16:20:39,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:39,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:39,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:39,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:39,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:39,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:39,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 332 transitions, 3558 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:39,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:39,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:39,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:40,237 INFO L124 PetriNetUnfolderBase]: 874/1551 cut-off events. [2024-06-21 16:20:40,237 INFO L125 PetriNetUnfolderBase]: For 239988/239988 co-relation queries the response was YES. [2024-06-21 16:20:40,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11646 conditions, 1551 events. 874/1551 cut-off events. For 239988/239988 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 8665 event pairs, 79 based on Foata normal form. 2/1552 useless extension candidates. Maximal degree in co-relation 11470. Up to 1242 conditions per place. [2024-06-21 16:20:40,258 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 285 selfloop transitions, 69 changer transitions 0/356 dead transitions. [2024-06-21 16:20:40,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 356 transitions, 4403 flow [2024-06-21 16:20:40,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:20:40,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:20:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-21 16:20:40,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-21 16:20:40,260 INFO L175 Difference]: Start difference. First operand has 369 places, 332 transitions, 3558 flow. Second operand 11 states and 140 transitions. [2024-06-21 16:20:40,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 356 transitions, 4403 flow [2024-06-21 16:20:41,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 356 transitions, 4053 flow, removed 152 selfloop flow, removed 6 redundant places. [2024-06-21 16:20:41,257 INFO L231 Difference]: Finished difference. Result has 374 places, 333 transitions, 3408 flow [2024-06-21 16:20:41,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3252, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3408, PETRI_PLACES=374, PETRI_TRANSITIONS=333} [2024-06-21 16:20:41,259 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 343 predicate places. [2024-06-21 16:20:41,259 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 333 transitions, 3408 flow [2024-06-21 16:20:41,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:41,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:41,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:41,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 16:20:41,260 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:41,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:41,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2048554156, now seen corresponding path program 9 times [2024-06-21 16:20:41,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:41,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830284697] [2024-06-21 16:20:41,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:41,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:42,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:42,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830284697] [2024-06-21 16:20:42,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830284697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:42,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:42,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:42,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439518303] [2024-06-21 16:20:42,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:42,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:42,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:42,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:42,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:42,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:42,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 333 transitions, 3408 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:42,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:42,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:42,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:42,893 INFO L124 PetriNetUnfolderBase]: 880/1561 cut-off events. [2024-06-21 16:20:42,893 INFO L125 PetriNetUnfolderBase]: For 234575/234575 co-relation queries the response was YES. [2024-06-21 16:20:42,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11247 conditions, 1561 events. 880/1561 cut-off events. For 234575/234575 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 8697 event pairs, 69 based on Foata normal form. 2/1562 useless extension candidates. Maximal degree in co-relation 11071. Up to 1017 conditions per place. [2024-06-21 16:20:42,910 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 248 selfloop transitions, 113 changer transitions 0/363 dead transitions. [2024-06-21 16:20:42,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 363 transitions, 4595 flow [2024-06-21 16:20:42,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:20:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:20:42,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 170 transitions. [2024-06-21 16:20:42,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40865384615384615 [2024-06-21 16:20:42,911 INFO L175 Difference]: Start difference. First operand has 374 places, 333 transitions, 3408 flow. Second operand 13 states and 170 transitions. [2024-06-21 16:20:42,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 363 transitions, 4595 flow [2024-06-21 16:20:43,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 363 transitions, 4432 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 16:20:43,964 INFO L231 Difference]: Finished difference. Result has 377 places, 335 transitions, 3590 flow [2024-06-21 16:20:43,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3245, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3590, PETRI_PLACES=377, PETRI_TRANSITIONS=335} [2024-06-21 16:20:43,969 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 346 predicate places. [2024-06-21 16:20:43,970 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 335 transitions, 3590 flow [2024-06-21 16:20:43,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:43,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:43,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:43,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 16:20:43,970 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:43,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:43,970 INFO L85 PathProgramCache]: Analyzing trace with hash 845425510, now seen corresponding path program 5 times [2024-06-21 16:20:43,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:43,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726340704] [2024-06-21 16:20:43,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:43,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:45,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:45,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726340704] [2024-06-21 16:20:45,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726340704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:45,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:45,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:45,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37776811] [2024-06-21 16:20:45,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:45,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:45,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:45,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:45,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:45,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:45,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 335 transitions, 3590 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:45,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:45,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:45,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:45,646 INFO L124 PetriNetUnfolderBase]: 884/1569 cut-off events. [2024-06-21 16:20:45,646 INFO L125 PetriNetUnfolderBase]: For 238902/238902 co-relation queries the response was YES. [2024-06-21 16:20:45,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11383 conditions, 1569 events. 884/1569 cut-off events. For 238902/238902 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 8791 event pairs, 79 based on Foata normal form. 2/1570 useless extension candidates. Maximal degree in co-relation 11207. Up to 1228 conditions per place. [2024-06-21 16:20:45,663 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 280 selfloop transitions, 76 changer transitions 0/358 dead transitions. [2024-06-21 16:20:45,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 358 transitions, 4391 flow [2024-06-21 16:20:45,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:20:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:20:45,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 16:20:45,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38920454545454547 [2024-06-21 16:20:45,664 INFO L175 Difference]: Start difference. First operand has 377 places, 335 transitions, 3590 flow. Second operand 11 states and 137 transitions. [2024-06-21 16:20:45,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 358 transitions, 4391 flow [2024-06-21 16:20:46,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 358 transitions, 4133 flow, removed 51 selfloop flow, removed 10 redundant places. [2024-06-21 16:20:46,547 INFO L231 Difference]: Finished difference. Result has 378 places, 336 transitions, 3504 flow [2024-06-21 16:20:46,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3332, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3504, PETRI_PLACES=378, PETRI_TRANSITIONS=336} [2024-06-21 16:20:46,547 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 347 predicate places. [2024-06-21 16:20:46,547 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 336 transitions, 3504 flow [2024-06-21 16:20:46,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:46,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:46,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:46,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 16:20:46,548 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:46,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:46,548 INFO L85 PathProgramCache]: Analyzing trace with hash 664543882, now seen corresponding path program 10 times [2024-06-21 16:20:46,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:46,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032584097] [2024-06-21 16:20:46,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:46,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:47,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:47,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032584097] [2024-06-21 16:20:47,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032584097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:47,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:47,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:47,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272547609] [2024-06-21 16:20:47,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:47,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:47,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:47,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:47,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:47,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:47,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 336 transitions, 3504 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:47,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:47,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:47,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:48,308 INFO L124 PetriNetUnfolderBase]: 886/1573 cut-off events. [2024-06-21 16:20:48,308 INFO L125 PetriNetUnfolderBase]: For 221540/221540 co-relation queries the response was YES. [2024-06-21 16:20:48,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10915 conditions, 1573 events. 886/1573 cut-off events. For 221540/221540 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 8840 event pairs, 72 based on Foata normal form. 2/1574 useless extension candidates. Maximal degree in co-relation 10738. Up to 1070 conditions per place. [2024-06-21 16:20:48,323 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 258 selfloop transitions, 105 changer transitions 0/365 dead transitions. [2024-06-21 16:20:48,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 365 transitions, 4337 flow [2024-06-21 16:20:48,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:20:48,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:20:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 165 transitions. [2024-06-21 16:20:48,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39663461538461536 [2024-06-21 16:20:48,325 INFO L175 Difference]: Start difference. First operand has 378 places, 336 transitions, 3504 flow. Second operand 13 states and 165 transitions. [2024-06-21 16:20:48,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 365 transitions, 4337 flow [2024-06-21 16:20:49,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 365 transitions, 4083 flow, removed 52 selfloop flow, removed 9 redundant places. [2024-06-21 16:20:49,211 INFO L231 Difference]: Finished difference. Result has 383 places, 339 transitions, 3503 flow [2024-06-21 16:20:49,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3250, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3503, PETRI_PLACES=383, PETRI_TRANSITIONS=339} [2024-06-21 16:20:49,211 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 352 predicate places. [2024-06-21 16:20:49,212 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 339 transitions, 3503 flow [2024-06-21 16:20:49,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:49,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:49,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:49,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 16:20:49,212 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:49,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:49,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1875306619, now seen corresponding path program 13 times [2024-06-21 16:20:49,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:49,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746548254] [2024-06-21 16:20:49,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:49,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:50,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:50,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746548254] [2024-06-21 16:20:50,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746548254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:50,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:50,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:50,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809096306] [2024-06-21 16:20:50,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:50,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:50,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:50,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:50,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:50,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:50,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 339 transitions, 3503 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:50,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:50,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:50,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:50,876 INFO L124 PetriNetUnfolderBase]: 910/1625 cut-off events. [2024-06-21 16:20:50,876 INFO L125 PetriNetUnfolderBase]: For 333921/333921 co-relation queries the response was YES. [2024-06-21 16:20:50,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11302 conditions, 1625 events. 910/1625 cut-off events. For 333921/333921 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 9196 event pairs, 84 based on Foata normal form. 14/1638 useless extension candidates. Maximal degree in co-relation 11123. Up to 1074 conditions per place. [2024-06-21 16:20:50,898 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 261 selfloop transitions, 94 changer transitions 13/370 dead transitions. [2024-06-21 16:20:50,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 370 transitions, 4499 flow [2024-06-21 16:20:50,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:20:50,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:20:50,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 163 transitions. [2024-06-21 16:20:50,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4244791666666667 [2024-06-21 16:20:50,899 INFO L175 Difference]: Start difference. First operand has 383 places, 339 transitions, 3503 flow. Second operand 12 states and 163 transitions. [2024-06-21 16:20:50,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 370 transitions, 4499 flow [2024-06-21 16:20:51,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 370 transitions, 4258 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 16:20:51,838 INFO L231 Difference]: Finished difference. Result has 384 places, 334 transitions, 3449 flow [2024-06-21 16:20:51,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3262, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3449, PETRI_PLACES=384, PETRI_TRANSITIONS=334} [2024-06-21 16:20:51,838 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 353 predicate places. [2024-06-21 16:20:51,838 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 334 transitions, 3449 flow [2024-06-21 16:20:51,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:51,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:51,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:51,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 16:20:51,839 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:51,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:51,839 INFO L85 PathProgramCache]: Analyzing trace with hash 664543727, now seen corresponding path program 14 times [2024-06-21 16:20:51,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:51,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513111675] [2024-06-21 16:20:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:51,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:52,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:52,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513111675] [2024-06-21 16:20:52,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513111675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:52,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:52,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:52,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566349179] [2024-06-21 16:20:52,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:52,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:52,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:52,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:52,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:52,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:52,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 334 transitions, 3449 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:52,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:52,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:52,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:53,353 INFO L124 PetriNetUnfolderBase]: 889/1594 cut-off events. [2024-06-21 16:20:53,353 INFO L125 PetriNetUnfolderBase]: For 319584/319584 co-relation queries the response was YES. [2024-06-21 16:20:53,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10808 conditions, 1594 events. 889/1594 cut-off events. For 319584/319584 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 9042 event pairs, 79 based on Foata normal form. 14/1607 useless extension candidates. Maximal degree in co-relation 10628. Up to 1047 conditions per place. [2024-06-21 16:20:53,374 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 252 selfloop transitions, 93 changer transitions 16/363 dead transitions. [2024-06-21 16:20:53,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 363 transitions, 4385 flow [2024-06-21 16:20:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:20:53,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:20:53,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 159 transitions. [2024-06-21 16:20:53,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140625 [2024-06-21 16:20:53,375 INFO L175 Difference]: Start difference. First operand has 384 places, 334 transitions, 3449 flow. Second operand 12 states and 159 transitions. [2024-06-21 16:20:53,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 363 transitions, 4385 flow [2024-06-21 16:20:54,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 363 transitions, 4116 flow, removed 37 selfloop flow, removed 12 redundant places. [2024-06-21 16:20:54,275 INFO L231 Difference]: Finished difference. Result has 384 places, 325 transitions, 3296 flow [2024-06-21 16:20:54,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3180, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3296, PETRI_PLACES=384, PETRI_TRANSITIONS=325} [2024-06-21 16:20:54,276 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 353 predicate places. [2024-06-21 16:20:54,276 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 325 transitions, 3296 flow [2024-06-21 16:20:54,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:54,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:54,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:54,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 16:20:54,277 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:54,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:54,277 INFO L85 PathProgramCache]: Analyzing trace with hash -183127337, now seen corresponding path program 15 times [2024-06-21 16:20:54,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:54,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704991337] [2024-06-21 16:20:54,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:54,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:55,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:55,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704991337] [2024-06-21 16:20:55,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704991337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:55,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:55,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:55,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655467351] [2024-06-21 16:20:55,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:55,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:55,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:55,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:55,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:55,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:55,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 325 transitions, 3296 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:55,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:55,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:55,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:55,924 INFO L124 PetriNetUnfolderBase]: 865/1562 cut-off events. [2024-06-21 16:20:55,924 INFO L125 PetriNetUnfolderBase]: For 323570/323570 co-relation queries the response was YES. [2024-06-21 16:20:55,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10590 conditions, 1562 events. 865/1562 cut-off events. For 323570/323570 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 8840 event pairs, 83 based on Foata normal form. 14/1575 useless extension candidates. Maximal degree in co-relation 10411. Up to 1039 conditions per place. [2024-06-21 16:20:55,946 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 256 selfloop transitions, 86 changer transitions 11/355 dead transitions. [2024-06-21 16:20:55,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 355 transitions, 4298 flow [2024-06-21 16:20:55,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:20:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:20:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 161 transitions. [2024-06-21 16:20:55,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4192708333333333 [2024-06-21 16:20:55,948 INFO L175 Difference]: Start difference. First operand has 384 places, 325 transitions, 3296 flow. Second operand 12 states and 161 transitions. [2024-06-21 16:20:55,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 355 transitions, 4298 flow [2024-06-21 16:20:56,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 355 transitions, 4060 flow, removed 2 selfloop flow, removed 15 redundant places. [2024-06-21 16:20:56,840 INFO L231 Difference]: Finished difference. Result has 380 places, 323 transitions, 3260 flow [2024-06-21 16:20:56,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3058, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3260, PETRI_PLACES=380, PETRI_TRANSITIONS=323} [2024-06-21 16:20:56,841 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 349 predicate places. [2024-06-21 16:20:56,841 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 323 transitions, 3260 flow [2024-06-21 16:20:56,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:56,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:56,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:56,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 16:20:56,842 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:56,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:56,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1958935850, now seen corresponding path program 11 times [2024-06-21 16:20:56,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:56,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113346537] [2024-06-21 16:20:56,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:56,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:57,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:57,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113346537] [2024-06-21 16:20:57,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113346537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:57,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:57,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:57,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082576241] [2024-06-21 16:20:57,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:57,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:57,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:57,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:57,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:57,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:20:57,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 323 transitions, 3260 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:57,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:57,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:20:57,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:58,536 INFO L124 PetriNetUnfolderBase]: 839/1516 cut-off events. [2024-06-21 16:20:58,536 INFO L125 PetriNetUnfolderBase]: For 215525/215525 co-relation queries the response was YES. [2024-06-21 16:20:58,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10327 conditions, 1516 events. 839/1516 cut-off events. For 215525/215525 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 8619 event pairs, 75 based on Foata normal form. 2/1517 useless extension candidates. Maximal degree in co-relation 10149. Up to 1049 conditions per place. [2024-06-21 16:20:58,558 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 257 selfloop transitions, 87 changer transitions 4/350 dead transitions. [2024-06-21 16:20:58,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 350 transitions, 4182 flow [2024-06-21 16:20:58,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:20:58,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:20:58,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 162 transitions. [2024-06-21 16:20:58,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894230769230769 [2024-06-21 16:20:58,560 INFO L175 Difference]: Start difference. First operand has 380 places, 323 transitions, 3260 flow. Second operand 13 states and 162 transitions. [2024-06-21 16:20:58,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 350 transitions, 4182 flow [2024-06-21 16:20:59,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 350 transitions, 3960 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-21 16:20:59,548 INFO L231 Difference]: Finished difference. Result has 384 places, 325 transitions, 3349 flow [2024-06-21 16:20:59,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3038, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3349, PETRI_PLACES=384, PETRI_TRANSITIONS=325} [2024-06-21 16:20:59,548 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 353 predicate places. [2024-06-21 16:20:59,548 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 325 transitions, 3349 flow [2024-06-21 16:20:59,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:20:59,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:59,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:59,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 16:20:59,549 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:20:59,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:59,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1076945110, now seen corresponding path program 6 times [2024-06-21 16:20:59,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:59,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815764894] [2024-06-21 16:20:59,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:59,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:00,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:00,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815764894] [2024-06-21 16:21:00,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815764894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:00,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:00,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:00,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174367104] [2024-06-21 16:21:00,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:00,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:00,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:00,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:00,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:00,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:21:00,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 325 transitions, 3349 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:00,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:00,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:21:00,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:01,090 INFO L124 PetriNetUnfolderBase]: 847/1528 cut-off events. [2024-06-21 16:21:01,090 INFO L125 PetriNetUnfolderBase]: For 217480/217480 co-relation queries the response was YES. [2024-06-21 16:21:01,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10351 conditions, 1528 events. 847/1528 cut-off events. For 217480/217480 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 8674 event pairs, 75 based on Foata normal form. 2/1529 useless extension candidates. Maximal degree in co-relation 10171. Up to 1215 conditions per place. [2024-06-21 16:21:01,108 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 274 selfloop transitions, 73 changer transitions 1/350 dead transitions. [2024-06-21 16:21:01,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 350 transitions, 4175 flow [2024-06-21 16:21:01,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:21:01,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:21:01,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 16:21:01,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835227272727273 [2024-06-21 16:21:01,109 INFO L175 Difference]: Start difference. First operand has 384 places, 325 transitions, 3349 flow. Second operand 11 states and 135 transitions. [2024-06-21 16:21:01,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 350 transitions, 4175 flow [2024-06-21 16:21:02,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 350 transitions, 3880 flow, removed 60 selfloop flow, removed 10 redundant places. [2024-06-21 16:21:02,012 INFO L231 Difference]: Finished difference. Result has 385 places, 331 transitions, 3300 flow [2024-06-21 16:21:02,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3058, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3300, PETRI_PLACES=385, PETRI_TRANSITIONS=331} [2024-06-21 16:21:02,019 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 354 predicate places. [2024-06-21 16:21:02,019 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 331 transitions, 3300 flow [2024-06-21 16:21:02,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:02,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:02,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:02,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 16:21:02,020 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:21:02,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:02,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1757371804, now seen corresponding path program 7 times [2024-06-21 16:21:02,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:02,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55857462] [2024-06-21 16:21:02,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:02,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:03,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:03,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55857462] [2024-06-21 16:21:03,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55857462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:03,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:03,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:03,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721404969] [2024-06-21 16:21:03,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:03,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:03,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:03,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:03,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:03,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:21:03,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 331 transitions, 3300 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:03,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:03,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:21:03,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:03,586 INFO L124 PetriNetUnfolderBase]: 853/1538 cut-off events. [2024-06-21 16:21:03,586 INFO L125 PetriNetUnfolderBase]: For 217337/217337 co-relation queries the response was YES. [2024-06-21 16:21:03,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10274 conditions, 1538 events. 853/1538 cut-off events. For 217337/217337 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 8735 event pairs, 77 based on Foata normal form. 2/1539 useless extension candidates. Maximal degree in co-relation 10092. Up to 1221 conditions per place. [2024-06-21 16:21:03,604 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 285 selfloop transitions, 67 changer transitions 0/354 dead transitions. [2024-06-21 16:21:03,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 354 transitions, 4121 flow [2024-06-21 16:21:03,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:21:03,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:21:03,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 16:21:03,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-21 16:21:03,605 INFO L175 Difference]: Start difference. First operand has 385 places, 331 transitions, 3300 flow. Second operand 11 states and 139 transitions. [2024-06-21 16:21:03,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 354 transitions, 4121 flow [2024-06-21 16:21:04,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 354 transitions, 3980 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 16:21:04,507 INFO L231 Difference]: Finished difference. Result has 391 places, 335 transitions, 3370 flow [2024-06-21 16:21:04,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3173, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3370, PETRI_PLACES=391, PETRI_TRANSITIONS=335} [2024-06-21 16:21:04,507 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 360 predicate places. [2024-06-21 16:21:04,507 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 335 transitions, 3370 flow [2024-06-21 16:21:04,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:04,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:04,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:04,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 16:21:04,508 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:21:04,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:04,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1076954410, now seen corresponding path program 8 times [2024-06-21 16:21:04,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:04,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302116206] [2024-06-21 16:21:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:04,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:05,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:05,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302116206] [2024-06-21 16:21:05,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302116206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:05,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:05,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:05,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886982704] [2024-06-21 16:21:05,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:05,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:05,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:05,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:05,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:05,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:21:05,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 335 transitions, 3370 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:05,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:05,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:21:05,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:06,084 INFO L124 PetriNetUnfolderBase]: 857/1546 cut-off events. [2024-06-21 16:21:06,084 INFO L125 PetriNetUnfolderBase]: For 219902/219902 co-relation queries the response was YES. [2024-06-21 16:21:06,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10319 conditions, 1546 events. 857/1546 cut-off events. For 219902/219902 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 8806 event pairs, 77 based on Foata normal form. 2/1547 useless extension candidates. Maximal degree in co-relation 10135. Up to 1215 conditions per place. [2024-06-21 16:21:06,100 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 275 selfloop transitions, 77 changer transitions 0/354 dead transitions. [2024-06-21 16:21:06,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 354 transitions, 4142 flow [2024-06-21 16:21:06,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:21:06,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:21:06,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 16:21:06,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-21 16:21:06,101 INFO L175 Difference]: Start difference. First operand has 391 places, 335 transitions, 3370 flow. Second operand 11 states and 136 transitions. [2024-06-21 16:21:06,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 354 transitions, 4142 flow [2024-06-21 16:21:07,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 354 transitions, 4010 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:21:07,120 INFO L231 Difference]: Finished difference. Result has 396 places, 336 transitions, 3418 flow [2024-06-21 16:21:07,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3238, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3418, PETRI_PLACES=396, PETRI_TRANSITIONS=336} [2024-06-21 16:21:07,121 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 365 predicate places. [2024-06-21 16:21:07,121 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 336 transitions, 3418 flow [2024-06-21 16:21:07,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:07,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:07,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:07,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 16:21:07,122 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:21:07,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:07,122 INFO L85 PathProgramCache]: Analyzing trace with hash -182911856, now seen corresponding path program 9 times [2024-06-21 16:21:07,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:07,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124677303] [2024-06-21 16:21:07,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:07,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:08,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:08,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124677303] [2024-06-21 16:21:08,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124677303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:08,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:08,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:08,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508239312] [2024-06-21 16:21:08,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:08,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:08,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:08,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:08,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:08,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:21:08,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 336 transitions, 3418 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:08,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:08,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:21:08,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:08,919 INFO L124 PetriNetUnfolderBase]: 861/1554 cut-off events. [2024-06-21 16:21:08,919 INFO L125 PetriNetUnfolderBase]: For 223682/223682 co-relation queries the response was YES. [2024-06-21 16:21:08,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10411 conditions, 1554 events. 861/1554 cut-off events. For 223682/223682 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 8879 event pairs, 77 based on Foata normal form. 2/1555 useless extension candidates. Maximal degree in co-relation 10226. Up to 1237 conditions per place. [2024-06-21 16:21:08,936 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 285 selfloop transitions, 70 changer transitions 0/357 dead transitions. [2024-06-21 16:21:08,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 357 transitions, 4219 flow [2024-06-21 16:21:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:21:08,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:21:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 16:21:08,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38920454545454547 [2024-06-21 16:21:08,937 INFO L175 Difference]: Start difference. First operand has 396 places, 336 transitions, 3418 flow. Second operand 11 states and 137 transitions. [2024-06-21 16:21:08,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 357 transitions, 4219 flow [2024-06-21 16:21:09,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 357 transitions, 4047 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 16:21:09,827 INFO L231 Difference]: Finished difference. Result has 399 places, 338 transitions, 3434 flow [2024-06-21 16:21:09,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3248, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3434, PETRI_PLACES=399, PETRI_TRANSITIONS=338} [2024-06-21 16:21:09,828 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 368 predicate places. [2024-06-21 16:21:09,828 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 338 transitions, 3434 flow [2024-06-21 16:21:09,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:09,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:09,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:09,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 16:21:09,828 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:21:09,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:09,829 INFO L85 PathProgramCache]: Analyzing trace with hash 811032504, now seen corresponding path program 12 times [2024-06-21 16:21:09,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:09,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587121720] [2024-06-21 16:21:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:09,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:10,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:10,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587121720] [2024-06-21 16:21:10,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587121720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:10,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:10,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:10,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167136844] [2024-06-21 16:21:10,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:10,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:10,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:10,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:10,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:10,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:21:10,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 338 transitions, 3434 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:10,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:10,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:21:10,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:11,507 INFO L124 PetriNetUnfolderBase]: 873/1574 cut-off events. [2024-06-21 16:21:11,507 INFO L125 PetriNetUnfolderBase]: For 229312/229312 co-relation queries the response was YES. [2024-06-21 16:21:11,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10672 conditions, 1574 events. 873/1574 cut-off events. For 229312/229312 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 8998 event pairs, 83 based on Foata normal form. 2/1575 useless extension candidates. Maximal degree in co-relation 10485. Up to 1089 conditions per place. [2024-06-21 16:21:11,528 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 265 selfloop transitions, 99 changer transitions 0/366 dead transitions. [2024-06-21 16:21:11,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 366 transitions, 4403 flow [2024-06-21 16:21:11,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:21:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:21:11,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 163 transitions. [2024-06-21 16:21:11,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3918269230769231 [2024-06-21 16:21:11,533 INFO L175 Difference]: Start difference. First operand has 399 places, 338 transitions, 3434 flow. Second operand 13 states and 163 transitions. [2024-06-21 16:21:11,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 366 transitions, 4403 flow [2024-06-21 16:21:12,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 366 transitions, 4245 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 16:21:12,591 INFO L231 Difference]: Finished difference. Result has 405 places, 343 transitions, 3665 flow [2024-06-21 16:21:12,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3276, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3665, PETRI_PLACES=405, PETRI_TRANSITIONS=343} [2024-06-21 16:21:12,592 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 374 predicate places. [2024-06-21 16:21:12,592 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 343 transitions, 3665 flow [2024-06-21 16:21:12,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:12,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:12,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:12,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 16:21:12,592 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:21:12,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:12,593 INFO L85 PathProgramCache]: Analyzing trace with hash 670827096, now seen corresponding path program 10 times [2024-06-21 16:21:12,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:12,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805149731] [2024-06-21 16:21:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:12,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:13,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:13,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805149731] [2024-06-21 16:21:13,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805149731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:13,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:13,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:21:13,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772351124] [2024-06-21 16:21:13,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:13,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:21:13,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:13,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:21:13,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:21:13,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:21:13,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 343 transitions, 3665 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:13,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:13,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:21:13,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:13,935 INFO L124 PetriNetUnfolderBase]: 884/1595 cut-off events. [2024-06-21 16:21:13,935 INFO L125 PetriNetUnfolderBase]: For 254325/254325 co-relation queries the response was YES. [2024-06-21 16:21:13,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11206 conditions, 1595 events. 884/1595 cut-off events. For 254325/254325 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 9164 event pairs, 80 based on Foata normal form. 2/1596 useless extension candidates. Maximal degree in co-relation 11017. Up to 1249 conditions per place. [2024-06-21 16:21:13,956 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 292 selfloop transitions, 71 changer transitions 0/365 dead transitions. [2024-06-21 16:21:13,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 365 transitions, 4785 flow [2024-06-21 16:21:13,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:21:13,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:21:13,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-21 16:21:13,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-21 16:21:13,958 INFO L175 Difference]: Start difference. First operand has 405 places, 343 transitions, 3665 flow. Second operand 11 states and 140 transitions. [2024-06-21 16:21:13,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 365 transitions, 4785 flow [2024-06-21 16:21:15,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 365 transitions, 4452 flow, removed 70 selfloop flow, removed 10 redundant places. [2024-06-21 16:21:15,033 INFO L231 Difference]: Finished difference. Result has 406 places, 345 transitions, 3528 flow [2024-06-21 16:21:15,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3332, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3528, PETRI_PLACES=406, PETRI_TRANSITIONS=345} [2024-06-21 16:21:15,033 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 375 predicate places. [2024-06-21 16:21:15,033 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 345 transitions, 3528 flow [2024-06-21 16:21:15,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:15,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:15,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:15,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 16:21:15,034 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:21:15,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:15,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1441887088, now seen corresponding path program 11 times [2024-06-21 16:21:15,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:15,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988194722] [2024-06-21 16:21:15,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:15,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:16,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:16,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988194722] [2024-06-21 16:21:16,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988194722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:16,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:16,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:16,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637412608] [2024-06-21 16:21:16,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:16,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:16,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:16,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:16,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:16,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:21:16,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 345 transitions, 3528 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:16,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:16,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:21:16,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:16,559 INFO L124 PetriNetUnfolderBase]: 895/1616 cut-off events. [2024-06-21 16:21:16,559 INFO L125 PetriNetUnfolderBase]: For 276525/276525 co-relation queries the response was YES. [2024-06-21 16:21:16,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11432 conditions, 1616 events. 895/1616 cut-off events. For 276525/276525 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 9332 event pairs, 83 based on Foata normal form. 2/1617 useless extension candidates. Maximal degree in co-relation 11242. Up to 1171 conditions per place. [2024-06-21 16:21:16,580 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 275 selfloop transitions, 89 changer transitions 0/366 dead transitions. [2024-06-21 16:21:16,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 366 transitions, 4650 flow [2024-06-21 16:21:16,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:21:16,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:21:16,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 16:21:16,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-21 16:21:16,581 INFO L175 Difference]: Start difference. First operand has 406 places, 345 transitions, 3528 flow. Second operand 11 states and 136 transitions. [2024-06-21 16:21:16,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 366 transitions, 4650 flow [2024-06-21 16:21:17,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 366 transitions, 4544 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 16:21:17,682 INFO L231 Difference]: Finished difference. Result has 410 places, 347 transitions, 3658 flow [2024-06-21 16:21:17,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3422, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3658, PETRI_PLACES=410, PETRI_TRANSITIONS=347} [2024-06-21 16:21:17,683 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 379 predicate places. [2024-06-21 16:21:17,683 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 347 transitions, 3658 flow [2024-06-21 16:21:17,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:17,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:17,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:17,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 16:21:17,684 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:21:17,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:17,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1964446255, now seen corresponding path program 16 times [2024-06-21 16:21:17,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:17,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987805551] [2024-06-21 16:21:17,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:17,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:18,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:18,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:18,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987805551] [2024-06-21 16:21:18,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987805551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:18,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:18,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:18,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569048501] [2024-06-21 16:21:18,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:18,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:18,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:18,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:18,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:18,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:21:18,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 347 transitions, 3658 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:18,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:18,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:21:18,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:19,224 INFO L124 PetriNetUnfolderBase]: 942/1709 cut-off events. [2024-06-21 16:21:19,224 INFO L125 PetriNetUnfolderBase]: For 434294/434294 co-relation queries the response was YES. [2024-06-21 16:21:19,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14566 conditions, 1709 events. 942/1709 cut-off events. For 434294/434294 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 9915 event pairs, 98 based on Foata normal form. 2/1710 useless extension candidates. Maximal degree in co-relation 14374. Up to 1066 conditions per place. [2024-06-21 16:21:19,247 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 265 selfloop transitions, 110 changer transitions 0/377 dead transitions. [2024-06-21 16:21:19,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 377 transitions, 5032 flow [2024-06-21 16:21:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:21:19,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:21:19,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 161 transitions. [2024-06-21 16:21:19,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4192708333333333 [2024-06-21 16:21:19,248 INFO L175 Difference]: Start difference. First operand has 410 places, 347 transitions, 3658 flow. Second operand 12 states and 161 transitions. [2024-06-21 16:21:19,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 377 transitions, 5032 flow [2024-06-21 16:21:21,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 377 transitions, 4904 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 16:21:21,162 INFO L231 Difference]: Finished difference. Result has 415 places, 349 transitions, 3868 flow [2024-06-21 16:21:21,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3530, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3868, PETRI_PLACES=415, PETRI_TRANSITIONS=349} [2024-06-21 16:21:21,163 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 384 predicate places. [2024-06-21 16:21:21,163 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 349 transitions, 3868 flow [2024-06-21 16:21:21,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:21,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:21,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:21,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 16:21:21,163 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:21:21,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:21,164 INFO L85 PathProgramCache]: Analyzing trace with hash 818657140, now seen corresponding path program 12 times [2024-06-21 16:21:21,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:21,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532621007] [2024-06-21 16:21:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:21,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:22,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:22,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532621007] [2024-06-21 16:21:22,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532621007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:22,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:22,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:22,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721038864] [2024-06-21 16:21:22,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:22,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:22,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:22,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:22,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:22,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:21:22,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 349 transitions, 3868 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:22,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:22,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:21:22,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:22,799 INFO L124 PetriNetUnfolderBase]: 952/1727 cut-off events. [2024-06-21 16:21:22,799 INFO L125 PetriNetUnfolderBase]: For 440229/440229 co-relation queries the response was YES. [2024-06-21 16:21:22,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14908 conditions, 1727 events. 952/1727 cut-off events. For 440229/440229 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 10026 event pairs, 98 based on Foata normal form. 2/1728 useless extension candidates. Maximal degree in co-relation 14714. Up to 1406 conditions per place. [2024-06-21 16:21:22,823 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 297 selfloop transitions, 72 changer transitions 0/371 dead transitions. [2024-06-21 16:21:22,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 371 transitions, 4716 flow [2024-06-21 16:21:22,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:21:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:21:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 16:21:22,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39204545454545453 [2024-06-21 16:21:22,824 INFO L175 Difference]: Start difference. First operand has 415 places, 349 transitions, 3868 flow. Second operand 11 states and 138 transitions. [2024-06-21 16:21:22,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 371 transitions, 4716 flow [2024-06-21 16:21:24,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 371 transitions, 4506 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-21 16:21:24,812 INFO L231 Difference]: Finished difference. Result has 418 places, 352 transitions, 3864 flow [2024-06-21 16:21:24,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3661, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3864, PETRI_PLACES=418, PETRI_TRANSITIONS=352} [2024-06-21 16:21:24,812 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 387 predicate places. [2024-06-21 16:21:24,813 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 352 transitions, 3864 flow [2024-06-21 16:21:24,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:24,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:24,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:24,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 16:21:24,813 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:21:24,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:24,814 INFO L85 PathProgramCache]: Analyzing trace with hash 11027554, now seen corresponding path program 13 times [2024-06-21 16:21:24,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:24,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029426331] [2024-06-21 16:21:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:24,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:25,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:25,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029426331] [2024-06-21 16:21:25,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029426331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:25,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:25,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:25,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880368425] [2024-06-21 16:21:25,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:25,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:25,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:25,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:25,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:25,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:21:25,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 352 transitions, 3864 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:25,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:25,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:21:25,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:26,576 INFO L124 PetriNetUnfolderBase]: 949/1722 cut-off events. [2024-06-21 16:21:26,576 INFO L125 PetriNetUnfolderBase]: For 420838/420838 co-relation queries the response was YES. [2024-06-21 16:21:26,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14550 conditions, 1722 events. 949/1722 cut-off events. For 420838/420838 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 10029 event pairs, 101 based on Foata normal form. 2/1723 useless extension candidates. Maximal degree in co-relation 14354. Up to 1401 conditions per place. [2024-06-21 16:21:26,600 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 301 selfloop transitions, 69 changer transitions 0/372 dead transitions. [2024-06-21 16:21:26,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 372 transitions, 4662 flow [2024-06-21 16:21:26,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:21:26,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:21:26,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-06-21 16:21:26,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005681818181818 [2024-06-21 16:21:26,601 INFO L175 Difference]: Start difference. First operand has 418 places, 352 transitions, 3864 flow. Second operand 11 states and 141 transitions. [2024-06-21 16:21:26,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 372 transitions, 4662 flow [2024-06-21 16:21:28,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 372 transitions, 4462 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 16:21:28,380 INFO L231 Difference]: Finished difference. Result has 421 places, 352 transitions, 3806 flow [2024-06-21 16:21:28,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3664, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3806, PETRI_PLACES=421, PETRI_TRANSITIONS=352} [2024-06-21 16:21:28,381 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 390 predicate places. [2024-06-21 16:21:28,381 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 352 transitions, 3806 flow [2024-06-21 16:21:28,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:28,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:28,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:28,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 16:21:28,382 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:21:28,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:28,382 INFO L85 PathProgramCache]: Analyzing trace with hash 818666440, now seen corresponding path program 14 times [2024-06-21 16:21:28,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:28,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382713760] [2024-06-21 16:21:28,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:28,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:29,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:29,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382713760] [2024-06-21 16:21:29,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382713760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:29,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:29,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:29,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551231756] [2024-06-21 16:21:29,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:29,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:29,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:29,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:29,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:29,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:21:29,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 352 transitions, 3806 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:29,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:29,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:21:29,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:29,935 INFO L124 PetriNetUnfolderBase]: 953/1730 cut-off events. [2024-06-21 16:21:29,935 INFO L125 PetriNetUnfolderBase]: For 425279/425279 co-relation queries the response was YES. [2024-06-21 16:21:29,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14559 conditions, 1730 events. 953/1730 cut-off events. For 425279/425279 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 10107 event pairs, 105 based on Foata normal form. 2/1731 useless extension candidates. Maximal degree in co-relation 14363. Up to 1386 conditions per place. [2024-06-21 16:21:29,959 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 297 selfloop transitions, 74 changer transitions 0/373 dead transitions. [2024-06-21 16:21:29,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 373 transitions, 4932 flow [2024-06-21 16:21:29,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:21:29,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:21:29,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 16:21:29,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-21 16:21:29,984 INFO L175 Difference]: Start difference. First operand has 421 places, 352 transitions, 3806 flow. Second operand 11 states and 139 transitions. [2024-06-21 16:21:29,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 373 transitions, 4932 flow [2024-06-21 16:21:31,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 373 transitions, 4771 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 16:21:31,831 INFO L231 Difference]: Finished difference. Result has 421 places, 353 transitions, 3825 flow [2024-06-21 16:21:31,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3645, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3825, PETRI_PLACES=421, PETRI_TRANSITIONS=353} [2024-06-21 16:21:31,831 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 390 predicate places. [2024-06-21 16:21:31,832 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 353 transitions, 3825 flow [2024-06-21 16:21:31,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:31,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:31,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:31,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 16:21:31,832 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:21:31,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:31,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1964442535, now seen corresponding path program 17 times [2024-06-21 16:21:31,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:31,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880664124] [2024-06-21 16:21:31,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:31,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:32,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:32,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880664124] [2024-06-21 16:21:32,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880664124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:32,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:32,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:32,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227933755] [2024-06-21 16:21:32,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:32,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:32,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:32,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:32,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:32,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:21:32,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 353 transitions, 3825 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:32,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:32,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:21:32,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:33,480 INFO L124 PetriNetUnfolderBase]: 977/1782 cut-off events. [2024-06-21 16:21:33,481 INFO L125 PetriNetUnfolderBase]: For 567813/567813 co-relation queries the response was YES. [2024-06-21 16:21:33,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15068 conditions, 1782 events. 977/1782 cut-off events. For 567813/567813 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 10482 event pairs, 109 based on Foata normal form. 14/1795 useless extension candidates. Maximal degree in co-relation 14872. Up to 1204 conditions per place. [2024-06-21 16:21:33,510 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 263 selfloop transitions, 108 changer transitions 11/384 dead transitions. [2024-06-21 16:21:33,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 384 transitions, 4880 flow [2024-06-21 16:21:33,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:21:33,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:21:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 172 transitions. [2024-06-21 16:21:33,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41346153846153844 [2024-06-21 16:21:33,511 INFO L175 Difference]: Start difference. First operand has 421 places, 353 transitions, 3825 flow. Second operand 13 states and 172 transitions. [2024-06-21 16:21:33,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 384 transitions, 4880 flow [2024-06-21 16:21:35,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 384 transitions, 4632 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-21 16:21:35,388 INFO L231 Difference]: Finished difference. Result has 424 places, 351 transitions, 3812 flow [2024-06-21 16:21:35,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3577, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3812, PETRI_PLACES=424, PETRI_TRANSITIONS=351} [2024-06-21 16:21:35,389 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 393 predicate places. [2024-06-21 16:21:35,389 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 351 transitions, 3812 flow [2024-06-21 16:21:35,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:35,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:35,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:35,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 16:21:35,389 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:21:35,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:35,393 INFO L85 PathProgramCache]: Analyzing trace with hash -188633712, now seen corresponding path program 13 times [2024-06-21 16:21:35,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:35,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177931618] [2024-06-21 16:21:35,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:35,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:36,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:36,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:36,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177931618] [2024-06-21 16:21:36,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177931618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:36,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:36,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:36,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660398735] [2024-06-21 16:21:36,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:36,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:36,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:36,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:36,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:36,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:21:36,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 351 transitions, 3812 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:36,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:36,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:21:36,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:36,973 INFO L124 PetriNetUnfolderBase]: 961/1748 cut-off events. [2024-06-21 16:21:36,973 INFO L125 PetriNetUnfolderBase]: For 467594/467594 co-relation queries the response was YES. [2024-06-21 16:21:36,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15370 conditions, 1748 events. 961/1748 cut-off events. For 467594/467594 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 10249 event pairs, 106 based on Foata normal form. 2/1749 useless extension candidates. Maximal degree in co-relation 15174. Up to 1209 conditions per place. [2024-06-21 16:21:37,000 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 264 selfloop transitions, 112 changer transitions 3/381 dead transitions. [2024-06-21 16:21:37,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 381 transitions, 5233 flow [2024-06-21 16:21:37,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:21:37,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:21:37,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 173 transitions. [2024-06-21 16:21:37,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861607142857143 [2024-06-21 16:21:37,004 INFO L175 Difference]: Start difference. First operand has 424 places, 351 transitions, 3812 flow. Second operand 14 states and 173 transitions. [2024-06-21 16:21:37,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 381 transitions, 5233 flow [2024-06-21 16:21:39,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 381 transitions, 4976 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-06-21 16:21:39,176 INFO L231 Difference]: Finished difference. Result has 428 places, 355 transitions, 4057 flow [2024-06-21 16:21:39,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3555, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4057, PETRI_PLACES=428, PETRI_TRANSITIONS=355} [2024-06-21 16:21:39,177 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 397 predicate places. [2024-06-21 16:21:39,177 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 355 transitions, 4057 flow [2024-06-21 16:21:39,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:39,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:39,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:39,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 16:21:39,178 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:21:39,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:39,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1764996440, now seen corresponding path program 14 times [2024-06-21 16:21:39,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:39,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365685899] [2024-06-21 16:21:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:39,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:40,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:40,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365685899] [2024-06-21 16:21:40,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365685899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:40,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:40,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:40,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084498660] [2024-06-21 16:21:40,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:40,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:40,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:40,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:40,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:40,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:21:40,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 355 transitions, 4057 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:40,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:40,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:21:40,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:40,941 INFO L124 PetriNetUnfolderBase]: 961/1746 cut-off events. [2024-06-21 16:21:40,941 INFO L125 PetriNetUnfolderBase]: For 449982/449982 co-relation queries the response was YES. [2024-06-21 16:21:40,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14998 conditions, 1746 events. 961/1746 cut-off events. For 449982/449982 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 10230 event pairs, 107 based on Foata normal form. 2/1747 useless extension candidates. Maximal degree in co-relation 14800. Up to 1255 conditions per place. [2024-06-21 16:21:40,967 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 286 selfloop transitions, 93 changer transitions 0/381 dead transitions. [2024-06-21 16:21:40,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 381 transitions, 4918 flow [2024-06-21 16:21:40,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:21:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:21:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 168 transitions. [2024-06-21 16:21:40,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-06-21 16:21:40,969 INFO L175 Difference]: Start difference. First operand has 428 places, 355 transitions, 4057 flow. Second operand 13 states and 168 transitions. [2024-06-21 16:21:40,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 381 transitions, 4918 flow [2024-06-21 16:21:43,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 381 transitions, 4555 flow, removed 117 selfloop flow, removed 9 redundant places. [2024-06-21 16:21:43,079 INFO L231 Difference]: Finished difference. Result has 431 places, 357 transitions, 3916 flow [2024-06-21 16:21:43,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3696, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3916, PETRI_PLACES=431, PETRI_TRANSITIONS=357} [2024-06-21 16:21:43,092 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 400 predicate places. [2024-06-21 16:21:43,092 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 357 transitions, 3916 flow [2024-06-21 16:21:43,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:43,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:43,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:43,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 16:21:43,097 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:21:43,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:43,097 INFO L85 PathProgramCache]: Analyzing trace with hash 10812073, now seen corresponding path program 18 times [2024-06-21 16:21:43,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:43,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454591093] [2024-06-21 16:21:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:43,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:44,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:44,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454591093] [2024-06-21 16:21:44,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454591093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:44,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:44,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:44,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132640472] [2024-06-21 16:21:44,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:44,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:44,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:44,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:44,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:44,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:21:44,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 357 transitions, 3916 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:44,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:44,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:21:44,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:44,929 INFO L124 PetriNetUnfolderBase]: 985/1798 cut-off events. [2024-06-21 16:21:44,929 INFO L125 PetriNetUnfolderBase]: For 591685/591685 co-relation queries the response was YES. [2024-06-21 16:21:44,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15320 conditions, 1798 events. 985/1798 cut-off events. For 591685/591685 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 10574 event pairs, 107 based on Foata normal form. 14/1811 useless extension candidates. Maximal degree in co-relation 15120. Up to 1253 conditions per place. [2024-06-21 16:21:44,954 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 284 selfloop transitions, 84 changer transitions 15/385 dead transitions. [2024-06-21 16:21:44,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 385 transitions, 4952 flow [2024-06-21 16:21:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:21:44,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:21:44,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 162 transitions. [2024-06-21 16:21:44,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 16:21:44,955 INFO L175 Difference]: Start difference. First operand has 431 places, 357 transitions, 3916 flow. Second operand 12 states and 162 transitions. [2024-06-21 16:21:44,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 385 transitions, 4952 flow [2024-06-21 16:21:46,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 385 transitions, 4668 flow, removed 21 selfloop flow, removed 16 redundant places. [2024-06-21 16:21:46,957 INFO L231 Difference]: Finished difference. Result has 427 places, 350 transitions, 3772 flow [2024-06-21 16:21:46,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3632, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3772, PETRI_PLACES=427, PETRI_TRANSITIONS=350} [2024-06-21 16:21:46,958 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 396 predicate places. [2024-06-21 16:21:46,958 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 350 transitions, 3772 flow [2024-06-21 16:21:46,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:46,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:46,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:46,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 16:21:46,959 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:21:46,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:46,959 INFO L85 PathProgramCache]: Analyzing trace with hash 811247830, now seen corresponding path program 15 times [2024-06-21 16:21:46,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:46,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260883198] [2024-06-21 16:21:46,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:46,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:47,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:47,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260883198] [2024-06-21 16:21:47,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260883198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:47,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:47,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:21:47,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191616267] [2024-06-21 16:21:47,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:47,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:21:47,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:47,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:21:47,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:21:47,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:21:47,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 350 transitions, 3772 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:47,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:47,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:21:47,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:48,420 INFO L124 PetriNetUnfolderBase]: 934/1709 cut-off events. [2024-06-21 16:21:48,420 INFO L125 PetriNetUnfolderBase]: For 431215/431215 co-relation queries the response was YES. [2024-06-21 16:21:48,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14251 conditions, 1709 events. 934/1709 cut-off events. For 431215/431215 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 10042 event pairs, 96 based on Foata normal form. 2/1710 useless extension candidates. Maximal degree in co-relation 14055. Up to 1388 conditions per place. [2024-06-21 16:21:48,443 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 296 selfloop transitions, 71 changer transitions 0/369 dead transitions. [2024-06-21 16:21:48,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 369 transitions, 4560 flow [2024-06-21 16:21:48,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:21:48,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:21:48,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 16:21:48,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38920454545454547 [2024-06-21 16:21:48,444 INFO L175 Difference]: Start difference. First operand has 427 places, 350 transitions, 3772 flow. Second operand 11 states and 137 transitions. [2024-06-21 16:21:48,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 369 transitions, 4560 flow [2024-06-21 16:21:50,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 369 transitions, 4328 flow, removed 33 selfloop flow, removed 10 redundant places. [2024-06-21 16:21:50,393 INFO L231 Difference]: Finished difference. Result has 427 places, 350 transitions, 3686 flow [2024-06-21 16:21:50,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3540, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3686, PETRI_PLACES=427, PETRI_TRANSITIONS=350} [2024-06-21 16:21:50,394 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 396 predicate places. [2024-06-21 16:21:50,394 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 350 transitions, 3686 flow [2024-06-21 16:21:50,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:50,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:50,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:50,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 16:21:50,394 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:21:50,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:50,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1708126279, now seen corresponding path program 19 times [2024-06-21 16:21:50,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:50,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187709187] [2024-06-21 16:21:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:50,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:51,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:51,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187709187] [2024-06-21 16:21:51,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187709187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:51,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:51,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:51,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735261361] [2024-06-21 16:21:51,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:51,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:51,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:51,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:51,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:51,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:21:51,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 350 transitions, 3686 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:51,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:51,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:21:51,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:52,077 INFO L124 PetriNetUnfolderBase]: 915/1676 cut-off events. [2024-06-21 16:21:52,077 INFO L125 PetriNetUnfolderBase]: For 410245/410245 co-relation queries the response was YES. [2024-06-21 16:21:52,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11675 conditions, 1676 events. 915/1676 cut-off events. For 410245/410245 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 9856 event pairs, 89 based on Foata normal form. 14/1689 useless extension candidates. Maximal degree in co-relation 11478. Up to 1149 conditions per place. [2024-06-21 16:21:52,101 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 271 selfloop transitions, 87 changer transitions 16/376 dead transitions. [2024-06-21 16:21:52,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 376 transitions, 4650 flow [2024-06-21 16:21:52,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:21:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:21:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 157 transitions. [2024-06-21 16:21:52,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088541666666667 [2024-06-21 16:21:52,103 INFO L175 Difference]: Start difference. First operand has 427 places, 350 transitions, 3686 flow. Second operand 12 states and 157 transitions. [2024-06-21 16:21:52,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 376 transitions, 4650 flow [2024-06-21 16:21:53,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 376 transitions, 4478 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 16:21:53,638 INFO L231 Difference]: Finished difference. Result has 428 places, 341 transitions, 3598 flow [2024-06-21 16:21:53,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3514, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3598, PETRI_PLACES=428, PETRI_TRANSITIONS=341} [2024-06-21 16:21:53,639 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 397 predicate places. [2024-06-21 16:21:53,639 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 341 transitions, 3598 flow [2024-06-21 16:21:53,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:53,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:53,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:53,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 16:21:53,640 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:21:53,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:53,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1794413668, now seen corresponding path program 16 times [2024-06-21 16:21:53,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:53,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271610201] [2024-06-21 16:21:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:53,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:54,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:54,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271610201] [2024-06-21 16:21:54,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271610201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:54,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:54,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:54,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110910171] [2024-06-21 16:21:54,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:54,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:54,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:54,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:54,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:54,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:21:54,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 341 transitions, 3598 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:54,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:54,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:21:54,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:55,327 INFO L124 PetriNetUnfolderBase]: 873/1606 cut-off events. [2024-06-21 16:21:55,327 INFO L125 PetriNetUnfolderBase]: For 268330/268330 co-relation queries the response was YES. [2024-06-21 16:21:55,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11184 conditions, 1606 events. 873/1606 cut-off events. For 268330/268330 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 9470 event pairs, 97 based on Foata normal form. 2/1607 useless extension candidates. Maximal degree in co-relation 10987. Up to 1539 conditions per place. [2024-06-21 16:21:55,353 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 334 selfloop transitions, 24 changer transitions 0/360 dead transitions. [2024-06-21 16:21:55,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 360 transitions, 4415 flow [2024-06-21 16:21:55,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:21:55,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:21:55,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 16:21:55,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3465909090909091 [2024-06-21 16:21:55,355 INFO L175 Difference]: Start difference. First operand has 428 places, 341 transitions, 3598 flow. Second operand 11 states and 122 transitions. [2024-06-21 16:21:55,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 360 transitions, 4415 flow [2024-06-21 16:21:56,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 360 transitions, 4158 flow, removed 20 selfloop flow, removed 12 redundant places. [2024-06-21 16:21:56,734 INFO L231 Difference]: Finished difference. Result has 427 places, 345 transitions, 3465 flow [2024-06-21 16:21:56,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3344, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3465, PETRI_PLACES=427, PETRI_TRANSITIONS=345} [2024-06-21 16:21:56,735 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 396 predicate places. [2024-06-21 16:21:56,735 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 345 transitions, 3465 flow [2024-06-21 16:21:56,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:56,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:56,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:56,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 16:21:56,736 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:21:56,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:56,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1633716056, now seen corresponding path program 17 times [2024-06-21 16:21:56,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:56,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713760303] [2024-06-21 16:21:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:56,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:57,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:57,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713760303] [2024-06-21 16:21:57,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713760303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:57,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:57,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:57,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371930886] [2024-06-21 16:21:57,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:57,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:57,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:57,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:57,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:57,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:21:58,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 345 transitions, 3465 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:58,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:58,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:21:58,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:58,524 INFO L124 PetriNetUnfolderBase]: 883/1624 cut-off events. [2024-06-21 16:21:58,524 INFO L125 PetriNetUnfolderBase]: For 270674/270674 co-relation queries the response was YES. [2024-06-21 16:21:58,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11064 conditions, 1624 events. 883/1624 cut-off events. For 270674/270674 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 9635 event pairs, 87 based on Foata normal form. 2/1625 useless extension candidates. Maximal degree in co-relation 10866. Up to 1470 conditions per place. [2024-06-21 16:21:58,546 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 319 selfloop transitions, 43 changer transitions 0/364 dead transitions. [2024-06-21 16:21:58,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 364 transitions, 4291 flow [2024-06-21 16:21:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:21:58,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:21:58,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 16:21:58,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36079545454545453 [2024-06-21 16:21:58,547 INFO L175 Difference]: Start difference. First operand has 427 places, 345 transitions, 3465 flow. Second operand 11 states and 127 transitions. [2024-06-21 16:21:58,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 364 transitions, 4291 flow [2024-06-21 16:21:59,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 364 transitions, 4221 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 16:21:59,729 INFO L231 Difference]: Finished difference. Result has 431 places, 349 transitions, 3557 flow [2024-06-21 16:21:59,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3557, PETRI_PLACES=431, PETRI_TRANSITIONS=349} [2024-06-21 16:21:59,729 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 400 predicate places. [2024-06-21 16:21:59,729 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 349 transitions, 3557 flow [2024-06-21 16:21:59,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:21:59,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:59,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:59,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 16:21:59,730 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:21:59,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:59,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1633725356, now seen corresponding path program 18 times [2024-06-21 16:21:59,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:59,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380238439] [2024-06-21 16:21:59,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:59,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:00,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:00,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380238439] [2024-06-21 16:22:00,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380238439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:00,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:00,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:22:00,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055643203] [2024-06-21 16:22:00,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:00,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:22:00,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:00,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:22:00,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:22:00,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:22:00,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 349 transitions, 3557 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:00,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:00,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:22:00,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:01,380 INFO L124 PetriNetUnfolderBase]: 894/1645 cut-off events. [2024-06-21 16:22:01,380 INFO L125 PetriNetUnfolderBase]: For 300259/300259 co-relation queries the response was YES. [2024-06-21 16:22:01,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11609 conditions, 1645 events. 894/1645 cut-off events. For 300259/300259 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 9784 event pairs, 88 based on Foata normal form. 2/1646 useless extension candidates. Maximal degree in co-relation 11409. Up to 1466 conditions per place. [2024-06-21 16:22:01,403 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 320 selfloop transitions, 45 changer transitions 0/367 dead transitions. [2024-06-21 16:22:01,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 367 transitions, 4707 flow [2024-06-21 16:22:01,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:22:01,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:22:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 16:22:01,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 16:22:01,405 INFO L175 Difference]: Start difference. First operand has 431 places, 349 transitions, 3557 flow. Second operand 11 states and 128 transitions. [2024-06-21 16:22:01,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 367 transitions, 4707 flow [2024-06-21 16:22:02,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 367 transitions, 4606 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:02,842 INFO L231 Difference]: Finished difference. Result has 436 places, 351 transitions, 3612 flow [2024-06-21 16:22:02,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3456, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3612, PETRI_PLACES=436, PETRI_TRANSITIONS=351} [2024-06-21 16:22:02,842 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 405 predicate places. [2024-06-21 16:22:02,843 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 351 transitions, 3612 flow [2024-06-21 16:22:02,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:02,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:02,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:02,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 16:22:02,843 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:22:02,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:02,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1626306746, now seen corresponding path program 19 times [2024-06-21 16:22:02,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:02,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577516622] [2024-06-21 16:22:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:02,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:03,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:03,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577516622] [2024-06-21 16:22:03,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577516622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:03,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:03,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:22:03,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541378583] [2024-06-21 16:22:03,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:03,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:22:03,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:03,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:22:03,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:22:04,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:22:04,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 351 transitions, 3612 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:04,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:04,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:22:04,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:04,643 INFO L124 PetriNetUnfolderBase]: 898/1653 cut-off events. [2024-06-21 16:22:04,644 INFO L125 PetriNetUnfolderBase]: For 304189/304189 co-relation queries the response was YES. [2024-06-21 16:22:04,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11675 conditions, 1653 events. 898/1653 cut-off events. For 304189/304189 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 9862 event pairs, 84 based on Foata normal form. 2/1654 useless extension candidates. Maximal degree in co-relation 11474. Up to 1474 conditions per place. [2024-06-21 16:22:04,667 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 318 selfloop transitions, 49 changer transitions 0/369 dead transitions. [2024-06-21 16:22:04,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 369 transitions, 4434 flow [2024-06-21 16:22:04,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:22:04,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:22:04,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 16:22:04,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693181818181818 [2024-06-21 16:22:04,668 INFO L175 Difference]: Start difference. First operand has 436 places, 351 transitions, 3612 flow. Second operand 11 states and 130 transitions. [2024-06-21 16:22:04,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 369 transitions, 4434 flow [2024-06-21 16:22:06,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 369 transitions, 4342 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 16:22:06,208 INFO L231 Difference]: Finished difference. Result has 441 places, 353 transitions, 3676 flow [2024-06-21 16:22:06,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3526, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3676, PETRI_PLACES=441, PETRI_TRANSITIONS=353} [2024-06-21 16:22:06,209 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 410 predicate places. [2024-06-21 16:22:06,209 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 353 transitions, 3676 flow [2024-06-21 16:22:06,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:06,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:06,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:06,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 16:22:06,209 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:22:06,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:06,210 INFO L85 PathProgramCache]: Analyzing trace with hash 173065674, now seen corresponding path program 20 times [2024-06-21 16:22:06,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:06,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919473713] [2024-06-21 16:22:06,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:06,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:07,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:07,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919473713] [2024-06-21 16:22:07,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919473713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:07,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:07,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:22:07,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792097472] [2024-06-21 16:22:07,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:07,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:22:07,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:07,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:22:07,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:22:07,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:22:07,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 353 transitions, 3676 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:07,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:07,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:22:07,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:08,353 INFO L124 PetriNetUnfolderBase]: 908/1671 cut-off events. [2024-06-21 16:22:08,353 INFO L125 PetriNetUnfolderBase]: For 308020/308020 co-relation queries the response was YES. [2024-06-21 16:22:08,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11882 conditions, 1671 events. 908/1671 cut-off events. For 308020/308020 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 9977 event pairs, 92 based on Foata normal form. 2/1672 useless extension candidates. Maximal degree in co-relation 11678. Up to 1488 conditions per place. [2024-06-21 16:22:08,376 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 318 selfloop transitions, 51 changer transitions 0/371 dead transitions. [2024-06-21 16:22:08,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 371 transitions, 4517 flow [2024-06-21 16:22:08,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:22:08,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:22:08,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 16:22:08,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3664772727272727 [2024-06-21 16:22:08,377 INFO L175 Difference]: Start difference. First operand has 441 places, 353 transitions, 3676 flow. Second operand 11 states and 129 transitions. [2024-06-21 16:22:08,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 371 transitions, 4517 flow [2024-06-21 16:22:09,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 371 transitions, 4395 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 16:22:09,744 INFO L231 Difference]: Finished difference. Result has 444 places, 356 transitions, 3725 flow [2024-06-21 16:22:09,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3558, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3725, PETRI_PLACES=444, PETRI_TRANSITIONS=356} [2024-06-21 16:22:09,744 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 413 predicate places. [2024-06-21 16:22:09,744 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 356 transitions, 3725 flow [2024-06-21 16:22:09,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:09,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:09,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:09,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 16:22:09,745 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:22:09,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:09,745 INFO L85 PathProgramCache]: Analyzing trace with hash 41392498, now seen corresponding path program 21 times [2024-06-21 16:22:09,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:09,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841055107] [2024-06-21 16:22:09,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:09,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:10,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:10,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841055107] [2024-06-21 16:22:10,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841055107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:10,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:10,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:22:10,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206807374] [2024-06-21 16:22:10,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:10,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:22:10,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:10,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:22:10,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:22:10,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:22:10,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 356 transitions, 3725 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:10,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:10,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:22:10,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:11,516 INFO L124 PetriNetUnfolderBase]: 918/1689 cut-off events. [2024-06-21 16:22:11,516 INFO L125 PetriNetUnfolderBase]: For 311896/311896 co-relation queries the response was YES. [2024-06-21 16:22:11,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12018 conditions, 1689 events. 918/1689 cut-off events. For 311896/311896 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 10117 event pairs, 92 based on Foata normal form. 2/1690 useless extension candidates. Maximal degree in co-relation 11813. Up to 1502 conditions per place. [2024-06-21 16:22:11,542 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 322 selfloop transitions, 51 changer transitions 0/375 dead transitions. [2024-06-21 16:22:11,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 375 transitions, 4580 flow [2024-06-21 16:22:11,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:22:11,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:22:11,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-21 16:22:11,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3721590909090909 [2024-06-21 16:22:11,543 INFO L175 Difference]: Start difference. First operand has 444 places, 356 transitions, 3725 flow. Second operand 11 states and 131 transitions. [2024-06-21 16:22:11,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 375 transitions, 4580 flow [2024-06-21 16:22:13,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 375 transitions, 4466 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 16:22:13,025 INFO L231 Difference]: Finished difference. Result has 448 places, 359 transitions, 3784 flow [2024-06-21 16:22:13,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3615, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3784, PETRI_PLACES=448, PETRI_TRANSITIONS=359} [2024-06-21 16:22:13,026 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 417 predicate places. [2024-06-21 16:22:13,026 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 359 transitions, 3784 flow [2024-06-21 16:22:13,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:13,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:13,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:13,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 16:22:13,027 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:22:13,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:13,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1760115524, now seen corresponding path program 15 times [2024-06-21 16:22:13,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:13,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693344462] [2024-06-21 16:22:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:13,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:13,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:13,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:13,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693344462] [2024-06-21 16:22:13,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693344462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:13,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:13,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:22:13,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79311902] [2024-06-21 16:22:13,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:13,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:22:13,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:13,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:22:13,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:22:14,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:22:14,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 359 transitions, 3784 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:14,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:14,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:22:14,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:14,785 INFO L124 PetriNetUnfolderBase]: 924/1699 cut-off events. [2024-06-21 16:22:14,785 INFO L125 PetriNetUnfolderBase]: For 318549/318549 co-relation queries the response was YES. [2024-06-21 16:22:14,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12209 conditions, 1699 events. 924/1699 cut-off events. For 318549/318549 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 10159 event pairs, 78 based on Foata normal form. 2/1700 useless extension candidates. Maximal degree in co-relation 12004. Up to 1397 conditions per place. [2024-06-21 16:22:14,810 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 308 selfloop transitions, 73 changer transitions 0/383 dead transitions. [2024-06-21 16:22:14,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 383 transitions, 5080 flow [2024-06-21 16:22:14,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:22:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:22:14,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 155 transitions. [2024-06-21 16:22:14,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37259615384615385 [2024-06-21 16:22:14,812 INFO L175 Difference]: Start difference. First operand has 448 places, 359 transitions, 3784 flow. Second operand 13 states and 155 transitions. [2024-06-21 16:22:14,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 383 transitions, 5080 flow [2024-06-21 16:22:16,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 383 transitions, 4941 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 16:22:16,595 INFO L231 Difference]: Finished difference. Result has 452 places, 361 transitions, 3936 flow [2024-06-21 16:22:16,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3645, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3936, PETRI_PLACES=452, PETRI_TRANSITIONS=361} [2024-06-21 16:22:16,596 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 421 predicate places. [2024-06-21 16:22:16,596 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 361 transitions, 3936 flow [2024-06-21 16:22:16,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:16,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:16,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:16,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 16:22:16,597 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:22:16,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:16,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1727994540, now seen corresponding path program 22 times [2024-06-21 16:22:16,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:16,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725716643] [2024-06-21 16:22:16,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:16,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:17,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:17,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725716643] [2024-06-21 16:22:17,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725716643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:17,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:17,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:22:17,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645177848] [2024-06-21 16:22:17,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:17,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:22:17,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:17,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:22:17,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:22:17,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:22:17,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 361 transitions, 3936 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:17,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:17,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:22:17,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:18,661 INFO L124 PetriNetUnfolderBase]: 934/1717 cut-off events. [2024-06-21 16:22:18,661 INFO L125 PetriNetUnfolderBase]: For 322854/322854 co-relation queries the response was YES. [2024-06-21 16:22:18,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12385 conditions, 1717 events. 934/1717 cut-off events. For 322854/322854 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 10300 event pairs, 102 based on Foata normal form. 2/1718 useless extension candidates. Maximal degree in co-relation 12180. Up to 1621 conditions per place. [2024-06-21 16:22:18,686 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 347 selfloop transitions, 30 changer transitions 0/379 dead transitions. [2024-06-21 16:22:18,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 379 transitions, 4795 flow [2024-06-21 16:22:18,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:22:18,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:22:18,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-21 16:22:18,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35511363636363635 [2024-06-21 16:22:18,687 INFO L175 Difference]: Start difference. First operand has 452 places, 361 transitions, 3936 flow. Second operand 11 states and 125 transitions. [2024-06-21 16:22:18,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 379 transitions, 4795 flow [2024-06-21 16:22:20,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 379 transitions, 4417 flow, removed 67 selfloop flow, removed 12 redundant places. [2024-06-21 16:22:20,362 INFO L231 Difference]: Finished difference. Result has 451 places, 364 transitions, 3689 flow [2024-06-21 16:22:20,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3561, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3689, PETRI_PLACES=451, PETRI_TRANSITIONS=364} [2024-06-21 16:22:20,362 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 420 predicate places. [2024-06-21 16:22:20,362 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 364 transitions, 3689 flow [2024-06-21 16:22:20,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:20,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:20,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:20,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 16:22:20,363 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:22:20,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:20,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1862009344, now seen corresponding path program 23 times [2024-06-21 16:22:20,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:20,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473430399] [2024-06-21 16:22:20,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:20,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:21,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:21,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473430399] [2024-06-21 16:22:21,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473430399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:21,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:21,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:22:21,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364303220] [2024-06-21 16:22:21,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:21,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:22:21,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:21,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:22:21,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:22:21,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:22:21,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 364 transitions, 3689 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:21,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:21,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:22:21,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:22,323 INFO L124 PetriNetUnfolderBase]: 938/1725 cut-off events. [2024-06-21 16:22:22,323 INFO L125 PetriNetUnfolderBase]: For 322534/322534 co-relation queries the response was YES. [2024-06-21 16:22:22,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12154 conditions, 1725 events. 938/1725 cut-off events. For 322534/322534 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 10376 event pairs, 102 based on Foata normal form. 2/1726 useless extension candidates. Maximal degree in co-relation 11948. Up to 1640 conditions per place. [2024-06-21 16:22:22,350 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 351 selfloop transitions, 26 changer transitions 0/379 dead transitions. [2024-06-21 16:22:22,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 379 transitions, 4515 flow [2024-06-21 16:22:22,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:22:22,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:22:22,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 16:22:22,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3494318181818182 [2024-06-21 16:22:22,351 INFO L175 Difference]: Start difference. First operand has 451 places, 364 transitions, 3689 flow. Second operand 11 states and 123 transitions. [2024-06-21 16:22:22,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 379 transitions, 4515 flow [2024-06-21 16:22:23,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 379 transitions, 4429 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 16:22:23,720 INFO L231 Difference]: Finished difference. Result has 455 places, 365 transitions, 3699 flow [2024-06-21 16:22:23,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3603, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3699, PETRI_PLACES=455, PETRI_TRANSITIONS=365} [2024-06-21 16:22:23,721 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 424 predicate places. [2024-06-21 16:22:23,721 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 365 transitions, 3699 flow [2024-06-21 16:22:23,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:23,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:23,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:23,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 16:22:23,722 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:22:23,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:23,722 INFO L85 PathProgramCache]: Analyzing trace with hash 65149579, now seen corresponding path program 20 times [2024-06-21 16:22:23,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:23,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463006992] [2024-06-21 16:22:23,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:23,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:24,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:24,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463006992] [2024-06-21 16:22:24,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463006992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:24,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:24,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:22:24,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131684627] [2024-06-21 16:22:24,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:24,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:22:24,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:24,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:22:24,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:22:24,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:22:24,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 365 transitions, 3699 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:24,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:24,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:22:24,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:25,450 INFO L124 PetriNetUnfolderBase]: 962/1777 cut-off events. [2024-06-21 16:22:25,451 INFO L125 PetriNetUnfolderBase]: For 491522/491522 co-relation queries the response was YES. [2024-06-21 16:22:25,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12611 conditions, 1777 events. 962/1777 cut-off events. For 491522/491522 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 10773 event pairs, 92 based on Foata normal form. 14/1790 useless extension candidates. Maximal degree in co-relation 12405. Up to 1464 conditions per place. [2024-06-21 16:22:25,475 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 323 selfloop transitions, 52 changer transitions 14/391 dead transitions. [2024-06-21 16:22:25,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 391 transitions, 4757 flow [2024-06-21 16:22:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:22:25,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:22:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-21 16:22:25,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854166666666667 [2024-06-21 16:22:25,477 INFO L175 Difference]: Start difference. First operand has 455 places, 365 transitions, 3699 flow. Second operand 12 states and 148 transitions. [2024-06-21 16:22:25,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 391 transitions, 4757 flow [2024-06-21 16:22:27,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 391 transitions, 4666 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-21 16:22:27,101 INFO L231 Difference]: Finished difference. Result has 458 places, 360 transitions, 3715 flow [2024-06-21 16:22:27,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3608, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3715, PETRI_PLACES=458, PETRI_TRANSITIONS=360} [2024-06-21 16:22:27,101 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 427 predicate places. [2024-06-21 16:22:27,102 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 360 transitions, 3715 flow [2024-06-21 16:22:27,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:27,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:27,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:27,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 16:22:27,102 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:22:27,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:27,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1432367336, now seen corresponding path program 24 times [2024-06-21 16:22:27,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:27,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841861038] [2024-06-21 16:22:27,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:27,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:28,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:28,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841861038] [2024-06-21 16:22:28,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841861038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:28,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:28,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:22:28,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291781916] [2024-06-21 16:22:28,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:28,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:22:28,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:28,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:22:28,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:22:28,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:22:28,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 360 transitions, 3715 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:28,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:28,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:22:28,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:28,816 INFO L124 PetriNetUnfolderBase]: 919/1704 cut-off events. [2024-06-21 16:22:28,816 INFO L125 PetriNetUnfolderBase]: For 302733/302733 co-relation queries the response was YES. [2024-06-21 16:22:28,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11711 conditions, 1704 events. 919/1704 cut-off events. For 302733/302733 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 10347 event pairs, 81 based on Foata normal form. 2/1705 useless extension candidates. Maximal degree in co-relation 11504. Up to 1513 conditions per place. [2024-06-21 16:22:28,839 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 313 selfloop transitions, 60 changer transitions 0/375 dead transitions. [2024-06-21 16:22:28,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 375 transitions, 4501 flow [2024-06-21 16:22:28,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:22:28,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:22:28,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 16:22:28,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36079545454545453 [2024-06-21 16:22:28,840 INFO L175 Difference]: Start difference. First operand has 458 places, 360 transitions, 3715 flow. Second operand 11 states and 127 transitions. [2024-06-21 16:22:28,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 375 transitions, 4501 flow [2024-06-21 16:22:30,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 375 transitions, 4323 flow, removed 38 selfloop flow, removed 10 redundant places. [2024-06-21 16:22:30,220 INFO L231 Difference]: Finished difference. Result has 459 places, 360 transitions, 3661 flow [2024-06-21 16:22:30,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3537, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3661, PETRI_PLACES=459, PETRI_TRANSITIONS=360} [2024-06-21 16:22:30,221 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 428 predicate places. [2024-06-21 16:22:30,221 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 360 transitions, 3661 flow [2024-06-21 16:22:30,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:30,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:30,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:30,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 16:22:30,221 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:22:30,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:30,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1566175959, now seen corresponding path program 21 times [2024-06-21 16:22:30,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:30,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412119210] [2024-06-21 16:22:30,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:30,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:31,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:31,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412119210] [2024-06-21 16:22:31,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412119210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:31,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:31,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:22:31,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715312135] [2024-06-21 16:22:31,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:31,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:22:31,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:31,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:22:31,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:22:31,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:22:31,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 360 transitions, 3661 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:31,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:31,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:22:31,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:31,924 INFO L124 PetriNetUnfolderBase]: 943/1756 cut-off events. [2024-06-21 16:22:31,925 INFO L125 PetriNetUnfolderBase]: For 473691/473691 co-relation queries the response was YES. [2024-06-21 16:22:31,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12137 conditions, 1756 events. 943/1756 cut-off events. For 473691/473691 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 10695 event pairs, 85 based on Foata normal form. 14/1769 useless extension candidates. Maximal degree in co-relation 11929. Up to 1451 conditions per place. [2024-06-21 16:22:31,947 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 315 selfloop transitions, 56 changer transitions 13/386 dead transitions. [2024-06-21 16:22:31,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 386 transitions, 4711 flow [2024-06-21 16:22:31,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:22:31,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:22:31,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-06-21 16:22:31,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3828125 [2024-06-21 16:22:31,948 INFO L175 Difference]: Start difference. First operand has 459 places, 360 transitions, 3661 flow. Second operand 12 states and 147 transitions. [2024-06-21 16:22:31,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 386 transitions, 4711 flow [2024-06-21 16:22:33,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 386 transitions, 4568 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 16:22:33,357 INFO L231 Difference]: Finished difference. Result has 460 places, 356 transitions, 3648 flow [2024-06-21 16:22:33,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3518, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3648, PETRI_PLACES=460, PETRI_TRANSITIONS=356} [2024-06-21 16:22:33,358 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 429 predicate places. [2024-06-21 16:22:33,358 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 356 transitions, 3648 flow [2024-06-21 16:22:33,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:33,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:33,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:33,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 16:22:33,358 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:22:33,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:33,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1560665709, now seen corresponding path program 22 times [2024-06-21 16:22:33,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:33,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689692842] [2024-06-21 16:22:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:33,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:34,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:34,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689692842] [2024-06-21 16:22:34,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689692842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:34,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:34,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:22:34,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257374635] [2024-06-21 16:22:34,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:34,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:22:34,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:34,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:22:34,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:22:34,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:22:34,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 356 transitions, 3648 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:34,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:34,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:22:34,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:34,998 INFO L124 PetriNetUnfolderBase]: 911/1700 cut-off events. [2024-06-21 16:22:34,999 INFO L125 PetriNetUnfolderBase]: For 310874/310874 co-relation queries the response was YES. [2024-06-21 16:22:35,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11740 conditions, 1700 events. 911/1700 cut-off events. For 310874/310874 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 10389 event pairs, 103 based on Foata normal form. 2/1701 useless extension candidates. Maximal degree in co-relation 11532. Up to 1570 conditions per place. [2024-06-21 16:22:35,023 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 315 selfloop transitions, 54 changer transitions 0/371 dead transitions. [2024-06-21 16:22:35,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 371 transitions, 4816 flow [2024-06-21 16:22:35,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:22:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:22:35,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-21 16:22:35,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2024-06-21 16:22:35,025 INFO L175 Difference]: Start difference. First operand has 460 places, 356 transitions, 3648 flow. Second operand 12 states and 132 transitions. [2024-06-21 16:22:35,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 371 transitions, 4816 flow [2024-06-21 16:22:36,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 371 transitions, 4650 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-21 16:22:36,707 INFO L231 Difference]: Finished difference. Result has 462 places, 357 transitions, 3654 flow [2024-06-21 16:22:36,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3654, PETRI_PLACES=462, PETRI_TRANSITIONS=357} [2024-06-21 16:22:36,708 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 431 predicate places. [2024-06-21 16:22:36,708 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 357 transitions, 3654 flow [2024-06-21 16:22:36,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:36,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:36,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:36,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 16:22:36,708 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:22:36,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:36,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1432152010, now seen corresponding path program 16 times [2024-06-21 16:22:36,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:36,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674394978] [2024-06-21 16:22:36,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:36,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:37,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:37,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674394978] [2024-06-21 16:22:37,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674394978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:37,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:37,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:22:37,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264891005] [2024-06-21 16:22:37,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:37,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:22:37,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:37,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:22:37,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:22:37,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:22:37,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 357 transitions, 3654 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:37,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:37,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:22:37,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:38,446 INFO L124 PetriNetUnfolderBase]: 917/1710 cut-off events. [2024-06-21 16:22:38,446 INFO L125 PetriNetUnfolderBase]: For 316152/316152 co-relation queries the response was YES. [2024-06-21 16:22:38,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11876 conditions, 1710 events. 917/1710 cut-off events. For 316152/316152 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 10450 event pairs, 77 based on Foata normal form. 2/1711 useless extension candidates. Maximal degree in co-relation 11667. Up to 1420 conditions per place. [2024-06-21 16:22:38,481 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 302 selfloop transitions, 74 changer transitions 2/380 dead transitions. [2024-06-21 16:22:38,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 380 transitions, 4962 flow [2024-06-21 16:22:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:22:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:22:38,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 151 transitions. [2024-06-21 16:22:38,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629807692307692 [2024-06-21 16:22:38,482 INFO L175 Difference]: Start difference. First operand has 462 places, 357 transitions, 3654 flow. Second operand 13 states and 151 transitions. [2024-06-21 16:22:38,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 380 transitions, 4962 flow [2024-06-21 16:22:40,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 380 transitions, 4646 flow, removed 36 selfloop flow, removed 14 redundant places. [2024-06-21 16:22:40,274 INFO L231 Difference]: Finished difference. Result has 461 places, 359 transitions, 3641 flow [2024-06-21 16:22:40,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3344, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3641, PETRI_PLACES=461, PETRI_TRANSITIONS=359} [2024-06-21 16:22:40,274 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 430 predicate places. [2024-06-21 16:22:40,275 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 359 transitions, 3641 flow [2024-06-21 16:22:40,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:40,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:40,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:40,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 16:22:40,275 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:22:40,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:40,276 INFO L85 PathProgramCache]: Analyzing trace with hash -812694092, now seen corresponding path program 25 times [2024-06-21 16:22:40,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:40,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714791471] [2024-06-21 16:22:40,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:40,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:41,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:41,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714791471] [2024-06-21 16:22:41,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714791471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:41,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:41,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:22:41,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999477595] [2024-06-21 16:22:41,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:41,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:22:41,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:41,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:22:41,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:22:41,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:22:41,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 359 transitions, 3641 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:41,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:41,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:22:41,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:42,047 INFO L124 PetriNetUnfolderBase]: 921/1718 cut-off events. [2024-06-21 16:22:42,047 INFO L125 PetriNetUnfolderBase]: For 318670/318670 co-relation queries the response was YES. [2024-06-21 16:22:42,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11592 conditions, 1718 events. 921/1718 cut-off events. For 318670/318670 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 10528 event pairs, 97 based on Foata normal form. 2/1719 useless extension candidates. Maximal degree in co-relation 11387. Up to 1538 conditions per place. [2024-06-21 16:22:42,073 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 325 selfloop transitions, 48 changer transitions 0/375 dead transitions. [2024-06-21 16:22:42,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 375 transitions, 4465 flow [2024-06-21 16:22:42,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:22:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:22:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 16:22:42,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3664772727272727 [2024-06-21 16:22:42,074 INFO L175 Difference]: Start difference. First operand has 461 places, 359 transitions, 3641 flow. Second operand 11 states and 129 transitions. [2024-06-21 16:22:42,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 375 transitions, 4465 flow [2024-06-21 16:22:43,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 375 transitions, 4134 flow, removed 69 selfloop flow, removed 12 redundant places. [2024-06-21 16:22:43,360 INFO L231 Difference]: Finished difference. Result has 460 places, 360 transitions, 3452 flow [2024-06-21 16:22:43,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3310, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3452, PETRI_PLACES=460, PETRI_TRANSITIONS=360} [2024-06-21 16:22:43,372 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 429 predicate places. [2024-06-21 16:22:43,372 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 360 transitions, 3452 flow [2024-06-21 16:22:43,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:43,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:43,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:43,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 16:22:43,373 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:22:43,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:43,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1560813579, now seen corresponding path program 23 times [2024-06-21 16:22:43,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:43,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485398589] [2024-06-21 16:22:43,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:43,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:44,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:44,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485398589] [2024-06-21 16:22:44,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485398589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:44,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:44,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:22:44,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059234600] [2024-06-21 16:22:44,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:44,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:22:44,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:44,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:22:44,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:22:44,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:22:44,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 360 transitions, 3452 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:44,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:44,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:22:44,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:45,232 INFO L124 PetriNetUnfolderBase]: 945/1770 cut-off events. [2024-06-21 16:22:45,232 INFO L125 PetriNetUnfolderBase]: For 495152/495152 co-relation queries the response was YES. [2024-06-21 16:22:45,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11779 conditions, 1770 events. 945/1770 cut-off events. For 495152/495152 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 10868 event pairs, 87 based on Foata normal form. 14/1783 useless extension candidates. Maximal degree in co-relation 11574. Up to 1469 conditions per place. [2024-06-21 16:22:45,257 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 308 selfloop transitions, 63 changer transitions 12/385 dead transitions. [2024-06-21 16:22:45,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 385 transitions, 4483 flow [2024-06-21 16:22:45,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:22:45,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:22:45,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 16:22:45,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802083333333333 [2024-06-21 16:22:45,258 INFO L175 Difference]: Start difference. First operand has 460 places, 360 transitions, 3452 flow. Second operand 12 states and 146 transitions. [2024-06-21 16:22:45,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 385 transitions, 4483 flow [2024-06-21 16:22:46,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 385 transitions, 4351 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 16:22:46,777 INFO L231 Difference]: Finished difference. Result has 463 places, 357 transitions, 3467 flow [2024-06-21 16:22:46,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3320, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3467, PETRI_PLACES=463, PETRI_TRANSITIONS=357} [2024-06-21 16:22:46,777 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 432 predicate places. [2024-06-21 16:22:46,777 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 357 transitions, 3467 flow [2024-06-21 16:22:46,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:46,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:46,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:46,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 16:22:46,778 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:22:46,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:46,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1560813734, now seen corresponding path program 17 times [2024-06-21 16:22:46,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:46,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477649241] [2024-06-21 16:22:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:46,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:47,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:47,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477649241] [2024-06-21 16:22:47,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477649241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:47,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:47,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:22:47,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930491618] [2024-06-21 16:22:47,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:47,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:22:47,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:47,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:22:47,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:22:47,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:22:47,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 357 transitions, 3467 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:47,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:47,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:22:47,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:48,273 INFO L124 PetriNetUnfolderBase]: 919/1720 cut-off events. [2024-06-21 16:22:48,274 INFO L125 PetriNetUnfolderBase]: For 325768/325768 co-relation queries the response was YES. [2024-06-21 16:22:48,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11529 conditions, 1720 events. 919/1720 cut-off events. For 325768/325768 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 10554 event pairs, 77 based on Foata normal form. 2/1721 useless extension candidates. Maximal degree in co-relation 11323. Up to 1430 conditions per place. [2024-06-21 16:22:48,298 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 292 selfloop transitions, 82 changer transitions 2/378 dead transitions. [2024-06-21 16:22:48,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 378 transitions, 4765 flow [2024-06-21 16:22:48,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:22:48,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:22:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 16:22:48,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697916666666667 [2024-06-21 16:22:48,299 INFO L175 Difference]: Start difference. First operand has 463 places, 357 transitions, 3467 flow. Second operand 12 states and 142 transitions. [2024-06-21 16:22:48,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 378 transitions, 4765 flow [2024-06-21 16:22:49,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 378 transitions, 4597 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-21 16:22:49,945 INFO L231 Difference]: Finished difference. Result has 465 places, 359 transitions, 3614 flow [2024-06-21 16:22:49,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3299, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3614, PETRI_PLACES=465, PETRI_TRANSITIONS=359} [2024-06-21 16:22:49,946 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 434 predicate places. [2024-06-21 16:22:49,946 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 359 transitions, 3614 flow [2024-06-21 16:22:49,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:49,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:49,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:49,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 16:22:49,946 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:22:49,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:49,947 INFO L85 PathProgramCache]: Analyzing trace with hash 41177017, now seen corresponding path program 24 times [2024-06-21 16:22:49,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:49,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769924972] [2024-06-21 16:22:49,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:49,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:50,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:50,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769924972] [2024-06-21 16:22:50,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769924972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:50,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:50,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:22:50,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762346764] [2024-06-21 16:22:50,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:50,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:22:50,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:50,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:22:50,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:22:50,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:22:50,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 359 transitions, 3614 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:50,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:50,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:22:50,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:51,644 INFO L124 PetriNetUnfolderBase]: 943/1772 cut-off events. [2024-06-21 16:22:51,645 INFO L125 PetriNetUnfolderBase]: For 509778/509778 co-relation queries the response was YES. [2024-06-21 16:22:51,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12046 conditions, 1772 events. 943/1772 cut-off events. For 509778/509778 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 10884 event pairs, 97 based on Foata normal form. 14/1785 useless extension candidates. Maximal degree in co-relation 11839. Up to 1471 conditions per place. [2024-06-21 16:22:51,670 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 322 selfloop transitions, 45 changer transitions 16/385 dead transitions. [2024-06-21 16:22:51,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 385 transitions, 4657 flow [2024-06-21 16:22:51,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:22:51,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:22:51,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-06-21 16:22:51,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880208333333333 [2024-06-21 16:22:51,671 INFO L175 Difference]: Start difference. First operand has 465 places, 359 transitions, 3614 flow. Second operand 12 states and 149 transitions. [2024-06-21 16:22:51,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 385 transitions, 4657 flow [2024-06-21 16:22:53,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 385 transitions, 4383 flow, removed 70 selfloop flow, removed 9 redundant places. [2024-06-21 16:22:53,869 INFO L231 Difference]: Finished difference. Result has 468 places, 353 transitions, 3414 flow [2024-06-21 16:22:53,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3340, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3414, PETRI_PLACES=468, PETRI_TRANSITIONS=353} [2024-06-21 16:22:53,870 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 437 predicate places. [2024-06-21 16:22:53,870 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 353 transitions, 3414 flow [2024-06-21 16:22:53,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:53,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:53,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:53,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 16:22:53,871 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:22:53,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:53,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1426645325, now seen corresponding path program 25 times [2024-06-21 16:22:53,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:53,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895535550] [2024-06-21 16:22:53,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:53,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:54,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:54,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895535550] [2024-06-21 16:22:54,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895535550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:54,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:54,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:22:54,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689264663] [2024-06-21 16:22:54,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:54,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:22:54,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:54,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:22:54,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:22:54,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:22:54,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 353 transitions, 3414 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:54,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:54,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:22:54,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:55,551 INFO L124 PetriNetUnfolderBase]: 903/1708 cut-off events. [2024-06-21 16:22:55,551 INFO L125 PetriNetUnfolderBase]: For 331171/331171 co-relation queries the response was YES. [2024-06-21 16:22:55,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11329 conditions, 1708 events. 903/1708 cut-off events. For 331171/331171 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 10620 event pairs, 83 based on Foata normal form. 2/1709 useless extension candidates. Maximal degree in co-relation 11121. Up to 1447 conditions per place. [2024-06-21 16:22:55,575 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 297 selfloop transitions, 73 changer transitions 2/374 dead transitions. [2024-06-21 16:22:55,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 374 transitions, 4267 flow [2024-06-21 16:22:55,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:22:55,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:22:55,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 150 transitions. [2024-06-21 16:22:55,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3605769230769231 [2024-06-21 16:22:55,576 INFO L175 Difference]: Start difference. First operand has 468 places, 353 transitions, 3414 flow. Second operand 13 states and 150 transitions. [2024-06-21 16:22:55,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 374 transitions, 4267 flow [2024-06-21 16:22:57,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 374 transitions, 4115 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-21 16:22:57,267 INFO L231 Difference]: Finished difference. Result has 470 places, 354 transitions, 3467 flow [2024-06-21 16:22:57,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3262, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3467, PETRI_PLACES=470, PETRI_TRANSITIONS=354} [2024-06-21 16:22:57,267 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 439 predicate places. [2024-06-21 16:22:57,268 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 354 transitions, 3467 flow [2024-06-21 16:22:57,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:57,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:57,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:57,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 16:22:57,268 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:22:57,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:57,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1426645480, now seen corresponding path program 18 times [2024-06-21 16:22:57,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:57,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572808439] [2024-06-21 16:22:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:57,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:58,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:58,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572808439] [2024-06-21 16:22:58,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572808439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:58,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:58,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:22:58,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675031771] [2024-06-21 16:22:58,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:58,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:22:58,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:58,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:22:58,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:22:58,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:22:58,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 354 transitions, 3467 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:22:58,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:58,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:22:58,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:58,900 INFO L124 PetriNetUnfolderBase]: 919/1734 cut-off events. [2024-06-21 16:22:58,900 INFO L125 PetriNetUnfolderBase]: For 371657/371657 co-relation queries the response was YES. [2024-06-21 16:22:58,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12268 conditions, 1734 events. 919/1734 cut-off events. For 371657/371657 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 10773 event pairs, 84 based on Foata normal form. 2/1735 useless extension candidates. Maximal degree in co-relation 12060. Up to 1450 conditions per place. [2024-06-21 16:22:58,931 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 299 selfloop transitions, 75 changer transitions 0/376 dead transitions. [2024-06-21 16:22:58,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 376 transitions, 4911 flow [2024-06-21 16:22:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:22:58,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:22:58,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 16:22:58,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697916666666667 [2024-06-21 16:22:58,933 INFO L175 Difference]: Start difference. First operand has 470 places, 354 transitions, 3467 flow. Second operand 12 states and 142 transitions. [2024-06-21 16:22:58,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 376 transitions, 4911 flow [2024-06-21 16:23:00,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 376 transitions, 4717 flow, removed 26 selfloop flow, removed 11 redundant places. [2024-06-21 16:23:00,900 INFO L231 Difference]: Finished difference. Result has 471 places, 358 transitions, 3726 flow [2024-06-21 16:23:00,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3275, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3726, PETRI_PLACES=471, PETRI_TRANSITIONS=358} [2024-06-21 16:23:00,901 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 440 predicate places. [2024-06-21 16:23:00,901 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 358 transitions, 3726 flow [2024-06-21 16:23:00,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:00,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:00,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:00,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 16:23:00,901 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:00,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:00,902 INFO L85 PathProgramCache]: Analyzing trace with hash -92846932, now seen corresponding path program 19 times [2024-06-21 16:23:00,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:00,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192339121] [2024-06-21 16:23:00,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:00,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:01,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:01,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192339121] [2024-06-21 16:23:01,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192339121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:01,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:01,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:23:01,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002395748] [2024-06-21 16:23:01,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:01,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:23:01,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:01,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:23:01,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:23:01,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:23:01,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 358 transitions, 3726 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:01,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:01,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:23:01,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:02,403 INFO L124 PetriNetUnfolderBase]: 925/1744 cut-off events. [2024-06-21 16:23:02,404 INFO L125 PetriNetUnfolderBase]: For 375062/375062 co-relation queries the response was YES. [2024-06-21 16:23:02,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12457 conditions, 1744 events. 925/1744 cut-off events. For 375062/375062 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 10842 event pairs, 95 based on Foata normal form. 2/1745 useless extension candidates. Maximal degree in co-relation 12248. Up to 1466 conditions per place. [2024-06-21 16:23:02,429 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 317 selfloop transitions, 59 changer transitions 3/381 dead transitions. [2024-06-21 16:23:02,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 381 transitions, 5052 flow [2024-06-21 16:23:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:23:02,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:23:02,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 153 transitions. [2024-06-21 16:23:02,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36778846153846156 [2024-06-21 16:23:02,431 INFO L175 Difference]: Start difference. First operand has 471 places, 358 transitions, 3726 flow. Second operand 13 states and 153 transitions. [2024-06-21 16:23:02,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 381 transitions, 5052 flow [2024-06-21 16:23:03,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 381 transitions, 4789 flow, removed 90 selfloop flow, removed 8 redundant places. [2024-06-21 16:23:03,808 INFO L231 Difference]: Finished difference. Result has 476 places, 360 transitions, 3740 flow [2024-06-21 16:23:03,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3481, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3740, PETRI_PLACES=476, PETRI_TRANSITIONS=360} [2024-06-21 16:23:03,809 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 445 predicate places. [2024-06-21 16:23:03,809 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 360 transitions, 3740 flow [2024-06-21 16:23:03,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:03,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:03,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:03,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 16:23:03,810 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:03,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:03,810 INFO L85 PathProgramCache]: Analyzing trace with hash 307416208, now seen corresponding path program 26 times [2024-06-21 16:23:03,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:03,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585381369] [2024-06-21 16:23:03,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:03,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:04,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:04,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585381369] [2024-06-21 16:23:04,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585381369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:04,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:04,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:23:04,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749750554] [2024-06-21 16:23:04,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:04,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:23:04,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:04,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:23:04,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:23:04,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:23:04,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 360 transitions, 3740 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:04,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:04,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:23:04,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:05,497 INFO L124 PetriNetUnfolderBase]: 936/1765 cut-off events. [2024-06-21 16:23:05,497 INFO L125 PetriNetUnfolderBase]: For 407391/407391 co-relation queries the response was YES. [2024-06-21 16:23:05,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12864 conditions, 1765 events. 936/1765 cut-off events. For 407391/407391 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 10983 event pairs, 101 based on Foata normal form. 2/1766 useless extension candidates. Maximal degree in co-relation 12653. Up to 1481 conditions per place. [2024-06-21 16:23:05,524 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 319 selfloop transitions, 57 changer transitions 0/378 dead transitions. [2024-06-21 16:23:05,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 378 transitions, 4970 flow [2024-06-21 16:23:05,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:05,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:05,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 16:23:05,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3664772727272727 [2024-06-21 16:23:05,526 INFO L175 Difference]: Start difference. First operand has 476 places, 360 transitions, 3740 flow. Second operand 11 states and 129 transitions. [2024-06-21 16:23:05,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 378 transitions, 4970 flow [2024-06-21 16:23:07,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 378 transitions, 4759 flow, removed 62 selfloop flow, removed 10 redundant places. [2024-06-21 16:23:07,454 INFO L231 Difference]: Finished difference. Result has 477 places, 362 transitions, 3733 flow [2024-06-21 16:23:07,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3529, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3733, PETRI_PLACES=477, PETRI_TRANSITIONS=362} [2024-06-21 16:23:07,454 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 446 predicate places. [2024-06-21 16:23:07,454 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 362 transitions, 3733 flow [2024-06-21 16:23:07,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:07,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:07,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:07,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-21 16:23:07,455 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:07,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:07,455 INFO L85 PathProgramCache]: Analyzing trace with hash 48801808, now seen corresponding path program 27 times [2024-06-21 16:23:07,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:07,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812892438] [2024-06-21 16:23:07,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:07,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:08,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:08,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812892438] [2024-06-21 16:23:08,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812892438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:08,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:08,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:23:08,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206180127] [2024-06-21 16:23:08,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:08,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:23:08,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:08,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:23:08,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:23:08,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:23:08,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 362 transitions, 3733 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:08,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:08,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:23:08,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:09,204 INFO L124 PetriNetUnfolderBase]: 940/1773 cut-off events. [2024-06-21 16:23:09,204 INFO L125 PetriNetUnfolderBase]: For 408970/408970 co-relation queries the response was YES. [2024-06-21 16:23:09,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12832 conditions, 1773 events. 940/1773 cut-off events. For 408970/408970 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 11049 event pairs, 101 based on Foata normal form. 2/1774 useless extension candidates. Maximal degree in co-relation 12620. Up to 1607 conditions per place. [2024-06-21 16:23:09,231 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 336 selfloop transitions, 41 changer transitions 0/379 dead transitions. [2024-06-21 16:23:09,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 379 transitions, 4575 flow [2024-06-21 16:23:09,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:09,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:09,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 16:23:09,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3664772727272727 [2024-06-21 16:23:09,232 INFO L175 Difference]: Start difference. First operand has 477 places, 362 transitions, 3733 flow. Second operand 11 states and 129 transitions. [2024-06-21 16:23:09,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 379 transitions, 4575 flow [2024-06-21 16:23:11,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 379 transitions, 4463 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 16:23:11,076 INFO L231 Difference]: Finished difference. Result has 481 places, 363 transitions, 3753 flow [2024-06-21 16:23:11,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3625, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3753, PETRI_PLACES=481, PETRI_TRANSITIONS=363} [2024-06-21 16:23:11,076 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 450 predicate places. [2024-06-21 16:23:11,077 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 363 transitions, 3753 flow [2024-06-21 16:23:11,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:11,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:11,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:11,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-21 16:23:11,077 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:11,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:11,078 INFO L85 PathProgramCache]: Analyzing trace with hash 48811108, now seen corresponding path program 28 times [2024-06-21 16:23:11,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:11,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926413993] [2024-06-21 16:23:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:11,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:12,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:12,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926413993] [2024-06-21 16:23:12,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926413993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:12,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:12,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:23:12,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795664085] [2024-06-21 16:23:12,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:12,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:23:12,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:12,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:23:12,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:23:12,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:23:12,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 363 transitions, 3753 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:12,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:12,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:23:12,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:12,771 INFO L124 PetriNetUnfolderBase]: 937/1768 cut-off events. [2024-06-21 16:23:12,771 INFO L125 PetriNetUnfolderBase]: For 379990/379990 co-relation queries the response was YES. [2024-06-21 16:23:12,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12412 conditions, 1768 events. 937/1768 cut-off events. For 379990/379990 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 11037 event pairs, 100 based on Foata normal form. 2/1769 useless extension candidates. Maximal degree in co-relation 12198. Up to 1582 conditions per place. [2024-06-21 16:23:12,797 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 334 selfloop transitions, 43 changer transitions 0/379 dead transitions. [2024-06-21 16:23:12,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 379 transitions, 4549 flow [2024-06-21 16:23:12,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 16:23:12,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693181818181818 [2024-06-21 16:23:12,798 INFO L175 Difference]: Start difference. First operand has 481 places, 363 transitions, 3753 flow. Second operand 11 states and 130 transitions. [2024-06-21 16:23:12,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 379 transitions, 4549 flow [2024-06-21 16:23:14,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 379 transitions, 4401 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-21 16:23:14,469 INFO L231 Difference]: Finished difference. Result has 484 places, 363 transitions, 3695 flow [2024-06-21 16:23:14,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3605, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3695, PETRI_PLACES=484, PETRI_TRANSITIONS=363} [2024-06-21 16:23:14,471 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 453 predicate places. [2024-06-21 16:23:14,481 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 363 transitions, 3695 flow [2024-06-21 16:23:14,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:14,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:14,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:14,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-21 16:23:14,482 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:14,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:14,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1347776744, now seen corresponding path program 29 times [2024-06-21 16:23:14,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:14,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778211323] [2024-06-21 16:23:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:14,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:15,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:15,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:15,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778211323] [2024-06-21 16:23:15,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778211323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:15,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:15,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:23:15,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590470982] [2024-06-21 16:23:15,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:15,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:23:15,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:15,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:23:15,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:23:15,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:23:15,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 363 transitions, 3695 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:15,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:15,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:23:15,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:15,970 INFO L124 PetriNetUnfolderBase]: 941/1776 cut-off events. [2024-06-21 16:23:15,988 INFO L125 PetriNetUnfolderBase]: For 383533/383533 co-relation queries the response was YES. [2024-06-21 16:23:16,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12418 conditions, 1776 events. 941/1776 cut-off events. For 383533/383533 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 11081 event pairs, 102 based on Foata normal form. 2/1777 useless extension candidates. Maximal degree in co-relation 12203. Up to 1726 conditions per place. [2024-06-21 16:23:16,014 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 359 selfloop transitions, 17 changer transitions 0/378 dead transitions. [2024-06-21 16:23:16,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 378 transitions, 4519 flow [2024-06-21 16:23:16,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:16,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:16,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-21 16:23:16,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32954545454545453 [2024-06-21 16:23:16,015 INFO L175 Difference]: Start difference. First operand has 484 places, 363 transitions, 3695 flow. Second operand 11 states and 116 transitions. [2024-06-21 16:23:16,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 378 transitions, 4519 flow [2024-06-21 16:23:17,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 378 transitions, 4375 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 16:23:17,753 INFO L231 Difference]: Finished difference. Result has 484 places, 364 transitions, 3633 flow [2024-06-21 16:23:17,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3551, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3633, PETRI_PLACES=484, PETRI_TRANSITIONS=364} [2024-06-21 16:23:17,753 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 453 predicate places. [2024-06-21 16:23:17,754 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 364 transitions, 3633 flow [2024-06-21 16:23:17,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:17,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:17,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:17,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-21 16:23:17,754 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:17,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:17,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1110576189, now seen corresponding path program 1 times [2024-06-21 16:23:17,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:17,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120048145] [2024-06-21 16:23:17,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:17,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:18,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:18,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120048145] [2024-06-21 16:23:18,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120048145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:18,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:18,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:23:18,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9651841] [2024-06-21 16:23:18,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:18,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:23:18,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:18,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:23:18,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:23:18,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:23:18,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 364 transitions, 3633 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:18,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:18,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:23:18,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:19,292 INFO L124 PetriNetUnfolderBase]: 939/1773 cut-off events. [2024-06-21 16:23:19,293 INFO L125 PetriNetUnfolderBase]: For 355420/355420 co-relation queries the response was YES. [2024-06-21 16:23:19,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12060 conditions, 1773 events. 939/1773 cut-off events. For 355420/355420 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 11098 event pairs, 102 based on Foata normal form. 1/1773 useless extension candidates. Maximal degree in co-relation 11845. Up to 1711 conditions per place. [2024-06-21 16:23:19,318 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 348 selfloop transitions, 28 changer transitions 0/378 dead transitions. [2024-06-21 16:23:19,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 378 transitions, 4423 flow [2024-06-21 16:23:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:19,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 16:23:19,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2024-06-21 16:23:19,320 INFO L175 Difference]: Start difference. First operand has 484 places, 364 transitions, 3633 flow. Second operand 11 states and 120 transitions. [2024-06-21 16:23:19,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 378 transitions, 4423 flow [2024-06-21 16:23:20,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 378 transitions, 4305 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-06-21 16:23:20,863 INFO L231 Difference]: Finished difference. Result has 486 places, 364 transitions, 3579 flow [2024-06-21 16:23:20,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3515, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3579, PETRI_PLACES=486, PETRI_TRANSITIONS=364} [2024-06-21 16:23:20,863 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 455 predicate places. [2024-06-21 16:23:20,864 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 364 transitions, 3579 flow [2024-06-21 16:23:20,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:20,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:20,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:20,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-21 16:23:20,864 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:20,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:20,864 INFO L85 PathProgramCache]: Analyzing trace with hash -910745230, now seen corresponding path program 30 times [2024-06-21 16:23:20,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:20,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702043810] [2024-06-21 16:23:20,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:20,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:21,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:21,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702043810] [2024-06-21 16:23:21,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702043810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:21,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:21,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:23:21,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892107050] [2024-06-21 16:23:21,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:21,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:23:21,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:21,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:23:21,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:23:21,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:23:21,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 364 transitions, 3579 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:21,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:21,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:23:21,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:22,614 INFO L124 PetriNetUnfolderBase]: 943/1781 cut-off events. [2024-06-21 16:23:22,614 INFO L125 PetriNetUnfolderBase]: For 374700/374700 co-relation queries the response was YES. [2024-06-21 16:23:22,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12092 conditions, 1781 events. 943/1781 cut-off events. For 374700/374700 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 11159 event pairs, 106 based on Foata normal form. 2/1782 useless extension candidates. Maximal degree in co-relation 11876. Up to 1722 conditions per place. [2024-06-21 16:23:22,640 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 352 selfloop transitions, 25 changer transitions 0/379 dead transitions. [2024-06-21 16:23:22,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 379 transitions, 4413 flow [2024-06-21 16:23:22,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:22,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:22,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-21 16:23:22,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3380681818181818 [2024-06-21 16:23:22,641 INFO L175 Difference]: Start difference. First operand has 486 places, 364 transitions, 3579 flow. Second operand 11 states and 119 transitions. [2024-06-21 16:23:22,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 379 transitions, 4413 flow [2024-06-21 16:23:23,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 379 transitions, 4243 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-21 16:23:23,960 INFO L231 Difference]: Finished difference. Result has 484 places, 365 transitions, 3510 flow [2024-06-21 16:23:23,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3409, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3510, PETRI_PLACES=484, PETRI_TRANSITIONS=365} [2024-06-21 16:23:23,961 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 453 predicate places. [2024-06-21 16:23:23,961 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 365 transitions, 3510 flow [2024-06-21 16:23:23,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:23,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:23,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:23,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-21 16:23:23,961 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:23,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:23,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1727668110, now seen corresponding path program 31 times [2024-06-21 16:23:23,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:23,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116164902] [2024-06-21 16:23:23,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:23,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:25,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:25,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116164902] [2024-06-21 16:23:25,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116164902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:25,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:25,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:23:25,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537873695] [2024-06-21 16:23:25,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:25,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:23:25,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:25,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:23:25,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:23:25,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:23:25,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 365 transitions, 3510 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:25,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:25,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:23:25,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:25,753 INFO L124 PetriNetUnfolderBase]: 954/1802 cut-off events. [2024-06-21 16:23:25,753 INFO L125 PetriNetUnfolderBase]: For 414004/414004 co-relation queries the response was YES. [2024-06-21 16:23:25,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12659 conditions, 1802 events. 954/1802 cut-off events. For 414004/414004 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 11318 event pairs, 106 based on Foata normal form. 2/1803 useless extension candidates. Maximal degree in co-relation 12442. Up to 1670 conditions per place. [2024-06-21 16:23:25,783 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 351 selfloop transitions, 29 changer transitions 0/382 dead transitions. [2024-06-21 16:23:25,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 382 transitions, 4764 flow [2024-06-21 16:23:25,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:25,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:25,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 16:23:25,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3494318181818182 [2024-06-21 16:23:25,785 INFO L175 Difference]: Start difference. First operand has 484 places, 365 transitions, 3510 flow. Second operand 11 states and 123 transitions. [2024-06-21 16:23:25,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 382 transitions, 4764 flow [2024-06-21 16:23:27,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 382 transitions, 4675 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-21 16:23:27,726 INFO L231 Difference]: Finished difference. Result has 486 places, 367 transitions, 3577 flow [2024-06-21 16:23:27,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3421, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3577, PETRI_PLACES=486, PETRI_TRANSITIONS=367} [2024-06-21 16:23:27,727 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 455 predicate places. [2024-06-21 16:23:27,727 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 367 transitions, 3577 flow [2024-06-21 16:23:27,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:27,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:27,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:27,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-21 16:23:27,728 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:27,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:27,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1986282510, now seen corresponding path program 32 times [2024-06-21 16:23:27,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:27,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128200939] [2024-06-21 16:23:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:27,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:28,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:28,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128200939] [2024-06-21 16:23:28,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128200939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:28,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:28,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:23:28,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912856665] [2024-06-21 16:23:28,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:28,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:23:28,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:28,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:23:28,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:23:28,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:23:28,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 367 transitions, 3577 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:28,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:28,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:23:28,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:29,533 INFO L124 PetriNetUnfolderBase]: 958/1810 cut-off events. [2024-06-21 16:23:29,533 INFO L125 PetriNetUnfolderBase]: For 418638/418638 co-relation queries the response was YES. [2024-06-21 16:23:29,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12742 conditions, 1810 events. 958/1810 cut-off events. For 418638/418638 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 11431 event pairs, 109 based on Foata normal form. 2/1811 useless extension candidates. Maximal degree in co-relation 12524. Up to 1739 conditions per place. [2024-06-21 16:23:29,560 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 356 selfloop transitions, 25 changer transitions 0/383 dead transitions. [2024-06-21 16:23:29,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 383 transitions, 4427 flow [2024-06-21 16:23:29,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:29,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:29,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 16:23:29,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3494318181818182 [2024-06-21 16:23:29,562 INFO L175 Difference]: Start difference. First operand has 486 places, 367 transitions, 3577 flow. Second operand 11 states and 123 transitions. [2024-06-21 16:23:29,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 383 transitions, 4427 flow [2024-06-21 16:23:31,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 383 transitions, 4340 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 16:23:31,533 INFO L231 Difference]: Finished difference. Result has 490 places, 368 transitions, 3594 flow [2024-06-21 16:23:31,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3594, PETRI_PLACES=490, PETRI_TRANSITIONS=368} [2024-06-21 16:23:31,533 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 459 predicate places. [2024-06-21 16:23:31,533 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 368 transitions, 3594 flow [2024-06-21 16:23:31,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:31,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:31,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:31,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-21 16:23:31,534 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:31,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:31,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1993907146, now seen corresponding path program 20 times [2024-06-21 16:23:31,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:31,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101382337] [2024-06-21 16:23:31,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:31,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:32,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:32,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101382337] [2024-06-21 16:23:32,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101382337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:32,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:32,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:23:32,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207906539] [2024-06-21 16:23:32,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:32,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:23:32,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:32,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:23:32,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:23:32,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:23:32,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 368 transitions, 3594 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:32,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:32,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:23:32,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:33,132 INFO L124 PetriNetUnfolderBase]: 954/1804 cut-off events. [2024-06-21 16:23:33,133 INFO L125 PetriNetUnfolderBase]: For 387208/387208 co-relation queries the response was YES. [2024-06-21 16:23:33,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12215 conditions, 1804 events. 954/1804 cut-off events. For 387208/387208 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 11393 event pairs, 97 based on Foata normal form. 2/1805 useless extension candidates. Maximal degree in co-relation 11995. Up to 1640 conditions per place. [2024-06-21 16:23:33,163 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 333 selfloop transitions, 54 changer transitions 1/390 dead transitions. [2024-06-21 16:23:33,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 390 transitions, 4948 flow [2024-06-21 16:23:33,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:23:33,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:23:33,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 146 transitions. [2024-06-21 16:23:33,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35096153846153844 [2024-06-21 16:23:33,165 INFO L175 Difference]: Start difference. First operand has 490 places, 368 transitions, 3594 flow. Second operand 13 states and 146 transitions. [2024-06-21 16:23:33,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 390 transitions, 4948 flow [2024-06-21 16:23:35,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 390 transitions, 4775 flow, removed 63 selfloop flow, removed 8 redundant places. [2024-06-21 16:23:35,167 INFO L231 Difference]: Finished difference. Result has 496 places, 370 transitions, 3696 flow [2024-06-21 16:23:35,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3421, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3696, PETRI_PLACES=496, PETRI_TRANSITIONS=370} [2024-06-21 16:23:35,168 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 465 predicate places. [2024-06-21 16:23:35,168 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 370 transitions, 3696 flow [2024-06-21 16:23:35,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:35,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:35,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:35,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-21 16:23:35,168 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:35,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:35,169 INFO L85 PathProgramCache]: Analyzing trace with hash -910735930, now seen corresponding path program 33 times [2024-06-21 16:23:35,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:35,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314621710] [2024-06-21 16:23:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:35,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:36,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:36,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314621710] [2024-06-21 16:23:36,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314621710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:36,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:36,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:23:36,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710051635] [2024-06-21 16:23:36,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:36,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:23:36,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:36,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:23:36,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:23:36,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:23:36,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 370 transitions, 3696 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:36,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:36,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:23:36,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:37,362 INFO L124 PetriNetUnfolderBase]: 966/1828 cut-off events. [2024-06-21 16:23:37,363 INFO L125 PetriNetUnfolderBase]: For 388698/388698 co-relation queries the response was YES. [2024-06-21 16:23:37,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12295 conditions, 1828 events. 966/1828 cut-off events. For 388698/388698 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 11598 event pairs, 110 based on Foata normal form. 2/1829 useless extension candidates. Maximal degree in co-relation 12073. Up to 1769 conditions per place. [2024-06-21 16:23:37,387 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 366 selfloop transitions, 19 changer transitions 0/387 dead transitions. [2024-06-21 16:23:37,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 387 transitions, 4555 flow [2024-06-21 16:23:37,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:37,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:37,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-21 16:23:37,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3380681818181818 [2024-06-21 16:23:37,388 INFO L175 Difference]: Start difference. First operand has 496 places, 370 transitions, 3696 flow. Second operand 11 states and 119 transitions. [2024-06-21 16:23:37,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 387 transitions, 4555 flow [2024-06-21 16:23:39,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 387 transitions, 4376 flow, removed 29 selfloop flow, removed 11 redundant places. [2024-06-21 16:23:39,241 INFO L231 Difference]: Finished difference. Result has 497 places, 373 transitions, 3624 flow [2024-06-21 16:23:39,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3517, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3624, PETRI_PLACES=497, PETRI_TRANSITIONS=373} [2024-06-21 16:23:39,242 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 466 predicate places. [2024-06-21 16:23:39,242 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 373 transitions, 3624 flow [2024-06-21 16:23:39,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:39,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:39,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:39,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-21 16:23:39,244 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:39,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:39,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1963156768, now seen corresponding path program 34 times [2024-06-21 16:23:39,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:39,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100178647] [2024-06-21 16:23:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:39,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:40,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:40,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100178647] [2024-06-21 16:23:40,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100178647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:40,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:40,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:23:40,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386170887] [2024-06-21 16:23:40,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:40,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:23:40,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:40,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:23:40,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:23:40,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:23:40,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 373 transitions, 3624 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:40,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:40,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:23:40,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:41,052 INFO L124 PetriNetUnfolderBase]: 963/1823 cut-off events. [2024-06-21 16:23:41,052 INFO L125 PetriNetUnfolderBase]: For 356467/356467 co-relation queries the response was YES. [2024-06-21 16:23:41,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11724 conditions, 1823 events. 963/1823 cut-off events. For 356467/356467 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 11577 event pairs, 106 based on Foata normal form. 2/1824 useless extension candidates. Maximal degree in co-relation 11500. Up to 1732 conditions per place. [2024-06-21 16:23:41,079 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 359 selfloop transitions, 27 changer transitions 0/388 dead transitions. [2024-06-21 16:23:41,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 388 transitions, 4434 flow [2024-06-21 16:23:41,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:41,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:41,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 16:23:41,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3494318181818182 [2024-06-21 16:23:41,080 INFO L175 Difference]: Start difference. First operand has 497 places, 373 transitions, 3624 flow. Second operand 11 states and 123 transitions. [2024-06-21 16:23:41,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 388 transitions, 4434 flow [2024-06-21 16:23:42,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 388 transitions, 4324 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-21 16:23:42,726 INFO L231 Difference]: Finished difference. Result has 500 places, 373 transitions, 3572 flow [2024-06-21 16:23:42,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3514, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3572, PETRI_PLACES=500, PETRI_TRANSITIONS=373} [2024-06-21 16:23:42,727 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 469 predicate places. [2024-06-21 16:23:42,727 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 373 transitions, 3572 flow [2024-06-21 16:23:42,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:42,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:42,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:42,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-21 16:23:42,728 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:42,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:42,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1401296160, now seen corresponding path program 35 times [2024-06-21 16:23:42,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:42,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709509092] [2024-06-21 16:23:42,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:42,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:43,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:43,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709509092] [2024-06-21 16:23:43,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709509092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:43,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:43,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:23:43,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132032388] [2024-06-21 16:23:43,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:43,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:23:43,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:43,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:23:43,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:23:43,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:23:43,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 373 transitions, 3572 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:43,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:43,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:23:43,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:44,330 INFO L124 PetriNetUnfolderBase]: 967/1831 cut-off events. [2024-06-21 16:23:44,330 INFO L125 PetriNetUnfolderBase]: For 359505/359505 co-relation queries the response was YES. [2024-06-21 16:23:44,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11733 conditions, 1831 events. 967/1831 cut-off events. For 359505/359505 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 11621 event pairs, 109 based on Foata normal form. 2/1832 useless extension candidates. Maximal degree in co-relation 11508. Up to 1740 conditions per place. [2024-06-21 16:23:44,358 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 358 selfloop transitions, 28 changer transitions 0/388 dead transitions. [2024-06-21 16:23:44,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 388 transitions, 4428 flow [2024-06-21 16:23:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:44,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 16:23:44,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2024-06-21 16:23:44,359 INFO L175 Difference]: Start difference. First operand has 500 places, 373 transitions, 3572 flow. Second operand 11 states and 120 transitions. [2024-06-21 16:23:44,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 388 transitions, 4428 flow [2024-06-21 16:23:46,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 388 transitions, 4356 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 16:23:46,102 INFO L231 Difference]: Finished difference. Result has 501 places, 374 transitions, 3614 flow [2024-06-21 16:23:46,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3500, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3614, PETRI_PLACES=501, PETRI_TRANSITIONS=374} [2024-06-21 16:23:46,103 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 470 predicate places. [2024-06-21 16:23:46,103 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 374 transitions, 3614 flow [2024-06-21 16:23:46,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:46,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:46,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:46,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-21 16:23:46,103 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:46,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:46,104 INFO L85 PathProgramCache]: Analyzing trace with hash 2004522580, now seen corresponding path program 21 times [2024-06-21 16:23:46,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:46,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525179019] [2024-06-21 16:23:46,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:46,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:47,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:47,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525179019] [2024-06-21 16:23:47,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525179019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:47,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:47,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:23:47,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305670954] [2024-06-21 16:23:47,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:47,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:23:47,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:47,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:23:47,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:23:47,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:23:47,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 374 transitions, 3614 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:47,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:47,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:23:47,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:47,960 INFO L124 PetriNetUnfolderBase]: 963/1825 cut-off events. [2024-06-21 16:23:47,960 INFO L125 PetriNetUnfolderBase]: For 327347/327347 co-relation queries the response was YES. [2024-06-21 16:23:47,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11252 conditions, 1825 events. 963/1825 cut-off events. For 327347/327347 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 11587 event pairs, 110 based on Foata normal form. 2/1826 useless extension candidates. Maximal degree in co-relation 11026. Up to 1753 conditions per place. [2024-06-21 16:23:47,985 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 358 selfloop transitions, 30 changer transitions 0/390 dead transitions. [2024-06-21 16:23:47,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 390 transitions, 4434 flow [2024-06-21 16:23:47,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:23:47,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:23:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-06-21 16:23:47,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3385416666666667 [2024-06-21 16:23:47,986 INFO L175 Difference]: Start difference. First operand has 501 places, 374 transitions, 3614 flow. Second operand 12 states and 130 transitions. [2024-06-21 16:23:47,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 390 transitions, 4434 flow [2024-06-21 16:23:50,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 390 transitions, 4214 flow, removed 84 selfloop flow, removed 9 redundant places. [2024-06-21 16:23:50,029 INFO L231 Difference]: Finished difference. Result has 504 places, 374 transitions, 3460 flow [2024-06-21 16:23:50,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3394, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3460, PETRI_PLACES=504, PETRI_TRANSITIONS=374} [2024-06-21 16:23:50,030 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 473 predicate places. [2024-06-21 16:23:50,030 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 374 transitions, 3460 flow [2024-06-21 16:23:50,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:50,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:50,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:50,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-21 16:23:50,030 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:50,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:50,031 INFO L85 PathProgramCache]: Analyzing trace with hash -739680974, now seen corresponding path program 36 times [2024-06-21 16:23:50,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:50,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723231309] [2024-06-21 16:23:50,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:50,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:50,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:50,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723231309] [2024-06-21 16:23:50,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723231309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:50,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:50,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:23:50,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264439651] [2024-06-21 16:23:50,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:50,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:23:50,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:50,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:23:50,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:23:51,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:23:51,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 374 transitions, 3460 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:51,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:51,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:23:51,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:51,685 INFO L124 PetriNetUnfolderBase]: 960/1820 cut-off events. [2024-06-21 16:23:51,686 INFO L125 PetriNetUnfolderBase]: For 287675/287675 co-relation queries the response was YES. [2024-06-21 16:23:51,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10549 conditions, 1820 events. 960/1820 cut-off events. For 287675/287675 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 11548 event pairs, 111 based on Foata normal form. 2/1821 useless extension candidates. Maximal degree in co-relation 10322. Up to 1705 conditions per place. [2024-06-21 16:23:51,714 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 358 selfloop transitions, 28 changer transitions 0/388 dead transitions. [2024-06-21 16:23:51,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 388 transitions, 4264 flow [2024-06-21 16:23:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:23:51,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:23:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-06-21 16:23:51,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-21 16:23:51,715 INFO L175 Difference]: Start difference. First operand has 504 places, 374 transitions, 3460 flow. Second operand 12 states and 128 transitions. [2024-06-21 16:23:51,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 388 transitions, 4264 flow [2024-06-21 16:23:54,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 388 transitions, 4190 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 16:23:54,169 INFO L231 Difference]: Finished difference. Result has 505 places, 374 transitions, 3446 flow [2024-06-21 16:23:54,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3446, PETRI_PLACES=505, PETRI_TRANSITIONS=374} [2024-06-21 16:23:54,169 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 474 predicate places. [2024-06-21 16:23:54,169 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 374 transitions, 3446 flow [2024-06-21 16:23:54,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:54,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:54,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:54,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-21 16:23:54,171 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:54,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:54,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1970790859, now seen corresponding path program 26 times [2024-06-21 16:23:54,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:54,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287804461] [2024-06-21 16:23:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:54,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:54,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:54,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287804461] [2024-06-21 16:23:54,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287804461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:54,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:54,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:23:54,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326043073] [2024-06-21 16:23:54,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:54,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:23:54,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:54,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:23:54,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:23:55,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:23:55,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 374 transitions, 3446 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:55,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:55,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:23:55,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:55,755 INFO L124 PetriNetUnfolderBase]: 977/1859 cut-off events. [2024-06-21 16:23:55,755 INFO L125 PetriNetUnfolderBase]: For 468576/468576 co-relation queries the response was YES. [2024-06-21 16:23:55,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10523 conditions, 1859 events. 977/1859 cut-off events. For 468576/468576 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 11810 event pairs, 110 based on Foata normal form. 14/1872 useless extension candidates. Maximal degree in co-relation 10295. Up to 1704 conditions per place. [2024-06-21 16:23:55,786 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 354 selfloop transitions, 25 changer transitions 16/397 dead transitions. [2024-06-21 16:23:55,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 397 transitions, 4460 flow [2024-06-21 16:23:55,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:23:55,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:23:55,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 16:23:55,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619791666666667 [2024-06-21 16:23:55,787 INFO L175 Difference]: Start difference. First operand has 505 places, 374 transitions, 3446 flow. Second operand 12 states and 139 transitions. [2024-06-21 16:23:55,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 397 transitions, 4460 flow [2024-06-21 16:23:58,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 397 transitions, 4126 flow, removed 44 selfloop flow, removed 14 redundant places. [2024-06-21 16:23:58,134 INFO L231 Difference]: Finished difference. Result has 503 places, 366 transitions, 3101 flow [2024-06-21 16:23:58,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3112, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3101, PETRI_PLACES=503, PETRI_TRANSITIONS=366} [2024-06-21 16:23:58,134 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 472 predicate places. [2024-06-21 16:23:58,134 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 366 transitions, 3101 flow [2024-06-21 16:23:58,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 16:23:58,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:58,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:58,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-21 16:23:58,135 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:58,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:58,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1388111830, now seen corresponding path program 1 times [2024-06-21 16:23:58,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:58,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141562044] [2024-06-21 16:23:58,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:58,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:59,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:59,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141562044] [2024-06-21 16:23:59,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141562044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:59,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:59,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:23:59,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640999019] [2024-06-21 16:23:59,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:59,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:23:59,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:59,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:23:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:23:59,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:23:59,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 366 transitions, 3101 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:59,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:59,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:23:59,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:00,179 INFO L124 PetriNetUnfolderBase]: 964/1844 cut-off events. [2024-06-21 16:24:00,179 INFO L125 PetriNetUnfolderBase]: For 538479/538479 co-relation queries the response was YES. [2024-06-21 16:24:00,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11978 conditions, 1844 events. 964/1844 cut-off events. For 538479/538479 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 11662 event pairs, 127 based on Foata normal form. 8/1851 useless extension candidates. Maximal degree in co-relation 11752. Up to 1559 conditions per place. [2024-06-21 16:24:00,204 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 363 selfloop transitions, 26 changer transitions 16/407 dead transitions. [2024-06-21 16:24:00,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 407 transitions, 4627 flow [2024-06-21 16:24:00,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:24:00,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:24:00,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 169 transitions. [2024-06-21 16:24:00,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37723214285714285 [2024-06-21 16:24:00,207 INFO L175 Difference]: Start difference. First operand has 503 places, 366 transitions, 3101 flow. Second operand 14 states and 169 transitions. [2024-06-21 16:24:00,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 407 transitions, 4627 flow [2024-06-21 16:24:02,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 407 transitions, 4339 flow, removed 9 selfloop flow, removed 17 redundant places. [2024-06-21 16:24:02,979 INFO L231 Difference]: Finished difference. Result has 500 places, 362 transitions, 2854 flow [2024-06-21 16:24:02,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2819, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2854, PETRI_PLACES=500, PETRI_TRANSITIONS=362} [2024-06-21 16:24:02,979 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 469 predicate places. [2024-06-21 16:24:02,979 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 362 transitions, 2854 flow [2024-06-21 16:24:02,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:02,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:02,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:02,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-21 16:24:02,980 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:02,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:02,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1729699218, now seen corresponding path program 2 times [2024-06-21 16:24:02,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:02,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289147792] [2024-06-21 16:24:02,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:02,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:03,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:03,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289147792] [2024-06-21 16:24:03,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289147792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:03,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:03,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:24:03,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699730706] [2024-06-21 16:24:03,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:03,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:24:03,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:03,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:24:03,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:24:04,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:24:04,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 362 transitions, 2854 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:04,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:04,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:24:04,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:04,870 INFO L124 PetriNetUnfolderBase]: 1031/1971 cut-off events. [2024-06-21 16:24:04,870 INFO L125 PetriNetUnfolderBase]: For 717719/717719 co-relation queries the response was YES. [2024-06-21 16:24:04,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14511 conditions, 1971 events. 1031/1971 cut-off events. For 717719/717719 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 12486 event pairs, 167 based on Foata normal form. 8/1978 useless extension candidates. Maximal degree in co-relation 14287. Up to 1793 conditions per place. [2024-06-21 16:24:04,899 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 384 selfloop transitions, 28 changer transitions 7/421 dead transitions. [2024-06-21 16:24:04,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 421 transitions, 4589 flow [2024-06-21 16:24:04,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 16:24:04,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 16:24:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 167 transitions. [2024-06-21 16:24:04,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34791666666666665 [2024-06-21 16:24:04,900 INFO L175 Difference]: Start difference. First operand has 500 places, 362 transitions, 2854 flow. Second operand 15 states and 167 transitions. [2024-06-21 16:24:04,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 421 transitions, 4589 flow [2024-06-21 16:24:08,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 421 transitions, 4501 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-21 16:24:08,859 INFO L231 Difference]: Finished difference. Result has 505 places, 384 transitions, 3095 flow [2024-06-21 16:24:08,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2805, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3095, PETRI_PLACES=505, PETRI_TRANSITIONS=384} [2024-06-21 16:24:08,860 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 474 predicate places. [2024-06-21 16:24:08,860 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 384 transitions, 3095 flow [2024-06-21 16:24:08,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:08,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:08,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:08,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-21 16:24:08,860 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:08,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:08,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1329899410, now seen corresponding path program 3 times [2024-06-21 16:24:08,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:08,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104908141] [2024-06-21 16:24:08,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:08,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:09,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:09,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104908141] [2024-06-21 16:24:09,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104908141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:09,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:09,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:24:09,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086026853] [2024-06-21 16:24:09,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:09,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:24:09,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:09,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:24:09,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:24:10,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:24:10,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 384 transitions, 3095 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:10,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:10,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:24:10,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:10,847 INFO L124 PetriNetUnfolderBase]: 1016/1944 cut-off events. [2024-06-21 16:24:10,847 INFO L125 PetriNetUnfolderBase]: For 733339/733342 co-relation queries the response was YES. [2024-06-21 16:24:10,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12588 conditions, 1944 events. 1016/1944 cut-off events. For 733339/733342 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 12326 event pairs, 135 based on Foata normal form. 22/1965 useless extension candidates. Maximal degree in co-relation 12358. Up to 1706 conditions per place. [2024-06-21 16:24:10,879 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 355 selfloop transitions, 45 changer transitions 14/416 dead transitions. [2024-06-21 16:24:10,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 416 transitions, 4157 flow [2024-06-21 16:24:10,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:24:10,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:24:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 161 transitions. [2024-06-21 16:24:10,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.359375 [2024-06-21 16:24:10,880 INFO L175 Difference]: Start difference. First operand has 505 places, 384 transitions, 3095 flow. Second operand 14 states and 161 transitions. [2024-06-21 16:24:10,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 416 transitions, 4157 flow [2024-06-21 16:24:12,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 416 transitions, 4129 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:24:12,812 INFO L231 Difference]: Finished difference. Result has 512 places, 378 transitions, 3112 flow [2024-06-21 16:24:12,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3067, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3112, PETRI_PLACES=512, PETRI_TRANSITIONS=378} [2024-06-21 16:24:12,813 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 481 predicate places. [2024-06-21 16:24:12,813 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 378 transitions, 3112 flow [2024-06-21 16:24:12,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:12,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:12,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:12,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-21 16:24:12,814 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:12,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:12,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1330019380, now seen corresponding path program 4 times [2024-06-21 16:24:12,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:12,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82897518] [2024-06-21 16:24:12,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:12,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:13,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:13,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82897518] [2024-06-21 16:24:13,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82897518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:13,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:13,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:24:13,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917842375] [2024-06-21 16:24:13,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:13,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:24:13,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:13,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:24:13,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:24:13,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:24:13,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 378 transitions, 3112 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:13,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:13,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:24:13,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:14,722 INFO L124 PetriNetUnfolderBase]: 1009/1935 cut-off events. [2024-06-21 16:24:14,723 INFO L125 PetriNetUnfolderBase]: For 656662/656665 co-relation queries the response was YES. [2024-06-21 16:24:14,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13871 conditions, 1935 events. 1009/1935 cut-off events. For 656662/656665 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 12241 event pairs, 143 based on Foata normal form. 10/1944 useless extension candidates. Maximal degree in co-relation 13642. Up to 1692 conditions per place. [2024-06-21 16:24:14,754 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 361 selfloop transitions, 40 changer transitions 13/416 dead transitions. [2024-06-21 16:24:14,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 416 transitions, 4565 flow [2024-06-21 16:24:14,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:24:14,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:24:14,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 164 transitions. [2024-06-21 16:24:14,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-21 16:24:14,755 INFO L175 Difference]: Start difference. First operand has 512 places, 378 transitions, 3112 flow. Second operand 14 states and 164 transitions. [2024-06-21 16:24:14,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 416 transitions, 4565 flow [2024-06-21 16:24:17,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 416 transitions, 4465 flow, removed 5 selfloop flow, removed 14 redundant places. [2024-06-21 16:24:17,718 INFO L231 Difference]: Finished difference. Result has 509 places, 374 transitions, 3058 flow [2024-06-21 16:24:17,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3016, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3058, PETRI_PLACES=509, PETRI_TRANSITIONS=374} [2024-06-21 16:24:17,718 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 478 predicate places. [2024-06-21 16:24:17,719 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 374 transitions, 3058 flow [2024-06-21 16:24:17,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:17,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:17,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:17,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-21 16:24:17,719 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:17,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:17,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1362015350, now seen corresponding path program 5 times [2024-06-21 16:24:17,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:17,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855515872] [2024-06-21 16:24:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:17,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:18,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:18,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855515872] [2024-06-21 16:24:18,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855515872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:18,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:18,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:24:18,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64196029] [2024-06-21 16:24:18,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:18,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:24:18,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:18,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:24:18,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:24:18,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:24:18,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 374 transitions, 3058 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:18,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:18,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:24:18,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:19,560 INFO L124 PetriNetUnfolderBase]: 998/1915 cut-off events. [2024-06-21 16:24:19,560 INFO L125 PetriNetUnfolderBase]: For 687604/687607 co-relation queries the response was YES. [2024-06-21 16:24:19,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13881 conditions, 1915 events. 998/1915 cut-off events. For 687604/687607 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 12093 event pairs, 149 based on Foata normal form. 12/1926 useless extension candidates. Maximal degree in co-relation 13652. Up to 1775 conditions per place. [2024-06-21 16:24:19,589 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 362 selfloop transitions, 27 changer transitions 13/404 dead transitions. [2024-06-21 16:24:19,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 404 transitions, 4090 flow [2024-06-21 16:24:19,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:24:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:24:19,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 148 transitions. [2024-06-21 16:24:19,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3557692307692308 [2024-06-21 16:24:19,590 INFO L175 Difference]: Start difference. First operand has 509 places, 374 transitions, 3058 flow. Second operand 13 states and 148 transitions. [2024-06-21 16:24:19,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 404 transitions, 4090 flow [2024-06-21 16:24:23,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 404 transitions, 4000 flow, removed 5 selfloop flow, removed 14 redundant places. [2024-06-21 16:24:23,097 INFO L231 Difference]: Finished difference. Result has 505 places, 369 transitions, 2987 flow [2024-06-21 16:24:23,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2968, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2987, PETRI_PLACES=505, PETRI_TRANSITIONS=369} [2024-06-21 16:24:23,098 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 474 predicate places. [2024-06-21 16:24:23,098 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 369 transitions, 2987 flow [2024-06-21 16:24:23,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:23,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:23,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:23,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-21 16:24:23,098 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:23,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:23,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1362010700, now seen corresponding path program 6 times [2024-06-21 16:24:23,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:23,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200591755] [2024-06-21 16:24:23,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:23,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:24,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:24,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200591755] [2024-06-21 16:24:24,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200591755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:24,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:24,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:24:24,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166880390] [2024-06-21 16:24:24,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:24,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:24:24,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:24,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:24:24,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:24:24,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:24:24,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 369 transitions, 2987 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:24,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:24,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:24:24,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:24,902 INFO L124 PetriNetUnfolderBase]: 982/1893 cut-off events. [2024-06-21 16:24:24,902 INFO L125 PetriNetUnfolderBase]: For 649400/649400 co-relation queries the response was YES. [2024-06-21 16:24:24,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13586 conditions, 1893 events. 982/1893 cut-off events. For 649400/649400 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 11993 event pairs, 178 based on Foata normal form. 8/1900 useless extension candidates. Maximal degree in co-relation 13360. Up to 1815 conditions per place. [2024-06-21 16:24:24,930 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 363 selfloop transitions, 14 changer transitions 13/392 dead transitions. [2024-06-21 16:24:24,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 392 transitions, 3902 flow [2024-06-21 16:24:24,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:24:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:24:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 137 transitions. [2024-06-21 16:24:24,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3293269230769231 [2024-06-21 16:24:24,932 INFO L175 Difference]: Start difference. First operand has 505 places, 369 transitions, 2987 flow. Second operand 13 states and 137 transitions. [2024-06-21 16:24:24,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 392 transitions, 3902 flow [2024-06-21 16:24:27,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 392 transitions, 3842 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 16:24:27,714 INFO L231 Difference]: Finished difference. Result has 505 places, 367 transitions, 2941 flow [2024-06-21 16:24:27,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2929, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2941, PETRI_PLACES=505, PETRI_TRANSITIONS=367} [2024-06-21 16:24:27,714 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 474 predicate places. [2024-06-21 16:24:27,715 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 367 transitions, 2941 flow [2024-06-21 16:24:27,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:27,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:27,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:27,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-21 16:24:27,715 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:27,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:27,716 INFO L85 PathProgramCache]: Analyzing trace with hash 483686050, now seen corresponding path program 7 times [2024-06-21 16:24:27,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:27,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371084017] [2024-06-21 16:24:27,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:27,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:28,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:28,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371084017] [2024-06-21 16:24:28,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371084017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:28,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:28,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:24:28,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680266645] [2024-06-21 16:24:28,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:28,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:24:28,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:28,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:24:28,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:24:29,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:24:29,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 367 transitions, 2941 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:29,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:29,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:24:29,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:29,784 INFO L124 PetriNetUnfolderBase]: 974/1875 cut-off events. [2024-06-21 16:24:29,785 INFO L125 PetriNetUnfolderBase]: For 643086/643089 co-relation queries the response was YES. [2024-06-21 16:24:29,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13458 conditions, 1875 events. 974/1875 cut-off events. For 643086/643089 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 11809 event pairs, 143 based on Foata normal form. 10/1884 useless extension candidates. Maximal degree in co-relation 13231. Up to 1636 conditions per place. [2024-06-21 16:24:29,813 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 360 selfloop transitions, 30 changer transitions 11/403 dead transitions. [2024-06-21 16:24:29,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 403 transitions, 4431 flow [2024-06-21 16:24:29,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:24:29,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:24:29,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 156 transitions. [2024-06-21 16:24:29,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 16:24:29,814 INFO L175 Difference]: Start difference. First operand has 505 places, 367 transitions, 2941 flow. Second operand 13 states and 156 transitions. [2024-06-21 16:24:29,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 403 transitions, 4431 flow [2024-06-21 16:24:32,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 403 transitions, 4393 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 16:24:32,594 INFO L231 Difference]: Finished difference. Result has 504 places, 363 transitions, 2940 flow [2024-06-21 16:24:32,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2905, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2940, PETRI_PLACES=504, PETRI_TRANSITIONS=363} [2024-06-21 16:24:32,595 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 473 predicate places. [2024-06-21 16:24:32,595 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 363 transitions, 2940 flow [2024-06-21 16:24:32,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:32,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:32,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:32,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-21 16:24:32,595 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:32,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:32,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2142048190, now seen corresponding path program 8 times [2024-06-21 16:24:32,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:32,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47376344] [2024-06-21 16:24:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:32,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:33,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:33,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47376344] [2024-06-21 16:24:33,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47376344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:33,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:33,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:24:33,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269319592] [2024-06-21 16:24:33,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:33,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:24:33,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:33,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:24:33,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:24:33,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:24:33,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 363 transitions, 2940 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:33,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:33,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:24:33,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:34,526 INFO L124 PetriNetUnfolderBase]: 962/1855 cut-off events. [2024-06-21 16:24:34,527 INFO L125 PetriNetUnfolderBase]: For 643218/643221 co-relation queries the response was YES. [2024-06-21 16:24:34,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13430 conditions, 1855 events. 962/1855 cut-off events. For 643218/643221 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 11670 event pairs, 137 based on Foata normal form. 10/1864 useless extension candidates. Maximal degree in co-relation 13204. Up to 1636 conditions per place. [2024-06-21 16:24:34,557 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 357 selfloop transitions, 27 changer transitions 13/399 dead transitions. [2024-06-21 16:24:34,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 399 transitions, 4422 flow [2024-06-21 16:24:34,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:24:34,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:24:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 161 transitions. [2024-06-21 16:24:34,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.359375 [2024-06-21 16:24:34,558 INFO L175 Difference]: Start difference. First operand has 504 places, 363 transitions, 2940 flow. Second operand 14 states and 161 transitions. [2024-06-21 16:24:34,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 399 transitions, 4422 flow [2024-06-21 16:24:37,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 399 transitions, 4357 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 16:24:37,142 INFO L231 Difference]: Finished difference. Result has 502 places, 356 transitions, 2884 flow [2024-06-21 16:24:37,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2881, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2884, PETRI_PLACES=502, PETRI_TRANSITIONS=356} [2024-06-21 16:24:37,142 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 471 predicate places. [2024-06-21 16:24:37,143 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 356 transitions, 2884 flow [2024-06-21 16:24:37,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:37,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:37,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:37,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-21 16:24:37,143 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:37,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:37,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1357546700, now seen corresponding path program 9 times [2024-06-21 16:24:37,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:37,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464383906] [2024-06-21 16:24:37,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:37,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:38,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:38,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464383906] [2024-06-21 16:24:38,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464383906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:38,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:38,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:24:38,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129871316] [2024-06-21 16:24:38,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:38,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:24:38,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:38,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:24:38,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:24:38,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:24:38,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 356 transitions, 2884 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:38,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:38,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:24:38,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:39,003 INFO L124 PetriNetUnfolderBase]: 921/1776 cut-off events. [2024-06-21 16:24:39,004 INFO L125 PetriNetUnfolderBase]: For 498852/498855 co-relation queries the response was YES. [2024-06-21 16:24:39,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11020 conditions, 1776 events. 921/1776 cut-off events. For 498852/498855 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 11133 event pairs, 128 based on Foata normal form. 12/1787 useless extension candidates. Maximal degree in co-relation 10796. Up to 1636 conditions per place. [2024-06-21 16:24:39,031 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 345 selfloop transitions, 17 changer transitions 22/386 dead transitions. [2024-06-21 16:24:39,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 386 transitions, 3880 flow [2024-06-21 16:24:39,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:24:39,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:24:39,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 146 transitions. [2024-06-21 16:24:39,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35096153846153844 [2024-06-21 16:24:39,032 INFO L175 Difference]: Start difference. First operand has 502 places, 356 transitions, 2884 flow. Second operand 13 states and 146 transitions. [2024-06-21 16:24:39,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 386 transitions, 3880 flow [2024-06-21 16:24:40,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 386 transitions, 3814 flow, removed 7 selfloop flow, removed 15 redundant places. [2024-06-21 16:24:40,853 INFO L231 Difference]: Finished difference. Result has 494 places, 345 transitions, 2754 flow [2024-06-21 16:24:40,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2820, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2754, PETRI_PLACES=494, PETRI_TRANSITIONS=345} [2024-06-21 16:24:40,853 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 463 predicate places. [2024-06-21 16:24:40,853 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 345 transitions, 2754 flow [2024-06-21 16:24:40,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:40,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:40,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:40,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-21 16:24:40,854 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:40,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:40,854 INFO L85 PathProgramCache]: Analyzing trace with hash 89134042, now seen corresponding path program 1 times [2024-06-21 16:24:40,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:40,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807644763] [2024-06-21 16:24:40,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:40,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:41,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:41,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807644763] [2024-06-21 16:24:41,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807644763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:41,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:41,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:24:41,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934999766] [2024-06-21 16:24:41,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:41,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:24:41,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:41,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:24:41,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:24:41,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:24:41,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 345 transitions, 2754 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:41,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:41,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:24:41,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:42,442 INFO L124 PetriNetUnfolderBase]: 885/1701 cut-off events. [2024-06-21 16:24:42,442 INFO L125 PetriNetUnfolderBase]: For 354495/354498 co-relation queries the response was YES. [2024-06-21 16:24:42,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10352 conditions, 1701 events. 885/1701 cut-off events. For 354495/354498 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 10555 event pairs, 102 based on Foata normal form. 4/1704 useless extension candidates. Maximal degree in co-relation 10143. Up to 1270 conditions per place. [2024-06-21 16:24:42,466 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 276 selfloop transitions, 94 changer transitions 0/372 dead transitions. [2024-06-21 16:24:42,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 372 transitions, 3580 flow [2024-06-21 16:24:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:24:42,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:24:42,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2024-06-21 16:24:42,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-21 16:24:42,467 INFO L175 Difference]: Start difference. First operand has 494 places, 345 transitions, 2754 flow. Second operand 12 states and 150 transitions. [2024-06-21 16:24:42,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 372 transitions, 3580 flow [2024-06-21 16:24:44,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 372 transitions, 3526 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-21 16:24:44,375 INFO L231 Difference]: Finished difference. Result has 480 places, 346 transitions, 2906 flow [2024-06-21 16:24:44,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2702, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2906, PETRI_PLACES=480, PETRI_TRANSITIONS=346} [2024-06-21 16:24:44,375 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 449 predicate places. [2024-06-21 16:24:44,375 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 346 transitions, 2906 flow [2024-06-21 16:24:44,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:44,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:44,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:44,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-21 16:24:44,376 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:44,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:44,376 INFO L85 PathProgramCache]: Analyzing trace with hash 653913804, now seen corresponding path program 10 times [2024-06-21 16:24:44,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:44,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265390935] [2024-06-21 16:24:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:44,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:45,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:45,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265390935] [2024-06-21 16:24:45,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265390935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:45,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:45,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:24:45,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693583558] [2024-06-21 16:24:45,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:45,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:24:45,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:45,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:24:45,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:24:45,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:24:45,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 346 transitions, 2906 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:45,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:45,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:24:45,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:46,423 INFO L124 PetriNetUnfolderBase]: 1026/1986 cut-off events. [2024-06-21 16:24:46,423 INFO L125 PetriNetUnfolderBase]: For 466876/466876 co-relation queries the response was YES. [2024-06-21 16:24:46,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11942 conditions, 1986 events. 1026/1986 cut-off events. For 466876/466876 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 12816 event pairs, 205 based on Foata normal form. 10/1995 useless extension candidates. Maximal degree in co-relation 11737. Up to 1555 conditions per place. [2024-06-21 16:24:46,453 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 339 selfloop transitions, 90 changer transitions 11/442 dead transitions. [2024-06-21 16:24:46,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 442 transitions, 4636 flow [2024-06-21 16:24:46,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:24:46,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:24:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 165 transitions. [2024-06-21 16:24:46,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36830357142857145 [2024-06-21 16:24:46,454 INFO L175 Difference]: Start difference. First operand has 480 places, 346 transitions, 2906 flow. Second operand 14 states and 165 transitions. [2024-06-21 16:24:46,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 442 transitions, 4636 flow [2024-06-21 16:24:48,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 442 transitions, 4358 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 16:24:48,256 INFO L231 Difference]: Finished difference. Result has 492 places, 389 transitions, 3494 flow [2024-06-21 16:24:48,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2712, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3494, PETRI_PLACES=492, PETRI_TRANSITIONS=389} [2024-06-21 16:24:48,256 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 461 predicate places. [2024-06-21 16:24:48,257 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 389 transitions, 3494 flow [2024-06-21 16:24:48,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:48,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:48,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:48,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-21 16:24:48,257 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:48,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:48,258 INFO L85 PathProgramCache]: Analyzing trace with hash 653909154, now seen corresponding path program 11 times [2024-06-21 16:24:48,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:48,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857830638] [2024-06-21 16:24:48,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:48,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:49,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:49,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857830638] [2024-06-21 16:24:49,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857830638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:49,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:49,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:24:49,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247634088] [2024-06-21 16:24:49,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:49,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:24:49,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:49,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:24:49,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:24:49,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:24:49,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 389 transitions, 3494 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:49,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:49,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:24:49,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:50,409 INFO L124 PetriNetUnfolderBase]: 1043/2023 cut-off events. [2024-06-21 16:24:50,409 INFO L125 PetriNetUnfolderBase]: For 595591/595594 co-relation queries the response was YES. [2024-06-21 16:24:50,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14271 conditions, 2023 events. 1043/2023 cut-off events. For 595591/595594 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 13036 event pairs, 123 based on Foata normal form. 10/2032 useless extension candidates. Maximal degree in co-relation 14057. Up to 1311 conditions per place. [2024-06-21 16:24:50,435 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 279 selfloop transitions, 134 changer transitions 10/425 dead transitions. [2024-06-21 16:24:50,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 425 transitions, 5004 flow [2024-06-21 16:24:50,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:24:50,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:24:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 169 transitions. [2024-06-21 16:24:50,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 16:24:50,436 INFO L175 Difference]: Start difference. First operand has 492 places, 389 transitions, 3494 flow. Second operand 13 states and 169 transitions. [2024-06-21 16:24:50,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 425 transitions, 5004 flow [2024-06-21 16:24:53,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 425 transitions, 4934 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 16:24:53,290 INFO L231 Difference]: Finished difference. Result has 497 places, 384 transitions, 3651 flow [2024-06-21 16:24:53,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3426, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3651, PETRI_PLACES=497, PETRI_TRANSITIONS=384} [2024-06-21 16:24:53,290 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 466 predicate places. [2024-06-21 16:24:53,291 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 384 transitions, 3651 flow [2024-06-21 16:24:53,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:53,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:53,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:53,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-21 16:24:53,291 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:53,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:53,291 INFO L85 PathProgramCache]: Analyzing trace with hash 483091404, now seen corresponding path program 12 times [2024-06-21 16:24:53,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:53,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053170961] [2024-06-21 16:24:53,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:53,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:54,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:54,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053170961] [2024-06-21 16:24:54,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053170961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:54,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:54,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:24:54,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365370706] [2024-06-21 16:24:54,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:54,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:24:54,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:54,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:24:54,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:24:54,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:24:54,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 384 transitions, 3651 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:54,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:54,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:24:54,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:55,074 INFO L124 PetriNetUnfolderBase]: 1062/2064 cut-off events. [2024-06-21 16:24:55,074 INFO L125 PetriNetUnfolderBase]: For 755005/755008 co-relation queries the response was YES. [2024-06-21 16:24:55,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16733 conditions, 2064 events. 1062/2064 cut-off events. For 755005/755008 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 13307 event pairs, 140 based on Foata normal form. 10/2073 useless extension candidates. Maximal degree in co-relation 16520. Up to 1236 conditions per place. [2024-06-21 16:24:55,105 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 272 selfloop transitions, 137 changer transitions 10/421 dead transitions. [2024-06-21 16:24:55,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 421 transitions, 5155 flow [2024-06-21 16:24:55,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:24:55,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:24:55,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 171 transitions. [2024-06-21 16:24:55,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110576923076923 [2024-06-21 16:24:55,106 INFO L175 Difference]: Start difference. First operand has 497 places, 384 transitions, 3651 flow. Second operand 13 states and 171 transitions. [2024-06-21 16:24:55,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 421 transitions, 5155 flow [2024-06-21 16:24:58,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 421 transitions, 4877 flow, removed 6 selfloop flow, removed 14 redundant places. [2024-06-21 16:24:58,344 INFO L231 Difference]: Finished difference. Result has 492 places, 381 transitions, 3640 flow [2024-06-21 16:24:58,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3377, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3640, PETRI_PLACES=492, PETRI_TRANSITIONS=381} [2024-06-21 16:24:58,345 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 461 predicate places. [2024-06-21 16:24:58,345 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 381 transitions, 3640 flow [2024-06-21 16:24:58,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:58,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:58,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:58,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-21 16:24:58,345 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:58,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:58,346 INFO L85 PathProgramCache]: Analyzing trace with hash 483206724, now seen corresponding path program 13 times [2024-06-21 16:24:58,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:58,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089749723] [2024-06-21 16:24:58,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:58,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:59,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:59,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089749723] [2024-06-21 16:24:59,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089749723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:59,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:59,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:24:59,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046384113] [2024-06-21 16:24:59,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:59,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:24:59,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:59,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:24:59,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:24:59,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:24:59,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 381 transitions, 3640 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:59,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:59,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:24:59,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:00,239 INFO L124 PetriNetUnfolderBase]: 1052/2046 cut-off events. [2024-06-21 16:25:00,239 INFO L125 PetriNetUnfolderBase]: For 746267/746270 co-relation queries the response was YES. [2024-06-21 16:25:00,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16656 conditions, 2046 events. 1052/2046 cut-off events. For 746267/746270 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 13193 event pairs, 138 based on Foata normal form. 10/2055 useless extension candidates. Maximal degree in co-relation 16446. Up to 1301 conditions per place. [2024-06-21 16:25:00,271 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 270 selfloop transitions, 138 changer transitions 9/419 dead transitions. [2024-06-21 16:25:00,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 419 transitions, 5142 flow [2024-06-21 16:25:00,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:25:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:25:00,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 180 transitions. [2024-06-21 16:25:00,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 16:25:00,272 INFO L175 Difference]: Start difference. First operand has 492 places, 381 transitions, 3640 flow. Second operand 14 states and 180 transitions. [2024-06-21 16:25:00,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 419 transitions, 5142 flow [2024-06-21 16:25:03,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 419 transitions, 4864 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 16:25:03,965 INFO L231 Difference]: Finished difference. Result has 490 places, 377 transitions, 3620 flow [2024-06-21 16:25:03,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3620, PETRI_PLACES=490, PETRI_TRANSITIONS=377} [2024-06-21 16:25:03,966 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 459 predicate places. [2024-06-21 16:25:03,966 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 377 transitions, 3620 flow [2024-06-21 16:25:03,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:03,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:03,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:03,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-21 16:25:03,966 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:25:03,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:03,967 INFO L85 PathProgramCache]: Analyzing trace with hash 487680024, now seen corresponding path program 14 times [2024-06-21 16:25:03,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:03,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939375659] [2024-06-21 16:25:03,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:03,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:04,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:04,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939375659] [2024-06-21 16:25:04,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939375659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:04,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:04,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:25:04,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618604232] [2024-06-21 16:25:04,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:04,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:25:04,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:04,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:25:04,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:25:05,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:25:05,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 377 transitions, 3620 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:05,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:05,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:25:05,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:05,699 INFO L124 PetriNetUnfolderBase]: 1051/2049 cut-off events. [2024-06-21 16:25:05,699 INFO L125 PetriNetUnfolderBase]: For 762895/762895 co-relation queries the response was YES. [2024-06-21 16:25:05,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16740 conditions, 2049 events. 1051/2049 cut-off events. For 762895/762895 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 13204 event pairs, 248 based on Foata normal form. 10/2058 useless extension candidates. Maximal degree in co-relation 16532. Up to 1573 conditions per place. [2024-06-21 16:25:05,730 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 312 selfloop transitions, 101 changer transitions 15/430 dead transitions. [2024-06-21 16:25:05,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 430 transitions, 4858 flow [2024-06-21 16:25:05,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:25:05,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:25:05,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 159 transitions. [2024-06-21 16:25:05,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38221153846153844 [2024-06-21 16:25:05,732 INFO L175 Difference]: Start difference. First operand has 490 places, 377 transitions, 3620 flow. Second operand 13 states and 159 transitions. [2024-06-21 16:25:05,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 430 transitions, 4858 flow [2024-06-21 16:25:08,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 430 transitions, 4578 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-21 16:25:08,985 INFO L231 Difference]: Finished difference. Result has 490 places, 376 transitions, 3544 flow [2024-06-21 16:25:08,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3344, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3544, PETRI_PLACES=490, PETRI_TRANSITIONS=376} [2024-06-21 16:25:08,985 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 459 predicate places. [2024-06-21 16:25:08,986 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 376 transitions, 3544 flow [2024-06-21 16:25:08,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:08,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:08,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:08,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-21 16:25:08,986 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:25:08,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:08,987 INFO L85 PathProgramCache]: Analyzing trace with hash 483211374, now seen corresponding path program 15 times [2024-06-21 16:25:08,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:08,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215263468] [2024-06-21 16:25:08,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:08,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:09,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:09,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215263468] [2024-06-21 16:25:09,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215263468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:09,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:09,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:25:09,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827986688] [2024-06-21 16:25:09,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:09,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:25:09,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:09,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:25:09,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:25:10,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:25:10,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 376 transitions, 3544 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:10,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:10,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:25:10,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:10,878 INFO L124 PetriNetUnfolderBase]: 1012/1970 cut-off events. [2024-06-21 16:25:10,878 INFO L125 PetriNetUnfolderBase]: For 603040/603043 co-relation queries the response was YES. [2024-06-21 16:25:10,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14252 conditions, 1970 events. 1012/1970 cut-off events. For 603040/603043 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 12630 event pairs, 129 based on Foata normal form. 12/1981 useless extension candidates. Maximal degree in co-relation 14042. Up to 1301 conditions per place. [2024-06-21 16:25:10,908 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 258 selfloop transitions, 126 changer transitions 23/409 dead transitions. [2024-06-21 16:25:10,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 409 transitions, 4590 flow [2024-06-21 16:25:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:25:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:25:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 174 transitions. [2024-06-21 16:25:10,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38839285714285715 [2024-06-21 16:25:10,909 INFO L175 Difference]: Start difference. First operand has 490 places, 376 transitions, 3544 flow. Second operand 14 states and 174 transitions. [2024-06-21 16:25:10,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 409 transitions, 4590 flow [2024-06-21 16:25:13,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 409 transitions, 4383 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 16:25:13,591 INFO L231 Difference]: Finished difference. Result has 491 places, 363 transitions, 3497 flow [2024-06-21 16:25:13,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3337, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3497, PETRI_PLACES=491, PETRI_TRANSITIONS=363} [2024-06-21 16:25:13,592 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 460 predicate places. [2024-06-21 16:25:13,592 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 363 transitions, 3497 flow [2024-06-21 16:25:13,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:13,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:13,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:13,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-21 16:25:13,592 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:25:13,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:13,593 INFO L85 PathProgramCache]: Analyzing trace with hash 926006670, now seen corresponding path program 2 times [2024-06-21 16:25:13,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:13,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727679634] [2024-06-21 16:25:13,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:13,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:14,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:14,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727679634] [2024-06-21 16:25:14,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727679634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:14,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:14,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:25:14,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560703331] [2024-06-21 16:25:14,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:14,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:25:14,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:14,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:25:14,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:25:14,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:25:14,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 363 transitions, 3497 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:14,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:14,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:25:14,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:15,207 INFO L124 PetriNetUnfolderBase]: 976/1898 cut-off events. [2024-06-21 16:25:15,207 INFO L125 PetriNetUnfolderBase]: For 482655/482658 co-relation queries the response was YES. [2024-06-21 16:25:15,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13798 conditions, 1898 events. 976/1898 cut-off events. For 482655/482658 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 12057 event pairs, 141 based on Foata normal form. 4/1901 useless extension candidates. Maximal degree in co-relation 13590. Up to 1302 conditions per place. [2024-06-21 16:25:15,235 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 279 selfloop transitions, 107 changer transitions 0/388 dead transitions. [2024-06-21 16:25:15,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 388 transitions, 4349 flow [2024-06-21 16:25:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:25:15,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:25:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2024-06-21 16:25:15,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 16:25:15,236 INFO L175 Difference]: Start difference. First operand has 491 places, 363 transitions, 3497 flow. Second operand 12 states and 152 transitions. [2024-06-21 16:25:15,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 388 transitions, 4349 flow [2024-06-21 16:25:18,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 388 transitions, 4065 flow, removed 14 selfloop flow, removed 18 redundant places. [2024-06-21 16:25:18,004 INFO L231 Difference]: Finished difference. Result has 472 places, 364 transitions, 3445 flow [2024-06-21 16:25:18,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3213, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3445, PETRI_PLACES=472, PETRI_TRANSITIONS=364} [2024-06-21 16:25:18,004 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 441 predicate places. [2024-06-21 16:25:18,004 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 364 transitions, 3445 flow [2024-06-21 16:25:18,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:18,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:18,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:18,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-21 16:25:18,005 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:25:18,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:18,005 INFO L85 PathProgramCache]: Analyzing trace with hash 919326976, now seen corresponding path program 16 times [2024-06-21 16:25:18,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:18,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255027142] [2024-06-21 16:25:18,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:18,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:19,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:19,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255027142] [2024-06-21 16:25:19,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255027142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:19,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:19,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:25:19,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890600781] [2024-06-21 16:25:19,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:19,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:25:19,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:19,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:25:19,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:25:19,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:25:19,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 364 transitions, 3445 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:19,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:19,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:25:19,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:19,958 INFO L124 PetriNetUnfolderBase]: 1017/1985 cut-off events. [2024-06-21 16:25:19,959 INFO L125 PetriNetUnfolderBase]: For 673681/673684 co-relation queries the response was YES. [2024-06-21 16:25:19,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15835 conditions, 1985 events. 1017/1985 cut-off events. For 673681/673684 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 12721 event pairs, 156 based on Foata normal form. 10/1994 useless extension candidates. Maximal degree in co-relation 15634. Up to 1291 conditions per place. [2024-06-21 16:25:19,992 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 282 selfloop transitions, 107 changer transitions 7/398 dead transitions. [2024-06-21 16:25:19,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 398 transitions, 4855 flow [2024-06-21 16:25:20,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:25:20,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:25:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 171 transitions. [2024-06-21 16:25:20,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110576923076923 [2024-06-21 16:25:20,016 INFO L175 Difference]: Start difference. First operand has 472 places, 364 transitions, 3445 flow. Second operand 13 states and 171 transitions. [2024-06-21 16:25:20,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 398 transitions, 4855 flow [2024-06-21 16:25:23,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 398 transitions, 4633 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 16:25:23,317 INFO L231 Difference]: Finished difference. Result has 475 places, 362 transitions, 3429 flow [2024-06-21 16:25:23,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3223, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3429, PETRI_PLACES=475, PETRI_TRANSITIONS=362} [2024-06-21 16:25:23,317 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 444 predicate places. [2024-06-21 16:25:23,317 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 362 transitions, 3429 flow [2024-06-21 16:25:23,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:23,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:23,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:23,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-21 16:25:23,318 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:25:23,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:23,318 INFO L85 PathProgramCache]: Analyzing trace with hash 919331626, now seen corresponding path program 17 times [2024-06-21 16:25:23,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:23,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519536029] [2024-06-21 16:25:23,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:23,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:24,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:24,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519536029] [2024-06-21 16:25:24,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519536029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:24,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:24,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:25:24,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754248136] [2024-06-21 16:25:24,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:24,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:25:24,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:24,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:25:24,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:25:24,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:25:24,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 362 transitions, 3429 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:24,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:24,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:25:24,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:25,417 INFO L124 PetriNetUnfolderBase]: 1022/1998 cut-off events. [2024-06-21 16:25:25,417 INFO L125 PetriNetUnfolderBase]: For 712481/712481 co-relation queries the response was YES. [2024-06-21 16:25:25,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16024 conditions, 1998 events. 1022/1998 cut-off events. For 712481/712481 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 12765 event pairs, 274 based on Foata normal form. 10/2007 useless extension candidates. Maximal degree in co-relation 15822. Up to 1576 conditions per place. [2024-06-21 16:25:25,451 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 328 selfloop transitions, 69 changer transitions 15/414 dead transitions. [2024-06-21 16:25:25,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 414 transitions, 4620 flow [2024-06-21 16:25:25,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:25:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:25:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 166 transitions. [2024-06-21 16:25:25,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3705357142857143 [2024-06-21 16:25:25,452 INFO L175 Difference]: Start difference. First operand has 475 places, 362 transitions, 3429 flow. Second operand 14 states and 166 transitions. [2024-06-21 16:25:25,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 414 transitions, 4620 flow [2024-06-21 16:25:28,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 414 transitions, 4396 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 16:25:28,528 INFO L231 Difference]: Finished difference. Result has 479 places, 363 transitions, 3376 flow [2024-06-21 16:25:28,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3213, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3376, PETRI_PLACES=479, PETRI_TRANSITIONS=363} [2024-06-21 16:25:28,529 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 448 predicate places. [2024-06-21 16:25:28,529 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 363 transitions, 3376 flow [2024-06-21 16:25:28,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:28,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:28,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:28,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-21 16:25:28,530 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:25:28,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:28,530 INFO L85 PathProgramCache]: Analyzing trace with hash 753097846, now seen corresponding path program 18 times [2024-06-21 16:25:28,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:28,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269103487] [2024-06-21 16:25:28,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:28,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:29,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:29,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269103487] [2024-06-21 16:25:29,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269103487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:29,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:29,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:25:29,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624817496] [2024-06-21 16:25:29,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:29,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:25:29,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:29,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:25:29,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:25:29,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:25:29,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 363 transitions, 3376 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:29,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:29,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:25:29,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:30,403 INFO L124 PetriNetUnfolderBase]: 1021/1995 cut-off events. [2024-06-21 16:25:30,403 INFO L125 PetriNetUnfolderBase]: For 703732/703732 co-relation queries the response was YES. [2024-06-21 16:25:30,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15918 conditions, 1995 events. 1021/1995 cut-off events. For 703732/703732 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 12766 event pairs, 271 based on Foata normal form. 10/2004 useless extension candidates. Maximal degree in co-relation 15713. Up to 1528 conditions per place. [2024-06-21 16:25:30,489 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 314 selfloop transitions, 85 changer transitions 11/412 dead transitions. [2024-06-21 16:25:30,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 412 transitions, 4550 flow [2024-06-21 16:25:30,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:25:30,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:25:30,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 159 transitions. [2024-06-21 16:25:30,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38221153846153844 [2024-06-21 16:25:30,491 INFO L175 Difference]: Start difference. First operand has 479 places, 363 transitions, 3376 flow. Second operand 13 states and 159 transitions. [2024-06-21 16:25:30,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 412 transitions, 4550 flow [2024-06-21 16:25:33,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 412 transitions, 4467 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 16:25:33,327 INFO L231 Difference]: Finished difference. Result has 483 places, 366 transitions, 3512 flow [2024-06-21 16:25:33,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3293, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3512, PETRI_PLACES=483, PETRI_TRANSITIONS=366} [2024-06-21 16:25:33,328 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 452 predicate places. [2024-06-21 16:25:33,328 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 366 transitions, 3512 flow [2024-06-21 16:25:33,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:33,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:33,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:33,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-21 16:25:33,329 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:25:33,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:33,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1537599336, now seen corresponding path program 19 times [2024-06-21 16:25:33,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:33,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682500569] [2024-06-21 16:25:33,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:33,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:34,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:34,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682500569] [2024-06-21 16:25:34,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682500569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:34,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:34,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:25:34,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845565294] [2024-06-21 16:25:34,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:34,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:25:34,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:34,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:25:34,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:25:34,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:25:34,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 366 transitions, 3512 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:34,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:34,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:25:34,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:35,437 INFO L124 PetriNetUnfolderBase]: 1038/2032 cut-off events. [2024-06-21 16:25:35,437 INFO L125 PetriNetUnfolderBase]: For 814498/814501 co-relation queries the response was YES. [2024-06-21 16:25:35,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18010 conditions, 2032 events. 1038/2032 cut-off events. For 814498/814501 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 13025 event pairs, 175 based on Foata normal form. 10/2041 useless extension candidates. Maximal degree in co-relation 17804. Up to 1338 conditions per place. [2024-06-21 16:25:35,468 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 279 selfloop transitions, 108 changer transitions 10/399 dead transitions. [2024-06-21 16:25:35,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 399 transitions, 4920 flow [2024-06-21 16:25:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:25:35,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:25:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 167 transitions. [2024-06-21 16:25:35,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014423076923077 [2024-06-21 16:25:35,469 INFO L175 Difference]: Start difference. First operand has 483 places, 366 transitions, 3512 flow. Second operand 13 states and 167 transitions. [2024-06-21 16:25:35,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 399 transitions, 4920 flow [2024-06-21 16:25:39,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 399 transitions, 4759 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 16:25:39,250 INFO L231 Difference]: Finished difference. Result has 486 places, 361 transitions, 3511 flow [2024-06-21 16:25:39,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3353, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3511, PETRI_PLACES=486, PETRI_TRANSITIONS=361} [2024-06-21 16:25:39,250 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 455 predicate places. [2024-06-21 16:25:39,250 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 361 transitions, 3511 flow [2024-06-21 16:25:39,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:39,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:39,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:39,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-21 16:25:39,251 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:25:39,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:39,251 INFO L85 PathProgramCache]: Analyzing trace with hash 748629196, now seen corresponding path program 20 times [2024-06-21 16:25:39,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:39,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530575828] [2024-06-21 16:25:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:39,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:40,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:40,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530575828] [2024-06-21 16:25:40,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530575828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:40,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:40,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:25:40,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122299832] [2024-06-21 16:25:40,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:40,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:25:40,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:40,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:25:40,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:25:40,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:25:40,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 361 transitions, 3511 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:40,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:40,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:25:40,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:41,257 INFO L124 PetriNetUnfolderBase]: 1019/1999 cut-off events. [2024-06-21 16:25:41,257 INFO L125 PetriNetUnfolderBase]: For 844908/844911 co-relation queries the response was YES. [2024-06-21 16:25:41,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16250 conditions, 1999 events. 1019/1999 cut-off events. For 844908/844911 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 12815 event pairs, 168 based on Foata normal form. 22/2020 useless extension candidates. Maximal degree in co-relation 16045. Up to 1298 conditions per place. [2024-06-21 16:25:41,290 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 260 selfloop transitions, 112 changer transitions 17/391 dead transitions. [2024-06-21 16:25:41,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 391 transitions, 4497 flow [2024-06-21 16:25:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:25:41,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:25:41,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 174 transitions. [2024-06-21 16:25:41,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38839285714285715 [2024-06-21 16:25:41,291 INFO L175 Difference]: Start difference. First operand has 486 places, 361 transitions, 3511 flow. Second operand 14 states and 174 transitions. [2024-06-21 16:25:41,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 391 transitions, 4497 flow [2024-06-21 16:25:44,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 391 transitions, 4275 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 16:25:44,708 INFO L231 Difference]: Finished difference. Result has 483 places, 353 transitions, 3451 flow [2024-06-21 16:25:44,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3289, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3451, PETRI_PLACES=483, PETRI_TRANSITIONS=353} [2024-06-21 16:25:44,708 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 452 predicate places. [2024-06-21 16:25:44,709 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 353 transitions, 3451 flow [2024-06-21 16:25:44,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:44,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:44,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:44,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-21 16:25:44,709 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:25:44,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:44,710 INFO L85 PathProgramCache]: Analyzing trace with hash 748624546, now seen corresponding path program 21 times [2024-06-21 16:25:44,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:44,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364273221] [2024-06-21 16:25:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:44,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:45,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:45,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364273221] [2024-06-21 16:25:45,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364273221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:45,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:45,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:25:45,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312089432] [2024-06-21 16:25:45,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:45,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:25:45,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:45,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:25:45,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:25:45,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:25:45,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 353 transitions, 3451 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:45,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:45,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:25:45,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:46,545 INFO L124 PetriNetUnfolderBase]: 981/1925 cut-off events. [2024-06-21 16:25:46,546 INFO L125 PetriNetUnfolderBase]: For 674046/674049 co-relation queries the response was YES. [2024-06-21 16:25:46,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15650 conditions, 1925 events. 981/1925 cut-off events. For 674046/674049 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 12275 event pairs, 160 based on Foata normal form. 10/1934 useless extension candidates. Maximal degree in co-relation 15447. Up to 1288 conditions per place. [2024-06-21 16:25:46,575 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 258 selfloop transitions, 110 changer transitions 11/381 dead transitions. [2024-06-21 16:25:46,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 381 transitions, 4347 flow [2024-06-21 16:25:46,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:25:46,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:25:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 162 transitions. [2024-06-21 16:25:46,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894230769230769 [2024-06-21 16:25:46,577 INFO L175 Difference]: Start difference. First operand has 483 places, 353 transitions, 3451 flow. Second operand 13 states and 162 transitions. [2024-06-21 16:25:46,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 381 transitions, 4347 flow [2024-06-21 16:25:49,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 381 transitions, 4107 flow, removed 8 selfloop flow, removed 14 redundant places. [2024-06-21 16:25:49,961 INFO L231 Difference]: Finished difference. Result has 474 places, 350 transitions, 3421 flow [2024-06-21 16:25:49,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3213, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3421, PETRI_PLACES=474, PETRI_TRANSITIONS=350} [2024-06-21 16:25:49,962 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 443 predicate places. [2024-06-21 16:25:49,962 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 350 transitions, 3421 flow [2024-06-21 16:25:49,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:49,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:49,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:49,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2024-06-21 16:25:49,963 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:25:49,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:49,963 INFO L85 PathProgramCache]: Analyzing trace with hash 748509226, now seen corresponding path program 22 times [2024-06-21 16:25:49,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:49,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525302097] [2024-06-21 16:25:49,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:49,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:50,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:50,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525302097] [2024-06-21 16:25:50,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525302097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:50,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:50,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:25:50,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030724099] [2024-06-21 16:25:50,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:50,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:25:50,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:50,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:25:50,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:25:51,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:25:51,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 350 transitions, 3421 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:51,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:51,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:25:51,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:51,832 INFO L124 PetriNetUnfolderBase]: 1003/1971 cut-off events. [2024-06-21 16:25:51,832 INFO L125 PetriNetUnfolderBase]: For 788029/788032 co-relation queries the response was YES. [2024-06-21 16:25:51,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17591 conditions, 1971 events. 1003/1971 cut-off events. For 788029/788032 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 12566 event pairs, 167 based on Foata normal form. 10/1980 useless extension candidates. Maximal degree in co-relation 17391. Up to 1189 conditions per place. [2024-06-21 16:25:51,862 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 263 selfloop transitions, 105 changer transitions 14/384 dead transitions. [2024-06-21 16:25:51,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 384 transitions, 4789 flow [2024-06-21 16:25:51,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:25:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:25:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 168 transitions. [2024-06-21 16:25:51,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-06-21 16:25:51,863 INFO L175 Difference]: Start difference. First operand has 474 places, 350 transitions, 3421 flow. Second operand 13 states and 168 transitions. [2024-06-21 16:25:51,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 384 transitions, 4789 flow [2024-06-21 16:25:55,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 384 transitions, 4539 flow, removed 15 selfloop flow, removed 13 redundant places. [2024-06-21 16:25:55,475 INFO L231 Difference]: Finished difference. Result has 469 places, 343 transitions, 3341 flow [2024-06-21 16:25:55,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3187, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3341, PETRI_PLACES=469, PETRI_TRANSITIONS=343} [2024-06-21 16:25:55,476 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 438 predicate places. [2024-06-21 16:25:55,476 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 343 transitions, 3341 flow [2024-06-21 16:25:55,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:55,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:55,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:55,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2024-06-21 16:25:55,477 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:25:55,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:55,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1658481256, now seen corresponding path program 23 times [2024-06-21 16:25:55,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:55,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199214700] [2024-06-21 16:25:55,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:55,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:56,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:56,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199214700] [2024-06-21 16:25:56,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199214700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:56,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:56,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:25:56,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970321420] [2024-06-21 16:25:56,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:56,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:25:56,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:56,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:25:56,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:25:56,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:25:56,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 343 transitions, 3341 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:56,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:56,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:25:56,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:57,591 INFO L124 PetriNetUnfolderBase]: 1001/1967 cut-off events. [2024-06-21 16:25:57,592 INFO L125 PetriNetUnfolderBase]: For 788056/788056 co-relation queries the response was YES. [2024-06-21 16:25:57,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17426 conditions, 1967 events. 1001/1967 cut-off events. For 788056/788056 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 12515 event pairs, 294 based on Foata normal form. 10/1976 useless extension candidates. Maximal degree in co-relation 17229. Up to 1554 conditions per place. [2024-06-21 16:25:57,620 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 308 selfloop transitions, 69 changer transitions 11/390 dead transitions. [2024-06-21 16:25:57,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 390 transitions, 4441 flow [2024-06-21 16:25:57,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:25:57,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:25:57,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 161 transitions. [2024-06-21 16:25:57,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.359375 [2024-06-21 16:25:57,621 INFO L175 Difference]: Start difference. First operand has 469 places, 343 transitions, 3341 flow. Second operand 14 states and 161 transitions. [2024-06-21 16:25:57,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 390 transitions, 4441 flow [2024-06-21 16:26:00,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 390 transitions, 4219 flow, removed 7 selfloop flow, removed 14 redundant places. [2024-06-21 16:26:00,152 INFO L231 Difference]: Finished difference. Result has 466 places, 345 transitions, 3296 flow [2024-06-21 16:26:00,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3124, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3296, PETRI_PLACES=466, PETRI_TRANSITIONS=345} [2024-06-21 16:26:00,152 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 435 predicate places. [2024-06-21 16:26:00,153 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 345 transitions, 3296 flow [2024-06-21 16:26:00,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:00,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:00,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:00,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2024-06-21 16:26:00,153 INFO L420 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:26:00,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:00,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1658485906, now seen corresponding path program 24 times [2024-06-21 16:26:00,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:00,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389291713] [2024-06-21 16:26:00,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:00,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:01,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:01,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389291713] [2024-06-21 16:26:01,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389291713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:01,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:01,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:26:01,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037077241] [2024-06-21 16:26:01,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:01,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:26:01,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:01,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:26:01,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:26:01,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:26:01,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 345 transitions, 3296 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:01,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:01,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:26:01,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:02,293 INFO L124 PetriNetUnfolderBase]: 989/1945 cut-off events. [2024-06-21 16:26:02,293 INFO L125 PetriNetUnfolderBase]: For 722903/722906 co-relation queries the response was YES. [2024-06-21 16:26:02,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16966 conditions, 1945 events. 989/1945 cut-off events. For 722903/722906 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 12311 event pairs, 173 based on Foata normal form. 10/1954 useless extension candidates. Maximal degree in co-relation 16770. Up to 1263 conditions per place. [2024-06-21 16:26:02,323 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 263 selfloop transitions, 103 changer transitions 10/378 dead transitions. [2024-06-21 16:26:02,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 378 transitions, 4626 flow [2024-06-21 16:26:02,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:26:02,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:26:02,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 165 transitions. [2024-06-21 16:26:02,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39663461538461536 [2024-06-21 16:26:02,324 INFO L175 Difference]: Start difference. First operand has 466 places, 345 transitions, 3296 flow. Second operand 13 states and 165 transitions. [2024-06-21 16:26:02,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 378 transitions, 4626 flow [2024-06-21 16:26:06,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 378 transitions, 4493 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 16:26:06,537 INFO L231 Difference]: Finished difference. Result has 467 places, 340 transitions, 3322 flow [2024-06-21 16:26:06,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3165, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3322, PETRI_PLACES=467, PETRI_TRANSITIONS=340} [2024-06-21 16:26:06,537 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 436 predicate places. [2024-06-21 16:26:06,537 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 340 transitions, 3322 flow [2024-06-21 16:26:06,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:06,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:06,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:06,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2024-06-21 16:26:06,538 INFO L420 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:26:06,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:06,539 INFO L85 PathProgramCache]: Analyzing trace with hash -637611462, now seen corresponding path program 3 times [2024-06-21 16:26:06,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:06,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844100926] [2024-06-21 16:26:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:06,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:07,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:07,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844100926] [2024-06-21 16:26:07,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844100926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:07,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:07,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:26:07,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579602971] [2024-06-21 16:26:07,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:07,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:26:07,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:07,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:26:07,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:26:07,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:26:07,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 340 transitions, 3322 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:07,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:07,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:26:07,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:08,433 INFO L124 PetriNetUnfolderBase]: 971/1907 cut-off events. [2024-06-21 16:26:08,434 INFO L125 PetriNetUnfolderBase]: For 650576/650579 co-relation queries the response was YES. [2024-06-21 16:26:08,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16832 conditions, 1907 events. 971/1907 cut-off events. For 650576/650579 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 12048 event pairs, 179 based on Foata normal form. 4/1910 useless extension candidates. Maximal degree in co-relation 16637. Up to 1329 conditions per place. [2024-06-21 16:26:08,459 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 258 selfloop transitions, 104 changer transitions 0/364 dead transitions. [2024-06-21 16:26:08,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 364 transitions, 4124 flow [2024-06-21 16:26:08,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:26:08,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:26:08,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-06-21 16:26:08,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3776041666666667 [2024-06-21 16:26:08,460 INFO L175 Difference]: Start difference. First operand has 467 places, 340 transitions, 3322 flow. Second operand 12 states and 145 transitions. [2024-06-21 16:26:08,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 364 transitions, 4124 flow [2024-06-21 16:26:12,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 364 transitions, 3912 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 16:26:12,145 INFO L231 Difference]: Finished difference. Result has 462 places, 341 transitions, 3338 flow [2024-06-21 16:26:12,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3110, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3338, PETRI_PLACES=462, PETRI_TRANSITIONS=341} [2024-06-21 16:26:12,145 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 431 predicate places. [2024-06-21 16:26:12,146 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 341 transitions, 3338 flow [2024-06-21 16:26:12,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:12,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:12,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:12,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2024-06-21 16:26:12,146 INFO L420 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:26:12,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:12,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1651806212, now seen corresponding path program 4 times [2024-06-21 16:26:12,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:12,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383498677] [2024-06-21 16:26:12,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:12,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:13,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:13,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383498677] [2024-06-21 16:26:13,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383498677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:13,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:13,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:26:13,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125044153] [2024-06-21 16:26:13,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:13,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:26:13,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:13,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:26:13,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:26:13,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:26:13,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 341 transitions, 3338 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:13,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:13,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:26:13,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:13,773 INFO L124 PetriNetUnfolderBase]: 975/1915 cut-off events. [2024-06-21 16:26:13,773 INFO L125 PetriNetUnfolderBase]: For 642587/642590 co-relation queries the response was YES. [2024-06-21 16:26:13,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16848 conditions, 1915 events. 975/1915 cut-off events. For 642587/642590 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 12112 event pairs, 181 based on Foata normal form. 4/1918 useless extension candidates. Maximal degree in co-relation 16655. Up to 1337 conditions per place. [2024-06-21 16:26:13,802 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 261 selfloop transitions, 103 changer transitions 0/366 dead transitions. [2024-06-21 16:26:13,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 366 transitions, 4150 flow [2024-06-21 16:26:13,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:26:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:26:13,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-06-21 16:26:13,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880208333333333 [2024-06-21 16:26:13,803 INFO L175 Difference]: Start difference. First operand has 462 places, 341 transitions, 3338 flow. Second operand 12 states and 149 transitions. [2024-06-21 16:26:13,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 366 transitions, 4150 flow [2024-06-21 16:26:17,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 366 transitions, 3932 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 16:26:17,068 INFO L231 Difference]: Finished difference. Result has 464 places, 342 transitions, 3348 flow [2024-06-21 16:26:17,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3120, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3348, PETRI_PLACES=464, PETRI_TRANSITIONS=342} [2024-06-21 16:26:17,068 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 433 predicate places. [2024-06-21 16:26:17,068 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 342 transitions, 3348 flow [2024-06-21 16:26:17,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:17,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:17,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:17,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2024-06-21 16:26:17,069 INFO L420 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:26:17,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:17,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1421829302, now seen corresponding path program 5 times [2024-06-21 16:26:17,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:17,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145069782] [2024-06-21 16:26:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:17,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:18,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:18,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145069782] [2024-06-21 16:26:18,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145069782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:18,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:18,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:26:18,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405239652] [2024-06-21 16:26:18,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:18,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:26:18,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:18,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:26:18,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:26:18,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:26:18,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 342 transitions, 3348 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:18,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:18,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:26:18,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:18,879 INFO L124 PetriNetUnfolderBase]: 979/1923 cut-off events. [2024-06-21 16:26:18,880 INFO L125 PetriNetUnfolderBase]: For 651030/651033 co-relation queries the response was YES. [2024-06-21 16:26:18,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16929 conditions, 1923 events. 979/1923 cut-off events. For 651030/651033 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 12186 event pairs, 183 based on Foata normal form. 4/1926 useless extension candidates. Maximal degree in co-relation 16735. Up to 1273 conditions per place. [2024-06-21 16:26:18,907 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 257 selfloop transitions, 107 changer transitions 0/366 dead transitions. [2024-06-21 16:26:18,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 366 transitions, 4156 flow [2024-06-21 16:26:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:26:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:26:18,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-06-21 16:26:18,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3828125 [2024-06-21 16:26:18,908 INFO L175 Difference]: Start difference. First operand has 464 places, 342 transitions, 3348 flow. Second operand 12 states and 147 transitions. [2024-06-21 16:26:18,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 366 transitions, 4156 flow [2024-06-21 16:26:22,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 366 transitions, 3938 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 16:26:22,302 INFO L231 Difference]: Finished difference. Result has 466 places, 343 transitions, 3368 flow [2024-06-21 16:26:22,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3130, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3368, PETRI_PLACES=466, PETRI_TRANSITIONS=343} [2024-06-21 16:26:22,303 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 435 predicate places. [2024-06-21 16:26:22,303 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 343 transitions, 3368 flow [2024-06-21 16:26:22,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:22,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:22,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:22,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2024-06-21 16:26:22,304 INFO L420 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:26:22,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:22,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1381978974, now seen corresponding path program 25 times [2024-06-21 16:26:22,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:22,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101062437] [2024-06-21 16:26:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:22,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:23,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:23,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101062437] [2024-06-21 16:26:23,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101062437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:23,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:23,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:26:23,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222922558] [2024-06-21 16:26:23,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:23,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:26:23,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:23,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:26:23,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:26:23,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:26:23,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 343 transitions, 3368 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:23,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:23,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:26:23,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:24,205 INFO L124 PetriNetUnfolderBase]: 1020/2012 cut-off events. [2024-06-21 16:26:24,205 INFO L125 PetriNetUnfolderBase]: For 858875/858875 co-relation queries the response was YES. [2024-06-21 16:26:24,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19230 conditions, 2012 events. 1020/2012 cut-off events. For 858875/858875 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 12850 event pairs, 207 based on Foata normal form. 8/2019 useless extension candidates. Maximal degree in co-relation 19035. Up to 1334 conditions per place. [2024-06-21 16:26:24,235 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 263 selfloop transitions, 102 changer transitions 7/374 dead transitions. [2024-06-21 16:26:24,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 374 transitions, 4686 flow [2024-06-21 16:26:24,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:26:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:26:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 169 transitions. [2024-06-21 16:26:24,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 16:26:24,236 INFO L175 Difference]: Start difference. First operand has 466 places, 343 transitions, 3368 flow. Second operand 13 states and 169 transitions. [2024-06-21 16:26:24,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 374 transitions, 4686 flow [2024-06-21 16:26:27,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 374 transitions, 4458 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 16:26:27,786 INFO L231 Difference]: Finished difference. Result has 469 places, 341 transitions, 3336 flow [2024-06-21 16:26:27,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3140, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3336, PETRI_PLACES=469, PETRI_TRANSITIONS=341} [2024-06-21 16:26:27,787 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 438 predicate places. [2024-06-21 16:26:27,787 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 341 transitions, 3336 flow [2024-06-21 16:26:27,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:27,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:27,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:27,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2024-06-21 16:26:27,787 INFO L420 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:26:27,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:27,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1175937616, now seen corresponding path program 6 times [2024-06-21 16:26:27,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:27,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471622281] [2024-06-21 16:26:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:27,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:28,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:28,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471622281] [2024-06-21 16:26:28,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471622281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:28,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:28,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:26:28,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887334174] [2024-06-21 16:26:28,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:28,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:26:28,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:28,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:26:28,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:26:28,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:26:28,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 341 transitions, 3336 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:28,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:28,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:26:28,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:29,739 INFO L124 PetriNetUnfolderBase]: 1006/1982 cut-off events. [2024-06-21 16:26:29,739 INFO L125 PetriNetUnfolderBase]: For 795067/795067 co-relation queries the response was YES. [2024-06-21 16:26:29,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19093 conditions, 1982 events. 1006/1982 cut-off events. For 795067/795067 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 12613 event pairs, 217 based on Foata normal form. 2/1983 useless extension candidates. Maximal degree in co-relation 18897. Up to 1402 conditions per place. [2024-06-21 16:26:29,764 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 262 selfloop transitions, 99 changer transitions 0/363 dead transitions. [2024-06-21 16:26:29,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 363 transitions, 4136 flow [2024-06-21 16:26:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:26:29,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:26:29,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-06-21 16:26:29,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880208333333333 [2024-06-21 16:26:29,765 INFO L175 Difference]: Start difference. First operand has 469 places, 341 transitions, 3336 flow. Second operand 12 states and 149 transitions. [2024-06-21 16:26:29,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 363 transitions, 4136 flow [2024-06-21 16:26:33,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 363 transitions, 3930 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 16:26:33,654 INFO L231 Difference]: Finished difference. Result has 467 places, 342 transitions, 3354 flow [2024-06-21 16:26:33,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3130, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3354, PETRI_PLACES=467, PETRI_TRANSITIONS=342} [2024-06-21 16:26:33,655 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 436 predicate places. [2024-06-21 16:26:33,655 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 342 transitions, 3354 flow [2024-06-21 16:26:33,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:33,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:33,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:33,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2024-06-21 16:26:33,655 INFO L420 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:26:33,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:33,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1412301270, now seen corresponding path program 26 times [2024-06-21 16:26:33,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:33,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310079521] [2024-06-21 16:26:33,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:33,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:34,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:34,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310079521] [2024-06-21 16:26:34,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310079521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:34,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:34,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:26:34,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213826075] [2024-06-21 16:26:34,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:34,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:26:34,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:34,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:26:34,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:26:35,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:26:35,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 342 transitions, 3354 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:35,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:35,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:26:35,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:35,865 INFO L124 PetriNetUnfolderBase]: 1031/2033 cut-off events. [2024-06-21 16:26:35,865 INFO L125 PetriNetUnfolderBase]: For 885964/885964 co-relation queries the response was YES. [2024-06-21 16:26:35,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19396 conditions, 2033 events. 1031/2033 cut-off events. For 885964/885964 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 13040 event pairs, 340 based on Foata normal form. 10/2042 useless extension candidates. Maximal degree in co-relation 19201. Up to 1623 conditions per place. [2024-06-21 16:26:35,895 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 307 selfloop transitions, 67 changer transitions 11/387 dead transitions. [2024-06-21 16:26:35,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 387 transitions, 4441 flow [2024-06-21 16:26:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:26:35,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:26:35,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 165 transitions. [2024-06-21 16:26:35,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36830357142857145 [2024-06-21 16:26:35,896 INFO L175 Difference]: Start difference. First operand has 467 places, 342 transitions, 3354 flow. Second operand 14 states and 165 transitions. [2024-06-21 16:26:35,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 387 transitions, 4441 flow [2024-06-21 16:26:38,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 387 transitions, 4215 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-21 16:26:38,997 INFO L231 Difference]: Finished difference. Result has 475 places, 348 transitions, 3351 flow [2024-06-21 16:26:38,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3140, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3351, PETRI_PLACES=475, PETRI_TRANSITIONS=348} [2024-06-21 16:26:38,998 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 444 predicate places. [2024-06-21 16:26:38,998 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 348 transitions, 3351 flow [2024-06-21 16:26:38,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:38,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:38,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:38,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2024-06-21 16:26:38,998 INFO L420 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:26:38,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:38,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1175649316, now seen corresponding path program 7 times [2024-06-21 16:26:38,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:38,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989727238] [2024-06-21 16:26:38,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:38,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:40,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:40,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989727238] [2024-06-21 16:26:40,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989727238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:40,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:40,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:26:40,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493602385] [2024-06-21 16:26:40,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:40,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:26:40,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:40,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:26:40,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:26:40,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:26:40,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 348 transitions, 3351 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:40,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:40,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:26:40,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:40,949 INFO L124 PetriNetUnfolderBase]: 1018/2006 cut-off events. [2024-06-21 16:26:40,949 INFO L125 PetriNetUnfolderBase]: For 821322/821322 co-relation queries the response was YES. [2024-06-21 16:26:40,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19513 conditions, 2006 events. 1018/2006 cut-off events. For 821322/821322 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 12832 event pairs, 224 based on Foata normal form. 2/2007 useless extension candidates. Maximal degree in co-relation 19313. Up to 1383 conditions per place. [2024-06-21 16:26:40,983 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 266 selfloop transitions, 104 changer transitions 0/372 dead transitions. [2024-06-21 16:26:40,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 372 transitions, 4517 flow [2024-06-21 16:26:40,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:26:40,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:26:40,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2024-06-21 16:26:40,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 16:26:40,985 INFO L175 Difference]: Start difference. First operand has 475 places, 348 transitions, 3351 flow. Second operand 12 states and 152 transitions. [2024-06-21 16:26:40,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 372 transitions, 4517 flow [2024-06-21 16:26:45,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 372 transitions, 4426 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 16:26:45,298 INFO L231 Difference]: Finished difference. Result has 478 places, 350 transitions, 3520 flow [2024-06-21 16:26:45,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3262, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3520, PETRI_PLACES=478, PETRI_TRANSITIONS=350} [2024-06-21 16:26:45,299 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 447 predicate places. [2024-06-21 16:26:45,299 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 350 transitions, 3520 flow [2024-06-21 16:26:45,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:45,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:45,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:45,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2024-06-21 16:26:45,300 INFO L420 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:26:45,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:45,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1412305920, now seen corresponding path program 27 times [2024-06-21 16:26:45,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:45,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011470189] [2024-06-21 16:26:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:45,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:46,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:46,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011470189] [2024-06-21 16:26:46,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011470189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:46,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:46,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:26:46,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860725455] [2024-06-21 16:26:46,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:46,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:26:46,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:46,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:26:46,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:26:46,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:26:46,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 350 transitions, 3520 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:46,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:46,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:26:46,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:47,239 INFO L124 PetriNetUnfolderBase]: 1059/2093 cut-off events. [2024-06-21 16:26:47,239 INFO L125 PetriNetUnfolderBase]: For 1024294/1024294 co-relation queries the response was YES. [2024-06-21 16:26:47,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21900 conditions, 2093 events. 1059/2093 cut-off events. For 1024294/1024294 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 13498 event pairs, 237 based on Foata normal form. 8/2100 useless extension candidates. Maximal degree in co-relation 21701. Up to 1412 conditions per place. [2024-06-21 16:26:47,269 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 263 selfloop transitions, 105 changer transitions 10/380 dead transitions. [2024-06-21 16:26:47,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 380 transitions, 4848 flow [2024-06-21 16:26:47,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:26:47,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:26:47,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 165 transitions. [2024-06-21 16:26:47,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39663461538461536 [2024-06-21 16:26:47,270 INFO L175 Difference]: Start difference. First operand has 478 places, 350 transitions, 3520 flow. Second operand 13 states and 165 transitions. [2024-06-21 16:26:47,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 380 transitions, 4848 flow [2024-06-21 16:26:52,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 380 transitions, 4692 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 16:26:52,413 INFO L231 Difference]: Finished difference. Result has 483 places, 345 transitions, 3527 flow [2024-06-21 16:26:52,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3527, PETRI_PLACES=483, PETRI_TRANSITIONS=345} [2024-06-21 16:26:52,413 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 452 predicate places. [2024-06-21 16:26:52,413 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 345 transitions, 3527 flow [2024-06-21 16:26:52,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:52,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:52,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:52,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2024-06-21 16:26:52,414 INFO L420 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:26:52,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:52,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1405626226, now seen corresponding path program 8 times [2024-06-21 16:26:52,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:52,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227061053] [2024-06-21 16:26:52,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:52,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:53,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:53,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227061053] [2024-06-21 16:26:53,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227061053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:53,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:53,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:26:53,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770964131] [2024-06-21 16:26:53,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:53,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:26:53,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:53,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:26:53,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:26:53,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:26:53,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 345 transitions, 3527 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:53,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:53,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:26:53,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:54,083 INFO L124 PetriNetUnfolderBase]: 1034/2042 cut-off events. [2024-06-21 16:26:54,083 INFO L125 PetriNetUnfolderBase]: For 934794/934794 co-relation queries the response was YES. [2024-06-21 16:26:54,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21465 conditions, 2042 events. 1034/2042 cut-off events. For 934794/934794 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 13095 event pairs, 240 based on Foata normal form. 2/2043 useless extension candidates. Maximal degree in co-relation 21264. Up to 1465 conditions per place. [2024-06-21 16:26:54,117 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 259 selfloop transitions, 105 changer transitions 0/366 dead transitions. [2024-06-21 16:26:54,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 366 transitions, 4313 flow [2024-06-21 16:26:54,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:26:54,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:26:54,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-06-21 16:26:54,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880208333333333 [2024-06-21 16:26:54,118 INFO L175 Difference]: Start difference. First operand has 483 places, 345 transitions, 3527 flow. Second operand 12 states and 149 transitions. [2024-06-21 16:26:54,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 366 transitions, 4313 flow [2024-06-21 16:26:59,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 366 transitions, 4083 flow, removed 11 selfloop flow, removed 13 redundant places. [2024-06-21 16:26:59,194 INFO L231 Difference]: Finished difference. Result has 478 places, 345 transitions, 3511 flow [2024-06-21 16:26:59,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3511, PETRI_PLACES=478, PETRI_TRANSITIONS=345} [2024-06-21 16:26:59,194 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 447 predicate places. [2024-06-21 16:26:59,195 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 345 transitions, 3511 flow [2024-06-21 16:26:59,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:59,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:59,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:59,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2024-06-21 16:26:59,195 INFO L420 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:26:59,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:59,196 INFO L85 PathProgramCache]: Analyzing trace with hash -590793140, now seen corresponding path program 9 times [2024-06-21 16:26:59,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:59,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584684034] [2024-06-21 16:26:59,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:59,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:00,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:00,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584684034] [2024-06-21 16:27:00,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584684034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:00,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:00,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:27:00,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153024406] [2024-06-21 16:27:00,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:00,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:27:00,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:00,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:27:00,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:27:00,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:27:00,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 345 transitions, 3511 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:00,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:00,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:27:00,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:00,998 INFO L124 PetriNetUnfolderBase]: 1038/2050 cut-off events. [2024-06-21 16:27:00,999 INFO L125 PetriNetUnfolderBase]: For 923469/923469 co-relation queries the response was YES. [2024-06-21 16:27:01,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21435 conditions, 2050 events. 1038/2050 cut-off events. For 923469/923469 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 13169 event pairs, 238 based on Foata normal form. 2/2051 useless extension candidates. Maximal degree in co-relation 21236. Up to 1473 conditions per place. [2024-06-21 16:27:01,031 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 262 selfloop transitions, 103 changer transitions 0/367 dead transitions. [2024-06-21 16:27:01,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 367 transitions, 4323 flow [2024-06-21 16:27:01,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:27:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:27:01,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2024-06-21 16:27:01,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-21 16:27:01,033 INFO L175 Difference]: Start difference. First operand has 478 places, 345 transitions, 3511 flow. Second operand 12 states and 150 transitions. [2024-06-21 16:27:01,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 367 transitions, 4323 flow [2024-06-21 16:27:05,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 367 transitions, 4104 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 16:27:05,946 INFO L231 Difference]: Finished difference. Result has 479 places, 346 transitions, 3528 flow [2024-06-21 16:27:05,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3292, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3528, PETRI_PLACES=479, PETRI_TRANSITIONS=346} [2024-06-21 16:27:05,947 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 448 predicate places. [2024-06-21 16:27:05,947 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 346 transitions, 3528 flow [2024-06-21 16:27:05,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:05,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:05,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:05,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2024-06-21 16:27:05,948 INFO L420 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:27:05,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:05,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1758945138, now seen corresponding path program 10 times [2024-06-21 16:27:05,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:05,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595587459] [2024-06-21 16:27:05,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:05,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:07,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:07,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:07,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595587459] [2024-06-21 16:27:07,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595587459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:07,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:07,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:27:07,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143002464] [2024-06-21 16:27:07,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:07,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:27:07,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:07,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:27:07,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:27:07,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:27:07,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 346 transitions, 3528 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:07,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:07,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:27:07,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:07,895 INFO L124 PetriNetUnfolderBase]: 1042/2058 cut-off events. [2024-06-21 16:27:07,896 INFO L125 PetriNetUnfolderBase]: For 935246/935246 co-relation queries the response was YES. [2024-06-21 16:27:07,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21568 conditions, 2058 events. 1042/2058 cut-off events. For 935246/935246 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 13209 event pairs, 248 based on Foata normal form. 2/2059 useless extension candidates. Maximal degree in co-relation 21368. Up to 1481 conditions per place. [2024-06-21 16:27:07,926 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 257 selfloop transitions, 108 changer transitions 0/367 dead transitions. [2024-06-21 16:27:07,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 367 transitions, 4338 flow [2024-06-21 16:27:07,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:27:07,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:27:07,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-06-21 16:27:07,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3776041666666667 [2024-06-21 16:27:07,927 INFO L175 Difference]: Start difference. First operand has 479 places, 346 transitions, 3528 flow. Second operand 12 states and 145 transitions. [2024-06-21 16:27:07,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 367 transitions, 4338 flow [2024-06-21 16:27:12,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 367 transitions, 4112 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-21 16:27:12,491 INFO L231 Difference]: Finished difference. Result has 481 places, 347 transitions, 3550 flow [2024-06-21 16:27:12,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3302, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3550, PETRI_PLACES=481, PETRI_TRANSITIONS=347} [2024-06-21 16:27:12,491 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 450 predicate places. [2024-06-21 16:27:12,491 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 347 transitions, 3550 flow [2024-06-21 16:27:12,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:12,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:12,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:12,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2024-06-21 16:27:12,492 INFO L420 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:27:12,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:12,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1758656838, now seen corresponding path program 11 times [2024-06-21 16:27:12,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:12,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469819775] [2024-06-21 16:27:12,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:12,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:13,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:13,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469819775] [2024-06-21 16:27:13,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469819775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:13,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:13,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:27:13,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028538436] [2024-06-21 16:27:13,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:13,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:27:13,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:13,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:27:13,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:27:13,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:27:13,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 347 transitions, 3550 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:13,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:13,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:27:13,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:14,377 INFO L124 PetriNetUnfolderBase]: 1046/2066 cut-off events. [2024-06-21 16:27:14,378 INFO L125 PetriNetUnfolderBase]: For 946847/946847 co-relation queries the response was YES. [2024-06-21 16:27:14,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21697 conditions, 2066 events. 1046/2066 cut-off events. For 946847/946847 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 13288 event pairs, 248 based on Foata normal form. 2/2067 useless extension candidates. Maximal degree in co-relation 21496. Up to 1465 conditions per place. [2024-06-21 16:27:14,409 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 258 selfloop transitions, 108 changer transitions 0/368 dead transitions. [2024-06-21 16:27:14,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 368 transitions, 4362 flow [2024-06-21 16:27:14,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:27:14,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:27:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-06-21 16:27:14,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3828125 [2024-06-21 16:27:14,410 INFO L175 Difference]: Start difference. First operand has 481 places, 347 transitions, 3550 flow. Second operand 12 states and 147 transitions. [2024-06-21 16:27:14,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 368 transitions, 4362 flow [2024-06-21 16:27:18,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 368 transitions, 4124 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-21 16:27:18,744 INFO L231 Difference]: Finished difference. Result has 483 places, 348 transitions, 3562 flow [2024-06-21 16:27:18,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3312, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3562, PETRI_PLACES=483, PETRI_TRANSITIONS=348} [2024-06-21 16:27:18,745 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 452 predicate places. [2024-06-21 16:27:18,745 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 348 transitions, 3562 flow [2024-06-21 16:27:18,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:18,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:18,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:18,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2024-06-21 16:27:18,746 INFO L420 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:27:18,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:18,747 INFO L85 PathProgramCache]: Analyzing trace with hash 341855134, now seen corresponding path program 12 times [2024-06-21 16:27:18,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:18,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622322198] [2024-06-21 16:27:18,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:18,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:19,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:19,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622322198] [2024-06-21 16:27:19,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622322198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:19,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:19,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:27:19,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774713469] [2024-06-21 16:27:19,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:19,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:27:19,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:19,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:27:19,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:27:19,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:27:19,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 348 transitions, 3562 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:19,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:19,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:27:19,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:20,498 INFO L124 PetriNetUnfolderBase]: 1050/2074 cut-off events. [2024-06-21 16:27:20,498 INFO L125 PetriNetUnfolderBase]: For 958590/958590 co-relation queries the response was YES. [2024-06-21 16:27:20,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21806 conditions, 2074 events. 1050/2074 cut-off events. For 958590/958590 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 13370 event pairs, 248 based on Foata normal form. 2/2075 useless extension candidates. Maximal degree in co-relation 21604. Up to 1497 conditions per place. [2024-06-21 16:27:20,544 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 272 selfloop transitions, 97 changer transitions 0/371 dead transitions. [2024-06-21 16:27:20,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 371 transitions, 4392 flow [2024-06-21 16:27:20,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:27:20,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:27:20,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 154 transitions. [2024-06-21 16:27:20,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010416666666667 [2024-06-21 16:27:20,545 INFO L175 Difference]: Start difference. First operand has 483 places, 348 transitions, 3562 flow. Second operand 12 states and 154 transitions. [2024-06-21 16:27:20,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 371 transitions, 4392 flow [2024-06-21 16:27:25,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 371 transitions, 4152 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-21 16:27:25,315 INFO L231 Difference]: Finished difference. Result has 485 places, 349 transitions, 3552 flow [2024-06-21 16:27:25,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3552, PETRI_PLACES=485, PETRI_TRANSITIONS=349} [2024-06-21 16:27:25,316 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 454 predicate places. [2024-06-21 16:27:25,316 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 349 transitions, 3552 flow [2024-06-21 16:27:25,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:25,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:25,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:25,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2024-06-21 16:27:25,316 INFO L420 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:27:25,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:25,317 INFO L85 PathProgramCache]: Analyzing trace with hash 481784094, now seen corresponding path program 13 times [2024-06-21 16:27:25,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:25,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468523144] [2024-06-21 16:27:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:25,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:26,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:26,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468523144] [2024-06-21 16:27:26,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468523144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:26,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:26,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:27:26,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527871345] [2024-06-21 16:27:26,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:26,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:27:26,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:26,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:27:26,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:27:26,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:27:26,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 349 transitions, 3552 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:26,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:26,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:27:26,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:27,594 INFO L124 PetriNetUnfolderBase]: 1054/2082 cut-off events. [2024-06-21 16:27:27,595 INFO L125 PetriNetUnfolderBase]: For 970293/970293 co-relation queries the response was YES. [2024-06-21 16:27:27,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21875 conditions, 2082 events. 1054/2082 cut-off events. For 970293/970293 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 13429 event pairs, 250 based on Foata normal form. 2/2083 useless extension candidates. Maximal degree in co-relation 21672. Up to 1505 conditions per place. [2024-06-21 16:27:27,627 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 272 selfloop transitions, 97 changer transitions 0/371 dead transitions. [2024-06-21 16:27:27,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 371 transitions, 4380 flow [2024-06-21 16:27:27,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:27:27,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:27:27,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2024-06-21 16:27:27,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-21 16:27:27,628 INFO L175 Difference]: Start difference. First operand has 485 places, 349 transitions, 3552 flow. Second operand 12 states and 150 transitions. [2024-06-21 16:27:27,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 371 transitions, 4380 flow [2024-06-21 16:27:33,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 371 transitions, 4160 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-21 16:27:33,039 INFO L231 Difference]: Finished difference. Result has 487 places, 350 transitions, 3564 flow [2024-06-21 16:27:33,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3332, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3564, PETRI_PLACES=487, PETRI_TRANSITIONS=350} [2024-06-21 16:27:33,040 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 456 predicate places. [2024-06-21 16:27:33,040 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 350 transitions, 3564 flow [2024-06-21 16:27:33,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:33,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:33,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:33,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2024-06-21 16:27:33,040 INFO L420 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:27:33,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:33,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1748825808, now seen corresponding path program 14 times [2024-06-21 16:27:33,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:33,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136151109] [2024-06-21 16:27:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:33,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:34,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:34,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136151109] [2024-06-21 16:27:34,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136151109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:34,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:34,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:27:34,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517691246] [2024-06-21 16:27:34,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:34,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:27:34,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:34,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:27:34,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:27:34,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:27:34,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 350 transitions, 3564 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:34,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:34,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:27:34,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:35,140 INFO L124 PetriNetUnfolderBase]: 1065/2103 cut-off events. [2024-06-21 16:27:35,140 INFO L125 PetriNetUnfolderBase]: For 1010663/1010663 co-relation queries the response was YES. [2024-06-21 16:27:35,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22444 conditions, 2103 events. 1065/2103 cut-off events. For 1010663/1010663 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 13579 event pairs, 261 based on Foata normal form. 2/2104 useless extension candidates. Maximal degree in co-relation 22240. Up to 1251 conditions per place. [2024-06-21 16:27:35,175 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 251 selfloop transitions, 120 changer transitions 0/373 dead transitions. [2024-06-21 16:27:35,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 373 transitions, 4760 flow [2024-06-21 16:27:35,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:27:35,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:27:35,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-21 16:27:35,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854166666666667 [2024-06-21 16:27:35,177 INFO L175 Difference]: Start difference. First operand has 487 places, 350 transitions, 3564 flow. Second operand 12 states and 148 transitions. [2024-06-21 16:27:35,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 373 transitions, 4760 flow [2024-06-21 16:27:41,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 373 transitions, 4538 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-21 16:27:41,306 INFO L231 Difference]: Finished difference. Result has 489 places, 352 transitions, 3656 flow [2024-06-21 16:27:41,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3342, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3656, PETRI_PLACES=489, PETRI_TRANSITIONS=352} [2024-06-21 16:27:41,307 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 458 predicate places. [2024-06-21 16:27:41,307 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 352 transitions, 3656 flow [2024-06-21 16:27:41,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:41,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:41,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:41,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2024-06-21 16:27:41,307 INFO L420 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:27:41,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:41,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1381974324, now seen corresponding path program 28 times [2024-06-21 16:27:41,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:41,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359383833] [2024-06-21 16:27:41,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:41,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:42,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:42,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359383833] [2024-06-21 16:27:42,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359383833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:42,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:42,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:27:42,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452608811] [2024-06-21 16:27:42,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:42,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:27:42,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:42,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:27:42,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:27:42,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:27:42,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 352 transitions, 3656 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:42,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:42,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:27:42,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:43,644 INFO L124 PetriNetUnfolderBase]: 1088/2152 cut-off events. [2024-06-21 16:27:43,644 INFO L125 PetriNetUnfolderBase]: For 1131701/1131701 co-relation queries the response was YES. [2024-06-21 16:27:43,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22907 conditions, 2152 events. 1088/2152 cut-off events. For 1131701/1131701 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 13976 event pairs, 399 based on Foata normal form. 10/2161 useless extension candidates. Maximal degree in co-relation 22702. Up to 1745 conditions per place. [2024-06-21 16:27:43,679 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 313 selfloop transitions, 62 changer transitions 15/392 dead transitions. [2024-06-21 16:27:43,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 392 transitions, 4730 flow [2024-06-21 16:27:43,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:27:43,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:27:43,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 166 transitions. [2024-06-21 16:27:43,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3705357142857143 [2024-06-21 16:27:43,680 INFO L175 Difference]: Start difference. First operand has 489 places, 352 transitions, 3656 flow. Second operand 14 states and 166 transitions. [2024-06-21 16:27:43,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 392 transitions, 4730 flow [2024-06-21 16:27:48,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 392 transitions, 4531 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 16:27:48,318 INFO L231 Difference]: Finished difference. Result has 498 places, 351 transitions, 3598 flow [2024-06-21 16:27:48,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3477, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3598, PETRI_PLACES=498, PETRI_TRANSITIONS=351} [2024-06-21 16:27:48,318 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 467 predicate places. [2024-06-21 16:27:48,318 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 351 transitions, 3598 flow [2024-06-21 16:27:48,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:48,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:48,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:48,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2024-06-21 16:27:48,319 INFO L420 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:27:48,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:48,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1552796724, now seen corresponding path program 29 times [2024-06-21 16:27:48,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:48,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978065812] [2024-06-21 16:27:48,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:48,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:49,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:49,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978065812] [2024-06-21 16:27:49,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978065812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:49,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:49,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:27:49,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156128045] [2024-06-21 16:27:49,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:49,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:27:49,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:49,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:27:49,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:27:49,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:27:49,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 351 transitions, 3598 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:49,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:49,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:27:49,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:50,216 INFO L124 PetriNetUnfolderBase]: 1103/2185 cut-off events. [2024-06-21 16:27:50,216 INFO L125 PetriNetUnfolderBase]: For 1254747/1254747 co-relation queries the response was YES. [2024-06-21 16:27:50,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24887 conditions, 2185 events. 1103/2185 cut-off events. For 1254747/1254747 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14183 event pairs, 252 based on Foata normal form. 8/2192 useless extension candidates. Maximal degree in co-relation 24677. Up to 1308 conditions per place. [2024-06-21 16:27:50,252 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 260 selfloop transitions, 110 changer transitions 10/382 dead transitions. [2024-06-21 16:27:50,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 382 transitions, 4946 flow [2024-06-21 16:27:50,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:27:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:27:50,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 168 transitions. [2024-06-21 16:27:50,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-06-21 16:27:50,253 INFO L175 Difference]: Start difference. First operand has 498 places, 351 transitions, 3598 flow. Second operand 13 states and 168 transitions. [2024-06-21 16:27:50,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 382 transitions, 4946 flow [2024-06-21 16:27:55,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 382 transitions, 4763 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 16:27:55,663 INFO L231 Difference]: Finished difference. Result has 497 places, 348 transitions, 3625 flow [2024-06-21 16:27:55,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3417, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3625, PETRI_PLACES=497, PETRI_TRANSITIONS=348} [2024-06-21 16:27:55,663 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 466 predicate places. [2024-06-21 16:27:55,663 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 348 transitions, 3625 flow [2024-06-21 16:27:55,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:55,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:55,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:55,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2024-06-21 16:27:55,664 INFO L420 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:27:55,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:55,664 INFO L85 PathProgramCache]: Analyzing trace with hash 571832044, now seen corresponding path program 15 times [2024-06-21 16:27:55,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:55,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269048803] [2024-06-21 16:27:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:55,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:56,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:56,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269048803] [2024-06-21 16:27:56,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269048803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:56,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:56,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:27:56,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668688505] [2024-06-21 16:27:56,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:56,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:27:56,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:56,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:27:56,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:27:56,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:27:56,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 348 transitions, 3625 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:56,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:56,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:27:56,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:57,732 INFO L124 PetriNetUnfolderBase]: 1078/2134 cut-off events. [2024-06-21 16:27:57,732 INFO L125 PetriNetUnfolderBase]: For 1144595/1144595 co-relation queries the response was YES. [2024-06-21 16:27:57,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24349 conditions, 2134 events. 1078/2134 cut-off events. For 1144595/1144595 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 13751 event pairs, 273 based on Foata normal form. 2/2135 useless extension candidates. Maximal degree in co-relation 24141. Up to 1504 conditions per place. [2024-06-21 16:27:57,766 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 269 selfloop transitions, 98 changer transitions 0/369 dead transitions. [2024-06-21 16:27:57,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 369 transitions, 4415 flow [2024-06-21 16:27:57,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:27:57,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:27:57,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2024-06-21 16:27:57,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 16:27:57,767 INFO L175 Difference]: Start difference. First operand has 497 places, 348 transitions, 3625 flow. Second operand 12 states and 152 transitions. [2024-06-21 16:27:57,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 369 transitions, 4415 flow [2024-06-21 16:28:03,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 369 transitions, 4196 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 16:28:03,521 INFO L231 Difference]: Finished difference. Result has 493 places, 348 transitions, 3606 flow [2024-06-21 16:28:03,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3406, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3606, PETRI_PLACES=493, PETRI_TRANSITIONS=348} [2024-06-21 16:28:03,522 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 462 predicate places. [2024-06-21 16:28:03,522 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 348 transitions, 3606 flow [2024-06-21 16:28:03,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:03,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:03,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:03,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2024-06-21 16:28:03,522 INFO L420 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:28:03,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:03,523 INFO L85 PathProgramCache]: Analyzing trace with hash 335180090, now seen corresponding path program 30 times [2024-06-21 16:28:03,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:03,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585437360] [2024-06-21 16:28:03,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:03,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:04,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:04,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585437360] [2024-06-21 16:28:04,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585437360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:04,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:04,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:28:04,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959677464] [2024-06-21 16:28:04,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:04,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:28:04,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:04,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:28:04,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:28:04,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:28:04,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 348 transitions, 3606 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:04,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:04,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:28:04,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:05,747 INFO L124 PetriNetUnfolderBase]: 1103/2185 cut-off events. [2024-06-21 16:28:05,747 INFO L125 PetriNetUnfolderBase]: For 1225738/1225738 co-relation queries the response was YES. [2024-06-21 16:28:05,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24545 conditions, 2185 events. 1103/2185 cut-off events. For 1225738/1225738 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 14190 event pairs, 420 based on Foata normal form. 10/2194 useless extension candidates. Maximal degree in co-relation 24339. Up to 1781 conditions per place. [2024-06-21 16:28:05,783 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 314 selfloop transitions, 61 changer transitions 11/388 dead transitions. [2024-06-21 16:28:05,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 388 transitions, 4659 flow [2024-06-21 16:28:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:28:05,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:28:05,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 167 transitions. [2024-06-21 16:28:05,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37276785714285715 [2024-06-21 16:28:05,784 INFO L175 Difference]: Start difference. First operand has 493 places, 348 transitions, 3606 flow. Second operand 14 states and 167 transitions. [2024-06-21 16:28:05,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 388 transitions, 4659 flow [2024-06-21 16:28:10,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 388 transitions, 4327 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-06-21 16:28:10,295 INFO L231 Difference]: Finished difference. Result has 498 places, 350 transitions, 3436 flow [2024-06-21 16:28:10,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3280, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3436, PETRI_PLACES=498, PETRI_TRANSITIONS=350} [2024-06-21 16:28:10,295 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 467 predicate places. [2024-06-21 16:28:10,296 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 350 transitions, 3436 flow [2024-06-21 16:28:10,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:10,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:10,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:10,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2024-06-21 16:28:10,296 INFO L420 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:28:10,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:10,297 INFO L85 PathProgramCache]: Analyzing trace with hash 335175440, now seen corresponding path program 31 times [2024-06-21 16:28:10,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:10,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437155668] [2024-06-21 16:28:10,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:10,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:11,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:11,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:11,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437155668] [2024-06-21 16:28:11,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437155668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:11,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:11,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:28:11,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272122520] [2024-06-21 16:28:11,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:11,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:28:11,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:11,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:28:11,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:28:11,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:28:11,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 350 transitions, 3436 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:11,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:11,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:28:11,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:12,497 INFO L124 PetriNetUnfolderBase]: 1120/2224 cut-off events. [2024-06-21 16:28:12,497 INFO L125 PetriNetUnfolderBase]: For 1348303/1348303 co-relation queries the response was YES. [2024-06-21 16:28:12,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26279 conditions, 2224 events. 1120/2224 cut-off events. For 1348303/1348303 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 14497 event pairs, 286 based on Foata normal form. 8/2231 useless extension candidates. Maximal degree in co-relation 26070. Up to 1549 conditions per place. [2024-06-21 16:28:12,538 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 274 selfloop transitions, 95 changer transitions 10/381 dead transitions. [2024-06-21 16:28:12,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 381 transitions, 4782 flow [2024-06-21 16:28:12,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:28:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:28:12,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 170 transitions. [2024-06-21 16:28:12,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40865384615384615 [2024-06-21 16:28:12,539 INFO L175 Difference]: Start difference. First operand has 498 places, 350 transitions, 3436 flow. Second operand 13 states and 170 transitions. [2024-06-21 16:28:12,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 381 transitions, 4782 flow [2024-06-21 16:28:17,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 381 transitions, 4681 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 16:28:17,985 INFO L231 Difference]: Finished difference. Result has 501 places, 345 transitions, 3478 flow [2024-06-21 16:28:17,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3337, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3478, PETRI_PLACES=501, PETRI_TRANSITIONS=345} [2024-06-21 16:28:17,985 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 470 predicate places. [2024-06-21 16:28:17,985 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 345 transitions, 3478 flow [2024-06-21 16:28:17,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:17,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:17,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:17,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2024-06-21 16:28:17,986 INFO L420 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:28:17,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:17,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1548208104, now seen corresponding path program 32 times [2024-06-21 16:28:17,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:17,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265944607] [2024-06-21 16:28:17,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:17,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:18,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:18,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:18,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265944607] [2024-06-21 16:28:18,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265944607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:18,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:18,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:28:18,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824706937] [2024-06-21 16:28:18,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:18,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:28:18,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:18,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:28:18,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:28:19,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:28:19,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 345 transitions, 3478 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:19,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:19,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:28:19,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:19,824 INFO L124 PetriNetUnfolderBase]: 1123/2229 cut-off events. [2024-06-21 16:28:19,824 INFO L125 PetriNetUnfolderBase]: For 1378026/1378026 co-relation queries the response was YES. [2024-06-21 16:28:19,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26482 conditions, 2229 events. 1123/2229 cut-off events. For 1378026/1378026 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14577 event pairs, 440 based on Foata normal form. 10/2238 useless extension candidates. Maximal degree in co-relation 26274. Up to 1780 conditions per place. [2024-06-21 16:28:19,859 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 296 selfloop transitions, 74 changer transitions 11/383 dead transitions. [2024-06-21 16:28:19,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 383 transitions, 4508 flow [2024-06-21 16:28:19,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:28:19,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:28:19,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 159 transitions. [2024-06-21 16:28:19,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38221153846153844 [2024-06-21 16:28:19,860 INFO L175 Difference]: Start difference. First operand has 501 places, 345 transitions, 3478 flow. Second operand 13 states and 159 transitions. [2024-06-21 16:28:19,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 383 transitions, 4508 flow [2024-06-21 16:28:24,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 383 transitions, 4312 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 16:28:24,183 INFO L231 Difference]: Finished difference. Result has 500 places, 347 transitions, 3472 flow [2024-06-21 16:28:24,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3282, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3472, PETRI_PLACES=500, PETRI_TRANSITIONS=347} [2024-06-21 16:28:24,183 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 469 predicate places. [2024-06-21 16:28:24,183 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 347 transitions, 3472 flow [2024-06-21 16:28:24,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:24,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:24,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:24,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2024-06-21 16:28:24,184 INFO L420 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:28:24,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:24,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1548212754, now seen corresponding path program 33 times [2024-06-21 16:28:24,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:24,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715529167] [2024-06-21 16:28:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:24,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:25,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:25,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715529167] [2024-06-21 16:28:25,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715529167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:25,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:25,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:28:25,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669653448] [2024-06-21 16:28:25,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:25,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:28:25,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:25,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:28:25,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:28:25,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:28:25,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 347 transitions, 3472 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:25,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:25,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:28:25,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:26,097 INFO L124 PetriNetUnfolderBase]: 1150/2286 cut-off events. [2024-06-21 16:28:26,098 INFO L125 PetriNetUnfolderBase]: For 1468591/1468591 co-relation queries the response was YES. [2024-06-21 16:28:26,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28395 conditions, 2286 events. 1150/2286 cut-off events. For 1468591/1468591 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 14998 event pairs, 301 based on Foata normal form. 8/2293 useless extension candidates. Maximal degree in co-relation 28186. Up to 1566 conditions per place. [2024-06-21 16:28:26,134 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 255 selfloop transitions, 113 changer transitions 10/380 dead transitions. [2024-06-21 16:28:26,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 380 transitions, 4829 flow [2024-06-21 16:28:26,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:28:26,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:28:26,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 167 transitions. [2024-06-21 16:28:26,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014423076923077 [2024-06-21 16:28:26,136 INFO L175 Difference]: Start difference. First operand has 500 places, 347 transitions, 3472 flow. Second operand 13 states and 167 transitions. [2024-06-21 16:28:26,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 380 transitions, 4829 flow [2024-06-21 16:28:30,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 380 transitions, 4689 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 16:28:30,776 INFO L231 Difference]: Finished difference. Result has 505 places, 345 transitions, 3529 flow [2024-06-21 16:28:30,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3338, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3529, PETRI_PLACES=505, PETRI_TRANSITIONS=345} [2024-06-21 16:28:30,777 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 474 predicate places. [2024-06-21 16:28:30,777 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 345 transitions, 3529 flow [2024-06-21 16:28:30,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:30,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:30,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:30,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2024-06-21 16:28:30,777 INFO L420 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:28:30,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:30,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1552681404, now seen corresponding path program 34 times [2024-06-21 16:28:30,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:30,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358518356] [2024-06-21 16:28:30,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:30,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:31,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:31,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358518356] [2024-06-21 16:28:31,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358518356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:31,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:31,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:28:31,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702206984] [2024-06-21 16:28:31,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:31,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:28:31,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:31,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:28:31,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:28:31,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:28:31,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 345 transitions, 3529 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:31,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:31,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:28:31,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:32,836 INFO L124 PetriNetUnfolderBase]: 1140/2268 cut-off events. [2024-06-21 16:28:32,837 INFO L125 PetriNetUnfolderBase]: For 1469880/1469880 co-relation queries the response was YES. [2024-06-21 16:28:32,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28418 conditions, 2268 events. 1140/2268 cut-off events. For 1469880/1469880 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 14840 event pairs, 287 based on Foata normal form. 8/2275 useless extension candidates. Maximal degree in co-relation 28208. Up to 1498 conditions per place. [2024-06-21 16:28:32,872 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 258 selfloop transitions, 110 changer transitions 7/377 dead transitions. [2024-06-21 16:28:32,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 377 transitions, 4867 flow [2024-06-21 16:28:32,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:28:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:28:32,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 177 transitions. [2024-06-21 16:28:32,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3950892857142857 [2024-06-21 16:28:32,873 INFO L175 Difference]: Start difference. First operand has 505 places, 345 transitions, 3529 flow. Second operand 14 states and 177 transitions. [2024-06-21 16:28:32,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 377 transitions, 4867 flow [2024-06-21 16:28:38,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 377 transitions, 4634 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 16:28:38,228 INFO L231 Difference]: Finished difference. Result has 504 places, 343 transitions, 3507 flow [2024-06-21 16:28:38,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3298, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3507, PETRI_PLACES=504, PETRI_TRANSITIONS=343} [2024-06-21 16:28:38,229 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 473 predicate places. [2024-06-21 16:28:38,229 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 343 transitions, 3507 flow [2024-06-21 16:28:38,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:38,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:38,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:38,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2024-06-21 16:28:38,230 INFO L420 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:28:38,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:38,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1552676754, now seen corresponding path program 35 times [2024-06-21 16:28:38,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:38,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770895962] [2024-06-21 16:28:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:38,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:39,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:39,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770895962] [2024-06-21 16:28:39,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770895962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:39,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:39,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:28:39,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905528940] [2024-06-21 16:28:39,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:39,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:28:39,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:39,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:28:39,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:28:39,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:28:39,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 343 transitions, 3507 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:39,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:39,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:28:39,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:40,330 INFO L124 PetriNetUnfolderBase]: 1096/2184 cut-off events. [2024-06-21 16:28:40,330 INFO L125 PetriNetUnfolderBase]: For 1362384/1362384 co-relation queries the response was YES. [2024-06-21 16:28:40,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24550 conditions, 2184 events. 1096/2184 cut-off events. For 1362384/1362384 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14191 event pairs, 271 based on Foata normal form. 20/2203 useless extension candidates. Maximal degree in co-relation 24342. Up to 1498 conditions per place. [2024-06-21 16:28:40,369 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 246 selfloop transitions, 99 changer transitions 23/370 dead transitions. [2024-06-21 16:28:40,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 370 transitions, 4429 flow [2024-06-21 16:28:40,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:28:40,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:28:40,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 171 transitions. [2024-06-21 16:28:40,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38169642857142855 [2024-06-21 16:28:40,370 INFO L175 Difference]: Start difference. First operand has 504 places, 343 transitions, 3507 flow. Second operand 14 states and 171 transitions. [2024-06-21 16:28:40,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 370 transitions, 4429 flow [2024-06-21 16:28:44,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 370 transitions, 4209 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-21 16:28:44,881 INFO L231 Difference]: Finished difference. Result has 503 places, 330 transitions, 3362 flow [2024-06-21 16:28:44,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3287, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3362, PETRI_PLACES=503, PETRI_TRANSITIONS=330} [2024-06-21 16:28:44,882 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 472 predicate places. [2024-06-21 16:28:44,882 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 330 transitions, 3362 flow [2024-06-21 16:28:44,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:44,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:44,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:44,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2024-06-21 16:28:44,882 INFO L420 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:28:44,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:44,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1709944064, now seen corresponding path program 16 times [2024-06-21 16:28:44,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:44,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884829428] [2024-06-21 16:28:44,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:44,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:46,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:46,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884829428] [2024-06-21 16:28:46,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884829428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:46,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:46,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:28:46,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11519609] [2024-06-21 16:28:46,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:46,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:28:46,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:46,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:28:46,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:28:46,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:28:46,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 330 transitions, 3362 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:46,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:46,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:28:46,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:46,957 INFO L124 PetriNetUnfolderBase]: 1044/2076 cut-off events. [2024-06-21 16:28:46,957 INFO L125 PetriNetUnfolderBase]: For 1104654/1104654 co-relation queries the response was YES. [2024-06-21 16:28:46,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23693 conditions, 2076 events. 1044/2076 cut-off events. For 1104654/1104654 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 13319 event pairs, 424 based on Foata normal form. 2/2077 useless extension candidates. Maximal degree in co-relation 23486. Up to 1881 conditions per place. [2024-06-21 16:28:46,990 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 302 selfloop transitions, 44 changer transitions 0/348 dead transitions. [2024-06-21 16:28:46,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 348 transitions, 4132 flow [2024-06-21 16:28:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:28:46,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:28:46,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-21 16:28:46,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3567708333333333 [2024-06-21 16:28:46,991 INFO L175 Difference]: Start difference. First operand has 503 places, 330 transitions, 3362 flow. Second operand 12 states and 137 transitions. [2024-06-21 16:28:46,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 348 transitions, 4132 flow [2024-06-21 16:28:51,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 348 transitions, 3888 flow, removed 11 selfloop flow, removed 18 redundant places. [2024-06-21 16:28:51,439 INFO L231 Difference]: Finished difference. Result has 483 places, 331 transitions, 3246 flow [2024-06-21 16:28:51,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3246, PETRI_PLACES=483, PETRI_TRANSITIONS=331} [2024-06-21 16:28:51,439 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 452 predicate places. [2024-06-21 16:28:51,440 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 331 transitions, 3246 flow [2024-06-21 16:28:51,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:51,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:51,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:51,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2024-06-21 16:28:51,440 INFO L420 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:28:51,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:51,440 INFO L85 PathProgramCache]: Analyzing trace with hash 930137786, now seen corresponding path program 17 times [2024-06-21 16:28:51,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:51,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739696878] [2024-06-21 16:28:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:51,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:52,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:52,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739696878] [2024-06-21 16:28:52,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739696878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:52,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:52,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:28:52,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608236940] [2024-06-21 16:28:52,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:52,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:28:52,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:52,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:28:52,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:28:52,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:28:52,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 331 transitions, 3246 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:52,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:52,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:28:52,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:53,205 INFO L124 PetriNetUnfolderBase]: 1048/2084 cut-off events. [2024-06-21 16:28:53,206 INFO L125 PetriNetUnfolderBase]: For 1026205/1026205 co-relation queries the response was YES. [2024-06-21 16:28:53,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22969 conditions, 2084 events. 1048/2084 cut-off events. For 1026205/1026205 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 13410 event pairs, 424 based on Foata normal form. 2/2085 useless extension candidates. Maximal degree in co-relation 22769. Up to 1867 conditions per place. [2024-06-21 16:28:53,238 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 302 selfloop transitions, 45 changer transitions 0/349 dead transitions. [2024-06-21 16:28:53,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 349 transitions, 4018 flow [2024-06-21 16:28:53,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:28:53,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:28:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 16:28:53,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619791666666667 [2024-06-21 16:28:53,240 INFO L175 Difference]: Start difference. First operand has 483 places, 331 transitions, 3246 flow. Second operand 12 states and 139 transitions. [2024-06-21 16:28:53,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 349 transitions, 4018 flow [2024-06-21 16:28:57,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 349 transitions, 3900 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-21 16:28:57,952 INFO L231 Difference]: Finished difference. Result has 485 places, 332 transitions, 3260 flow [2024-06-21 16:28:57,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3128, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3260, PETRI_PLACES=485, PETRI_TRANSITIONS=332} [2024-06-21 16:28:57,953 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 454 predicate places. [2024-06-21 16:28:57,953 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 332 transitions, 3260 flow [2024-06-21 16:28:57,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:57,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:57,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:57,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2024-06-21 16:28:57,953 INFO L420 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:28:57,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:57,954 INFO L85 PathProgramCache]: Analyzing trace with hash 309163406, now seen corresponding path program 18 times [2024-06-21 16:28:57,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:57,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867380024] [2024-06-21 16:28:57,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:57,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:59,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:59,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867380024] [2024-06-21 16:28:59,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867380024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:59,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:59,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:28:59,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573286982] [2024-06-21 16:28:59,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:59,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:28:59,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:59,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:28:59,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:28:59,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:28:59,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 332 transitions, 3260 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:59,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:59,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:28:59,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:00,070 INFO L124 PetriNetUnfolderBase]: 1060/2112 cut-off events. [2024-06-21 16:29:00,070 INFO L125 PetriNetUnfolderBase]: For 1107939/1107939 co-relation queries the response was YES. [2024-06-21 16:29:00,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23232 conditions, 2112 events. 1060/2112 cut-off events. For 1107939/1107939 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 13616 event pairs, 418 based on Foata normal form. 8/2119 useless extension candidates. Maximal degree in co-relation 23031. Up to 1893 conditions per place. [2024-06-21 16:29:00,102 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 293 selfloop transitions, 45 changer transitions 12/352 dead transitions. [2024-06-21 16:29:00,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 352 transitions, 4096 flow [2024-06-21 16:29:00,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:29:00,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:29:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-21 16:29:00,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.359375 [2024-06-21 16:29:00,103 INFO L175 Difference]: Start difference. First operand has 485 places, 332 transitions, 3260 flow. Second operand 12 states and 138 transitions. [2024-06-21 16:29:00,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 352 transitions, 4096 flow [2024-06-21 16:29:05,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 352 transitions, 3974 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-21 16:29:05,223 INFO L231 Difference]: Finished difference. Result has 487 places, 329 transitions, 3206 flow [2024-06-21 16:29:05,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3138, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3206, PETRI_PLACES=487, PETRI_TRANSITIONS=329} [2024-06-21 16:29:05,224 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 456 predicate places. [2024-06-21 16:29:05,224 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 329 transitions, 3206 flow [2024-06-21 16:29:05,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:05,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:05,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:05,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2024-06-21 16:29:05,224 INFO L420 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:29:05,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:05,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1276488704, now seen corresponding path program 36 times [2024-06-21 16:29:05,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:05,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723744284] [2024-06-21 16:29:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:05,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:06,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:06,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723744284] [2024-06-21 16:29:06,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723744284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:06,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:06,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:29:06,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595340556] [2024-06-21 16:29:06,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:06,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:29:06,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:06,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:29:06,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:29:06,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:29:06,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 329 transitions, 3206 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:06,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:06,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:29:06,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:07,408 INFO L124 PetriNetUnfolderBase]: 1081/2155 cut-off events. [2024-06-21 16:29:07,408 INFO L125 PetriNetUnfolderBase]: For 1253563/1253563 co-relation queries the response was YES. [2024-06-21 16:29:07,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25189 conditions, 2155 events. 1081/2155 cut-off events. For 1253563/1253563 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 13987 event pairs, 439 based on Foata normal form. 8/2162 useless extension candidates. Maximal degree in co-relation 24987. Up to 1868 conditions per place. [2024-06-21 16:29:07,444 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 306 selfloop transitions, 41 changer transitions 7/356 dead transitions. [2024-06-21 16:29:07,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 356 transitions, 4466 flow [2024-06-21 16:29:07,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:29:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:29:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 157 transitions. [2024-06-21 16:29:07,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37740384615384615 [2024-06-21 16:29:07,446 INFO L175 Difference]: Start difference. First operand has 487 places, 329 transitions, 3206 flow. Second operand 13 states and 157 transitions. [2024-06-21 16:29:07,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 356 transitions, 4466 flow [2024-06-21 16:29:12,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 356 transitions, 4368 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 16:29:12,459 INFO L231 Difference]: Finished difference. Result has 485 places, 327 transitions, 3186 flow [2024-06-21 16:29:12,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3112, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3186, PETRI_PLACES=485, PETRI_TRANSITIONS=327} [2024-06-21 16:29:12,459 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 454 predicate places. [2024-06-21 16:29:12,459 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 327 transitions, 3186 flow [2024-06-21 16:29:12,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:12,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:12,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:12,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2024-06-21 16:29:12,460 INFO L420 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:29:12,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:12,461 INFO L85 PathProgramCache]: Analyzing trace with hash 302488362, now seen corresponding path program 37 times [2024-06-21 16:29:12,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:12,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868431029] [2024-06-21 16:29:12,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:12,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:13,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:13,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868431029] [2024-06-21 16:29:13,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868431029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:13,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:13,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:29:13,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263348733] [2024-06-21 16:29:13,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:13,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:29:13,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:13,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:29:13,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:29:13,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:29:13,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 327 transitions, 3186 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:13,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:13,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:29:13,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:14,460 INFO L124 PetriNetUnfolderBase]: 1079/2153 cut-off events. [2024-06-21 16:29:14,460 INFO L125 PetriNetUnfolderBase]: For 1264815/1264815 co-relation queries the response was YES. [2024-06-21 16:29:14,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25170 conditions, 2153 events. 1079/2153 cut-off events. For 1264815/1264815 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 13983 event pairs, 441 based on Foata normal form. 10/2162 useless extension candidates. Maximal degree in co-relation 24969. Up to 1927 conditions per place. [2024-06-21 16:29:14,492 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 288 selfloop transitions, 47 changer transitions 11/348 dead transitions. [2024-06-21 16:29:14,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 348 transitions, 4036 flow [2024-06-21 16:29:14,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:29:14,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:29:14,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 147 transitions. [2024-06-21 16:29:14,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35336538461538464 [2024-06-21 16:29:14,494 INFO L175 Difference]: Start difference. First operand has 485 places, 327 transitions, 3186 flow. Second operand 13 states and 147 transitions. [2024-06-21 16:29:14,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 348 transitions, 4036 flow [2024-06-21 16:29:19,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 348 transitions, 3952 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 16:29:19,282 INFO L231 Difference]: Finished difference. Result has 484 places, 324 transitions, 3183 flow [2024-06-21 16:29:19,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3102, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3183, PETRI_PLACES=484, PETRI_TRANSITIONS=324} [2024-06-21 16:29:19,285 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 453 predicate places. [2024-06-21 16:29:19,285 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 324 transitions, 3183 flow [2024-06-21 16:29:19,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:19,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:19,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:19,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250 [2024-06-21 16:29:19,285 INFO L420 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:29:19,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:19,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1283168398, now seen corresponding path program 19 times [2024-06-21 16:29:19,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:19,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334475694] [2024-06-21 16:29:19,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:19,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:20,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:20,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334475694] [2024-06-21 16:29:20,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334475694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:20,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:20,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:29:20,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139506922] [2024-06-21 16:29:20,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:20,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:29:20,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:20,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:29:20,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:29:20,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:29:20,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 324 transitions, 3183 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:20,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:20,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:29:20,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:21,337 INFO L124 PetriNetUnfolderBase]: 1067/2133 cut-off events. [2024-06-21 16:29:21,338 INFO L125 PetriNetUnfolderBase]: For 1218583/1218583 co-relation queries the response was YES. [2024-06-21 16:29:21,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25005 conditions, 2133 events. 1067/2133 cut-off events. For 1218583/1218583 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 13817 event pairs, 445 based on Foata normal form. 8/2140 useless extension candidates. Maximal degree in co-relation 24805. Up to 1920 conditions per place. [2024-06-21 16:29:21,372 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 294 selfloop transitions, 37 changer transitions 12/345 dead transitions. [2024-06-21 16:29:21,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 345 transitions, 4009 flow [2024-06-21 16:29:21,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:29:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:29:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-06-21 16:29:21,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3723958333333333 [2024-06-21 16:29:21,373 INFO L175 Difference]: Start difference. First operand has 484 places, 324 transitions, 3183 flow. Second operand 12 states and 143 transitions. [2024-06-21 16:29:21,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 345 transitions, 4009 flow [2024-06-21 16:29:26,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 345 transitions, 3905 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 16:29:26,209 INFO L231 Difference]: Finished difference. Result has 481 places, 321 transitions, 3133 flow [2024-06-21 16:29:26,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3081, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3133, PETRI_PLACES=481, PETRI_TRANSITIONS=321} [2024-06-21 16:29:26,210 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 450 predicate places. [2024-06-21 16:29:26,210 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 321 transitions, 3133 flow [2024-06-21 16:29:26,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:26,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:26,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:26,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251 [2024-06-21 16:29:26,210 INFO L420 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:29:26,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:26,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1276493354, now seen corresponding path program 38 times [2024-06-21 16:29:26,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:26,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258371106] [2024-06-21 16:29:26,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:26,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:27,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:27,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258371106] [2024-06-21 16:29:27,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258371106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:27,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:27,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:29:27,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774003203] [2024-06-21 16:29:27,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:27,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:29:27,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:27,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:29:27,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:29:27,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:29:27,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 321 transitions, 3133 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:27,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:27,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:29:27,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:28,238 INFO L124 PetriNetUnfolderBase]: 1034/2066 cut-off events. [2024-06-21 16:29:28,239 INFO L125 PetriNetUnfolderBase]: For 1111298/1111298 co-relation queries the response was YES. [2024-06-21 16:29:28,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22758 conditions, 2066 events. 1034/2066 cut-off events. For 1111298/1111298 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13291 event pairs, 430 based on Foata normal form. 10/2075 useless extension candidates. Maximal degree in co-relation 22559. Up to 1846 conditions per place. [2024-06-21 16:29:28,272 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 290 selfloop transitions, 35 changer transitions 16/343 dead transitions. [2024-06-21 16:29:28,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 343 transitions, 3973 flow [2024-06-21 16:29:28,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:29:28,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:29:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 150 transitions. [2024-06-21 16:29:28,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3605769230769231 [2024-06-21 16:29:28,273 INFO L175 Difference]: Start difference. First operand has 481 places, 321 transitions, 3133 flow. Second operand 13 states and 150 transitions. [2024-06-21 16:29:28,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 343 transitions, 3973 flow [2024-06-21 16:29:32,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 343 transitions, 3895 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 16:29:32,746 INFO L231 Difference]: Finished difference. Result has 479 places, 315 transitions, 3077 flow [2024-06-21 16:29:32,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3055, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3077, PETRI_PLACES=479, PETRI_TRANSITIONS=315} [2024-06-21 16:29:32,746 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 448 predicate places. [2024-06-21 16:29:32,746 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 315 transitions, 3077 flow [2024-06-21 16:29:32,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:32,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:32,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:32,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252 [2024-06-21 16:29:32,747 INFO L420 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:29:32,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:32,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1306815650, now seen corresponding path program 39 times [2024-06-21 16:29:32,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:32,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421488729] [2024-06-21 16:29:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:32,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:33,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:33,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421488729] [2024-06-21 16:29:33,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421488729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:33,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:33,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:29:33,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587281897] [2024-06-21 16:29:33,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:33,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:29:33,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:33,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:29:33,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:29:33,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:29:33,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 315 transitions, 3077 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:33,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:33,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:29:33,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:34,599 INFO L124 PetriNetUnfolderBase]: 1019/2037 cut-off events. [2024-06-21 16:29:34,599 INFO L125 PetriNetUnfolderBase]: For 1071105/1071105 co-relation queries the response was YES. [2024-06-21 16:29:34,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22467 conditions, 2037 events. 1019/2037 cut-off events. For 1071105/1071105 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 13062 event pairs, 418 based on Foata normal form. 8/2044 useless extension candidates. Maximal degree in co-relation 22269. Up to 1833 conditions per place. [2024-06-21 16:29:34,631 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 279 selfloop transitions, 40 changer transitions 14/335 dead transitions. [2024-06-21 16:29:34,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 335 transitions, 3845 flow [2024-06-21 16:29:34,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:29:34,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:29:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 144 transitions. [2024-06-21 16:29:34,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34615384615384615 [2024-06-21 16:29:34,632 INFO L175 Difference]: Start difference. First operand has 479 places, 315 transitions, 3077 flow. Second operand 13 states and 144 transitions. [2024-06-21 16:29:34,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 335 transitions, 3845 flow [2024-06-21 16:29:39,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 335 transitions, 3743 flow, removed 7 selfloop flow, removed 15 redundant places. [2024-06-21 16:29:39,139 INFO L231 Difference]: Finished difference. Result has 469 places, 310 transitions, 3023 flow [2024-06-21 16:29:39,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2977, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3023, PETRI_PLACES=469, PETRI_TRANSITIONS=310} [2024-06-21 16:29:39,139 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 438 predicate places. [2024-06-21 16:29:39,139 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 310 transitions, 3023 flow [2024-06-21 16:29:39,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:39,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:39,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:39,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253 [2024-06-21 16:29:39,140 INFO L420 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:29:39,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:39,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1135997900, now seen corresponding path program 40 times [2024-06-21 16:29:39,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:39,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027934703] [2024-06-21 16:29:39,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:39,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:40,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:40,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027934703] [2024-06-21 16:29:40,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027934703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:40,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:40,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:29:40,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146506265] [2024-06-21 16:29:40,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:40,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:29:40,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:40,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:29:40,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:29:40,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:29:40,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 310 transitions, 3023 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:40,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:40,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:29:40,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:41,053 INFO L124 PetriNetUnfolderBase]: 1039/2077 cut-off events. [2024-06-21 16:29:41,053 INFO L125 PetriNetUnfolderBase]: For 1149428/1149428 co-relation queries the response was YES. [2024-06-21 16:29:41,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24016 conditions, 2077 events. 1039/2077 cut-off events. For 1149428/1149428 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13303 event pairs, 435 based on Foata normal form. 8/2084 useless extension candidates. Maximal degree in co-relation 23821. Up to 1712 conditions per place. [2024-06-21 16:29:41,087 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 271 selfloop transitions, 54 changer transitions 10/337 dead transitions. [2024-06-21 16:29:41,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 337 transitions, 4217 flow [2024-06-21 16:29:41,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:29:41,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:29:41,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 153 transitions. [2024-06-21 16:29:41,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36778846153846156 [2024-06-21 16:29:41,089 INFO L175 Difference]: Start difference. First operand has 469 places, 310 transitions, 3023 flow. Second operand 13 states and 153 transitions. [2024-06-21 16:29:41,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 337 transitions, 4217 flow [2024-06-21 16:29:44,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 337 transitions, 4107 flow, removed 15 selfloop flow, removed 13 redundant places. [2024-06-21 16:29:44,707 INFO L231 Difference]: Finished difference. Result has 461 places, 307 transitions, 3025 flow [2024-06-21 16:29:44,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2929, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3025, PETRI_PLACES=461, PETRI_TRANSITIONS=307} [2024-06-21 16:29:44,707 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 430 predicate places. [2024-06-21 16:29:44,708 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 307 transitions, 3025 flow [2024-06-21 16:29:44,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:44,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:44,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:44,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254 [2024-06-21 16:29:44,713 INFO L420 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:29:44,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:44,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1080188888, now seen corresponding path program 20 times [2024-06-21 16:29:44,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:44,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249279896] [2024-06-21 16:29:44,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:44,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:45,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:45,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249279896] [2024-06-21 16:29:45,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249279896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:45,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:45,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:29:45,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114219302] [2024-06-21 16:29:45,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:45,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:29:45,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:45,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:29:45,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:29:45,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:29:45,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 307 transitions, 3025 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:45,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:45,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:29:45,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:46,471 INFO L124 PetriNetUnfolderBase]: 1028/2052 cut-off events. [2024-06-21 16:29:46,471 INFO L125 PetriNetUnfolderBase]: For 1050634/1050634 co-relation queries the response was YES. [2024-06-21 16:29:46,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23900 conditions, 2052 events. 1028/2052 cut-off events. For 1050634/1050634 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13116 event pairs, 448 based on Foata normal form. 2/2053 useless extension candidates. Maximal degree in co-relation 23709. Up to 1756 conditions per place. [2024-06-21 16:29:46,503 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 285 selfloop transitions, 40 changer transitions 0/327 dead transitions. [2024-06-21 16:29:46,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 327 transitions, 4095 flow [2024-06-21 16:29:46,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:29:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:29:46,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-21 16:29:46,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3645833333333333 [2024-06-21 16:29:46,507 INFO L175 Difference]: Start difference. First operand has 461 places, 307 transitions, 3025 flow. Second operand 12 states and 140 transitions. [2024-06-21 16:29:46,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 327 transitions, 4095 flow [2024-06-21 16:29:50,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 327 transitions, 3987 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 16:29:50,766 INFO L231 Difference]: Finished difference. Result has 457 places, 309 transitions, 3085 flow [2024-06-21 16:29:50,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2923, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3085, PETRI_PLACES=457, PETRI_TRANSITIONS=309} [2024-06-21 16:29:50,768 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 426 predicate places. [2024-06-21 16:29:50,768 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 309 transitions, 3085 flow [2024-06-21 16:29:50,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:50,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:50,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:50,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255 [2024-06-21 16:29:50,771 INFO L420 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:29:50,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:50,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1653077080, now seen corresponding path program 21 times [2024-06-21 16:29:50,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:50,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598508212] [2024-06-21 16:29:50,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:50,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:51,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:51,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598508212] [2024-06-21 16:29:51,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598508212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:51,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:51,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:29:51,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518134287] [2024-06-21 16:29:51,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:51,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:29:51,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:29:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:29:52,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:29:52,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 309 transitions, 3085 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:52,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:52,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:29:52,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:52,920 INFO L124 PetriNetUnfolderBase]: 1032/2060 cut-off events. [2024-06-21 16:29:52,921 INFO L125 PetriNetUnfolderBase]: For 1023824/1023824 co-relation queries the response was YES. [2024-06-21 16:29:52,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23814 conditions, 2060 events. 1032/2060 cut-off events. For 1023824/1023824 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13175 event pairs, 448 based on Foata normal form. 2/2061 useless extension candidates. Maximal degree in co-relation 23625. Up to 1889 conditions per place. [2024-06-21 16:29:52,952 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 291 selfloop transitions, 35 changer transitions 0/328 dead transitions. [2024-06-21 16:29:52,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 328 transitions, 3825 flow [2024-06-21 16:29:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:29:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:29:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 16:29:52,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619791666666667 [2024-06-21 16:29:52,953 INFO L175 Difference]: Start difference. First operand has 457 places, 309 transitions, 3085 flow. Second operand 12 states and 139 transitions. [2024-06-21 16:29:52,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 328 transitions, 3825 flow [2024-06-21 16:29:57,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 328 transitions, 3729 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 16:29:57,183 INFO L231 Difference]: Finished difference. Result has 461 places, 310 transitions, 3105 flow [2024-06-21 16:29:57,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2995, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3105, PETRI_PLACES=461, PETRI_TRANSITIONS=310} [2024-06-21 16:29:57,184 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 430 predicate places. [2024-06-21 16:29:57,184 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 310 transitions, 3105 flow [2024-06-21 16:29:57,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:57,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:57,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:57,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256 [2024-06-21 16:29:57,185 INFO L420 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:29:57,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:57,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1534683244, now seen corresponding path program 22 times [2024-06-21 16:29:57,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:57,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203984035] [2024-06-21 16:29:57,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:57,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:58,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:58,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:58,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203984035] [2024-06-21 16:29:58,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203984035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:58,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:58,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:29:58,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337208769] [2024-06-21 16:29:58,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:58,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:29:58,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:58,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:29:58,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:29:58,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:29:58,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 310 transitions, 3105 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:58,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:58,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:29:58,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:58,909 INFO L124 PetriNetUnfolderBase]: 1036/2068 cut-off events. [2024-06-21 16:29:58,910 INFO L125 PetriNetUnfolderBase]: For 1037138/1037138 co-relation queries the response was YES. [2024-06-21 16:29:58,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23955 conditions, 2068 events. 1036/2068 cut-off events. For 1037138/1037138 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 13264 event pairs, 448 based on Foata normal form. 2/2069 useless extension candidates. Maximal degree in co-relation 23764. Up to 1983 conditions per place. [2024-06-21 16:29:58,941 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 302 selfloop transitions, 24 changer transitions 0/328 dead transitions. [2024-06-21 16:29:58,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 328 transitions, 3841 flow [2024-06-21 16:29:58,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:29:58,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:29:58,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-06-21 16:29:58,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3411458333333333 [2024-06-21 16:29:58,942 INFO L175 Difference]: Start difference. First operand has 461 places, 310 transitions, 3105 flow. Second operand 12 states and 131 transitions. [2024-06-21 16:29:58,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 328 transitions, 3841 flow [2024-06-21 16:30:02,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 328 transitions, 3743 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-21 16:30:02,626 INFO L231 Difference]: Finished difference. Result has 463 places, 311 transitions, 3101 flow [2024-06-21 16:30:02,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3007, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3101, PETRI_PLACES=463, PETRI_TRANSITIONS=311} [2024-06-21 16:30:02,626 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 432 predicate places. [2024-06-21 16:30:02,626 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 311 transitions, 3101 flow [2024-06-21 16:30:02,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:02,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:02,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:02,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257 [2024-06-21 16:30:02,627 INFO L420 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:30:02,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:02,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1513145308, now seen corresponding path program 23 times [2024-06-21 16:30:02,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:02,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440166767] [2024-06-21 16:30:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:02,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:03,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:03,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440166767] [2024-06-21 16:30:03,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440166767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:03,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:03,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:30:03,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059355788] [2024-06-21 16:30:03,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:03,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:30:03,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:03,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:30:03,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:30:03,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:30:03,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 311 transitions, 3101 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:03,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:03,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:30:03,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:04,472 INFO L124 PetriNetUnfolderBase]: 1040/2076 cut-off events. [2024-06-21 16:30:04,472 INFO L125 PetriNetUnfolderBase]: For 1051245/1051245 co-relation queries the response was YES. [2024-06-21 16:30:04,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24066 conditions, 2076 events. 1040/2076 cut-off events. For 1051245/1051245 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13325 event pairs, 450 based on Foata normal form. 2/2077 useless extension candidates. Maximal degree in co-relation 23874. Up to 1883 conditions per place. [2024-06-21 16:30:04,506 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 292 selfloop transitions, 36 changer transitions 0/330 dead transitions. [2024-06-21 16:30:04,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 330 transitions, 3839 flow [2024-06-21 16:30:04,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:30:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:30:04,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 16:30:04,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3671875 [2024-06-21 16:30:04,507 INFO L175 Difference]: Start difference. First operand has 463 places, 311 transitions, 3101 flow. Second operand 12 states and 141 transitions. [2024-06-21 16:30:04,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 330 transitions, 3839 flow [2024-06-21 16:30:08,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 330 transitions, 3755 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-21 16:30:08,645 INFO L231 Difference]: Finished difference. Result has 465 places, 312 transitions, 3131 flow [2024-06-21 16:30:08,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3017, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3131, PETRI_PLACES=465, PETRI_TRANSITIONS=312} [2024-06-21 16:30:08,645 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 434 predicate places. [2024-06-21 16:30:08,645 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 312 transitions, 3131 flow [2024-06-21 16:30:08,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:08,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:08,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:08,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258 [2024-06-21 16:30:08,646 INFO L420 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:30:08,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:08,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1276337942, now seen corresponding path program 41 times [2024-06-21 16:30:08,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:08,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904994019] [2024-06-21 16:30:08,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:08,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:09,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:09,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904994019] [2024-06-21 16:30:09,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904994019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:09,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:09,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:30:09,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306832115] [2024-06-21 16:30:09,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:09,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:30:09,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:09,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:30:09,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:30:09,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:30:09,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 312 transitions, 3131 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:09,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:09,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:30:09,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:10,694 INFO L124 PetriNetUnfolderBase]: 1056/2112 cut-off events. [2024-06-21 16:30:10,695 INFO L125 PetriNetUnfolderBase]: For 1154369/1154369 co-relation queries the response was YES. [2024-06-21 16:30:10,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24381 conditions, 2112 events. 1056/2112 cut-off events. For 1154369/1154369 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 13625 event pairs, 450 based on Foata normal form. 10/2121 useless extension candidates. Maximal degree in co-relation 24188. Up to 1868 conditions per place. [2024-06-21 16:30:10,731 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 267 selfloop transitions, 52 changer transitions 14/335 dead transitions. [2024-06-21 16:30:10,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 335 transitions, 3949 flow [2024-06-21 16:30:10,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:30:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:30:10,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 157 transitions. [2024-06-21 16:30:10,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35044642857142855 [2024-06-21 16:30:10,732 INFO L175 Difference]: Start difference. First operand has 465 places, 312 transitions, 3131 flow. Second operand 14 states and 157 transitions. [2024-06-21 16:30:10,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 335 transitions, 3949 flow [2024-06-21 16:30:14,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 335 transitions, 3847 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-21 16:30:14,892 INFO L231 Difference]: Finished difference. Result has 469 places, 306 transitions, 3101 flow [2024-06-21 16:30:14,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3101, PETRI_PLACES=469, PETRI_TRANSITIONS=306} [2024-06-21 16:30:14,893 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 438 predicate places. [2024-06-21 16:30:14,893 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 306 transitions, 3101 flow [2024-06-21 16:30:14,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:14,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:14,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:14,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259 [2024-06-21 16:30:14,893 INFO L420 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:30:14,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:14,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1280801942, now seen corresponding path program 42 times [2024-06-21 16:30:14,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:14,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993848129] [2024-06-21 16:30:14,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:14,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:15,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:15,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993848129] [2024-06-21 16:30:15,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993848129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:15,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:15,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:30:15,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931057017] [2024-06-21 16:30:15,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:15,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:30:15,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:15,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:30:15,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:30:15,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:30:15,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 306 transitions, 3101 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:15,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:15,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:30:15,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:16,686 INFO L124 PetriNetUnfolderBase]: 1036/2080 cut-off events. [2024-06-21 16:30:16,686 INFO L125 PetriNetUnfolderBase]: For 1144549/1144549 co-relation queries the response was YES. [2024-06-21 16:30:16,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24254 conditions, 2080 events. 1036/2080 cut-off events. For 1144549/1144549 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13444 event pairs, 436 based on Foata normal form. 8/2087 useless extension candidates. Maximal degree in co-relation 24060. Up to 1834 conditions per place. [2024-06-21 16:30:16,721 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 253 selfloop transitions, 59 changer transitions 13/327 dead transitions. [2024-06-21 16:30:16,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 327 transitions, 3853 flow [2024-06-21 16:30:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:30:16,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:30:16,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 146 transitions. [2024-06-21 16:30:16,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35096153846153844 [2024-06-21 16:30:16,722 INFO L175 Difference]: Start difference. First operand has 469 places, 306 transitions, 3101 flow. Second operand 13 states and 146 transitions. [2024-06-21 16:30:16,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 327 transitions, 3853 flow [2024-06-21 16:30:21,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 327 transitions, 3737 flow, removed 6 selfloop flow, removed 14 redundant places. [2024-06-21 16:30:21,196 INFO L231 Difference]: Finished difference. Result has 464 places, 302 transitions, 3073 flow [2024-06-21 16:30:21,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2987, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3073, PETRI_PLACES=464, PETRI_TRANSITIONS=302} [2024-06-21 16:30:21,196 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 433 predicate places. [2024-06-21 16:30:21,196 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 302 transitions, 3073 flow [2024-06-21 16:30:21,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:21,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:21,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:21,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260 [2024-06-21 16:30:21,197 INFO L420 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:30:21,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:21,197 INFO L85 PathProgramCache]: Analyzing trace with hash -894408856, now seen corresponding path program 24 times [2024-06-21 16:30:21,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:21,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248469962] [2024-06-21 16:30:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:21,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:22,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:22,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248469962] [2024-06-21 16:30:22,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248469962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:22,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:22,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:30:22,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746135081] [2024-06-21 16:30:22,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:22,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:30:22,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:22,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:30:22,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:30:22,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:30:22,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 302 transitions, 3073 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:22,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:22,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:30:22,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:23,318 INFO L124 PetriNetUnfolderBase]: 1020/2044 cut-off events. [2024-06-21 16:30:23,318 INFO L125 PetriNetUnfolderBase]: For 1051509/1051509 co-relation queries the response was YES. [2024-06-21 16:30:23,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23844 conditions, 2044 events. 1020/2044 cut-off events. For 1051509/1051509 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13120 event pairs, 448 based on Foata normal form. 2/2045 useless extension candidates. Maximal degree in co-relation 23652. Up to 1876 conditions per place. [2024-06-21 16:30:23,349 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 282 selfloop transitions, 36 changer transitions 0/320 dead transitions. [2024-06-21 16:30:23,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 320 transitions, 3791 flow [2024-06-21 16:30:23,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:30:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:30:23,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-06-21 16:30:23,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-21 16:30:23,350 INFO L175 Difference]: Start difference. First operand has 464 places, 302 transitions, 3073 flow. Second operand 12 states and 136 transitions. [2024-06-21 16:30:23,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 320 transitions, 3791 flow [2024-06-21 16:30:27,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 320 transitions, 3661 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 16:30:27,396 INFO L231 Difference]: Finished difference. Result has 457 places, 303 transitions, 3059 flow [2024-06-21 16:30:27,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2943, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3059, PETRI_PLACES=457, PETRI_TRANSITIONS=303} [2024-06-21 16:30:27,396 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 426 predicate places. [2024-06-21 16:30:27,396 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 303 transitions, 3059 flow [2024-06-21 16:30:27,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:27,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:27,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:27,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261 [2024-06-21 16:30:27,397 INFO L420 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:30:27,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:27,397 INFO L85 PathProgramCache]: Analyzing trace with hash -894120556, now seen corresponding path program 25 times [2024-06-21 16:30:27,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:27,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469239330] [2024-06-21 16:30:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:27,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:28,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:28,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469239330] [2024-06-21 16:30:28,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469239330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:28,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:28,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:30:28,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334358527] [2024-06-21 16:30:28,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:28,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:30:28,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:28,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:30:28,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:30:28,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:30:28,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 303 transitions, 3059 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:28,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:28,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:30:28,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:29,133 INFO L124 PetriNetUnfolderBase]: 1024/2052 cut-off events. [2024-06-21 16:30:29,133 INFO L125 PetriNetUnfolderBase]: For 1025555/1025555 co-relation queries the response was YES. [2024-06-21 16:30:29,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23595 conditions, 2052 events. 1024/2052 cut-off events. For 1025555/1025555 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13160 event pairs, 450 based on Foata normal form. 2/2053 useless extension candidates. Maximal degree in co-relation 23406. Up to 1845 conditions per place. [2024-06-21 16:30:29,164 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 282 selfloop transitions, 38 changer transitions 0/322 dead transitions. [2024-06-21 16:30:29,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 322 transitions, 4081 flow [2024-06-21 16:30:29,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:30:29,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:30:29,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 16:30:29,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619791666666667 [2024-06-21 16:30:29,165 INFO L175 Difference]: Start difference. First operand has 457 places, 303 transitions, 3059 flow. Second operand 12 states and 139 transitions. [2024-06-21 16:30:29,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 322 transitions, 4081 flow [2024-06-21 16:30:32,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 322 transitions, 3977 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-21 16:30:32,480 INFO L231 Difference]: Finished difference. Result has 459 places, 304 transitions, 3075 flow [2024-06-21 16:30:32,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2955, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3075, PETRI_PLACES=459, PETRI_TRANSITIONS=304} [2024-06-21 16:30:32,480 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 428 predicate places. [2024-06-21 16:30:32,480 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 304 transitions, 3075 flow [2024-06-21 16:30:32,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:32,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:32,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:32,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262 [2024-06-21 16:30:32,481 INFO L420 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:30:32,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:32,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1136113220, now seen corresponding path program 43 times [2024-06-21 16:30:32,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:32,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120646534] [2024-06-21 16:30:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:32,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:33,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:33,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120646534] [2024-06-21 16:30:33,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120646534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:33,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:33,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:30:33,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881338067] [2024-06-21 16:30:33,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:33,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:30:33,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:33,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:30:33,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:30:33,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:30:33,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 304 transitions, 3075 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:33,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:33,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:30:33,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:34,271 INFO L124 PetriNetUnfolderBase]: 1036/2080 cut-off events. [2024-06-21 16:30:34,271 INFO L125 PetriNetUnfolderBase]: For 1103106/1103106 co-relation queries the response was YES. [2024-06-21 16:30:34,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23786 conditions, 2080 events. 1036/2080 cut-off events. For 1103106/1103106 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13397 event pairs, 448 based on Foata normal form. 8/2087 useless extension candidates. Maximal degree in co-relation 23596. Up to 1864 conditions per place. [2024-06-21 16:30:34,305 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 265 selfloop transitions, 44 changer transitions 14/325 dead transitions. [2024-06-21 16:30:34,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 325 transitions, 3819 flow [2024-06-21 16:30:34,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:30:34,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:30:34,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 145 transitions. [2024-06-21 16:30:34,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3485576923076923 [2024-06-21 16:30:34,306 INFO L175 Difference]: Start difference. First operand has 459 places, 304 transitions, 3075 flow. Second operand 13 states and 145 transitions. [2024-06-21 16:30:34,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 325 transitions, 3819 flow [2024-06-21 16:30:37,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 325 transitions, 3699 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-21 16:30:37,932 INFO L231 Difference]: Finished difference. Result has 462 places, 298 transitions, 2999 flow [2024-06-21 16:30:37,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2955, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2999, PETRI_PLACES=462, PETRI_TRANSITIONS=298} [2024-06-21 16:30:37,933 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 431 predicate places. [2024-06-21 16:30:37,933 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 298 transitions, 2999 flow [2024-06-21 16:30:37,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:37,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:37,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:37,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263 [2024-06-21 16:30:37,933 INFO L420 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:30:37,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:37,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1264317538, now seen corresponding path program 26 times [2024-06-21 16:30:37,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:37,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099046643] [2024-06-21 16:30:37,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:37,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:39,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:39,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099046643] [2024-06-21 16:30:39,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099046643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:39,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:39,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:30:39,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241437903] [2024-06-21 16:30:39,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:39,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:30:39,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:39,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:30:39,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:30:39,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:30:39,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 298 transitions, 2999 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:39,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:39,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:30:39,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:40,040 INFO L124 PetriNetUnfolderBase]: 1019/2045 cut-off events. [2024-06-21 16:30:40,041 INFO L125 PetriNetUnfolderBase]: For 1089446/1089446 co-relation queries the response was YES. [2024-06-21 16:30:40,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23349 conditions, 2045 events. 1019/2045 cut-off events. For 1089446/1089446 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13132 event pairs, 451 based on Foata normal form. 8/2052 useless extension candidates. Maximal degree in co-relation 23158. Up to 1859 conditions per place. [2024-06-21 16:30:40,073 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 273 selfloop transitions, 31 changer transitions 12/318 dead transitions. [2024-06-21 16:30:40,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 318 transitions, 3723 flow [2024-06-21 16:30:40,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:30:40,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:30:40,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-21 16:30:40,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3645833333333333 [2024-06-21 16:30:40,074 INFO L175 Difference]: Start difference. First operand has 462 places, 298 transitions, 2999 flow. Second operand 12 states and 140 transitions. [2024-06-21 16:30:40,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 318 transitions, 3723 flow [2024-06-21 16:30:44,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 318 transitions, 3585 flow, removed 25 selfloop flow, removed 15 redundant places. [2024-06-21 16:30:44,089 INFO L231 Difference]: Finished difference. Result has 451 places, 294 transitions, 2897 flow [2024-06-21 16:30:44,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2863, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2897, PETRI_PLACES=451, PETRI_TRANSITIONS=294} [2024-06-21 16:30:44,090 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 420 predicate places. [2024-06-21 16:30:44,090 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 294 transitions, 2897 flow [2024-06-21 16:30:44,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:44,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:44,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:44,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264 [2024-06-21 16:30:44,090 INFO L420 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:30:44,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:44,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1270992582, now seen corresponding path program 44 times [2024-06-21 16:30:44,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:44,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595223811] [2024-06-21 16:30:44,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:44,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:45,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:45,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595223811] [2024-06-21 16:30:45,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595223811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:45,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:45,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:30:45,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322828433] [2024-06-21 16:30:45,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:45,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:30:45,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:45,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:30:45,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:30:45,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:30:45,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 294 transitions, 2897 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:45,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:45,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:30:45,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:45,956 INFO L124 PetriNetUnfolderBase]: 1015/2037 cut-off events. [2024-06-21 16:30:45,956 INFO L125 PetriNetUnfolderBase]: For 1044162/1044162 co-relation queries the response was YES. [2024-06-21 16:30:45,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22774 conditions, 2037 events. 1015/2037 cut-off events. For 1044162/1044162 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13062 event pairs, 453 based on Foata normal form. 10/2046 useless extension candidates. Maximal degree in co-relation 22588. Up to 1844 conditions per place. [2024-06-21 16:30:45,987 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 270 selfloop transitions, 33 changer transitions 11/316 dead transitions. [2024-06-21 16:30:45,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 316 transitions, 3665 flow [2024-06-21 16:30:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:30:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:30:45,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 148 transitions. [2024-06-21 16:30:45,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3557692307692308 [2024-06-21 16:30:45,988 INFO L175 Difference]: Start difference. First operand has 451 places, 294 transitions, 2897 flow. Second operand 13 states and 148 transitions. [2024-06-21 16:30:45,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 316 transitions, 3665 flow [2024-06-21 16:30:50,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 316 transitions, 3595 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 16:30:50,168 INFO L231 Difference]: Finished difference. Result has 448 places, 291 transitions, 2878 flow [2024-06-21 16:30:50,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2827, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2878, PETRI_PLACES=448, PETRI_TRANSITIONS=291} [2024-06-21 16:30:50,169 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 417 predicate places. [2024-06-21 16:30:50,169 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 291 transitions, 2878 flow [2024-06-21 16:30:50,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:50,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:50,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:50,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265 [2024-06-21 16:30:50,169 INFO L420 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:30:50,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:50,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1130777160, now seen corresponding path program 45 times [2024-06-21 16:30:50,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:50,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612122252] [2024-06-21 16:30:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:50,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:51,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:51,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612122252] [2024-06-21 16:30:51,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612122252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:51,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:51,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:30:51,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959422920] [2024-06-21 16:30:51,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:51,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:30:51,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:51,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:30:51,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:30:51,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:30:51,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 291 transitions, 2878 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:51,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:51,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:30:51,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:52,276 INFO L124 PetriNetUnfolderBase]: 1003/2017 cut-off events. [2024-06-21 16:30:52,277 INFO L125 PetriNetUnfolderBase]: For 1008228/1008228 co-relation queries the response was YES. [2024-06-21 16:30:52,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22543 conditions, 2017 events. 1003/2017 cut-off events. For 1008228/1008228 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12949 event pairs, 451 based on Foata normal form. 8/2024 useless extension candidates. Maximal degree in co-relation 22358. Up to 1834 conditions per place. [2024-06-21 16:30:52,307 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 267 selfloop transitions, 29 changer transitions 14/312 dead transitions. [2024-06-21 16:30:52,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 312 transitions, 3596 flow [2024-06-21 16:30:52,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:30:52,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:30:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 145 transitions. [2024-06-21 16:30:52,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3485576923076923 [2024-06-21 16:30:52,309 INFO L175 Difference]: Start difference. First operand has 448 places, 291 transitions, 2878 flow. Second operand 13 states and 145 transitions. [2024-06-21 16:30:52,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 312 transitions, 3596 flow [2024-06-21 16:30:56,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 312 transitions, 3520 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 16:30:56,205 INFO L231 Difference]: Finished difference. Result has 446 places, 286 transitions, 2820 flow [2024-06-21 16:30:56,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2804, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2820, PETRI_PLACES=446, PETRI_TRANSITIONS=286} [2024-06-21 16:30:56,206 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 415 predicate places. [2024-06-21 16:30:56,206 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 286 transitions, 2820 flow [2024-06-21 16:30:56,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:56,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:56,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:56,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266 [2024-06-21 16:30:56,206 INFO L420 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:30:56,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:56,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1888002156, now seen corresponding path program 27 times [2024-06-21 16:30:56,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:56,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616995521] [2024-06-21 16:30:56,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:56,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:57,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:57,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616995521] [2024-06-21 16:30:57,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616995521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:57,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:57,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:30:57,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4878097] [2024-06-21 16:30:57,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:57,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:30:57,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:57,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:30:57,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:30:57,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:30:57,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 286 transitions, 2820 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:57,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:57,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:30:57,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:58,508 INFO L124 PetriNetUnfolderBase]: 994/1998 cut-off events. [2024-06-21 16:30:58,508 INFO L125 PetriNetUnfolderBase]: For 992216/992216 co-relation queries the response was YES. [2024-06-21 16:30:58,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22322 conditions, 1998 events. 994/1998 cut-off events. For 992216/992216 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12764 event pairs, 453 based on Foata normal form. 8/2005 useless extension candidates. Maximal degree in co-relation 22138. Up to 1856 conditions per place. [2024-06-21 16:30:58,537 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 267 selfloop transitions, 25 changer transitions 12/306 dead transitions. [2024-06-21 16:30:58,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 306 transitions, 3554 flow [2024-06-21 16:30:58,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:30:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:30:58,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-21 16:30:58,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3515625 [2024-06-21 16:30:58,539 INFO L175 Difference]: Start difference. First operand has 446 places, 286 transitions, 2820 flow. Second operand 12 states and 135 transitions. [2024-06-21 16:30:58,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 306 transitions, 3554 flow [2024-06-21 16:31:02,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 306 transitions, 3466 flow, removed 7 selfloop flow, removed 16 redundant places. [2024-06-21 16:31:02,612 INFO L231 Difference]: Finished difference. Result has 435 places, 283 transitions, 2757 flow [2024-06-21 16:31:02,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2734, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2757, PETRI_PLACES=435, PETRI_TRANSITIONS=283} [2024-06-21 16:31:02,612 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 404 predicate places. [2024-06-21 16:31:02,613 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 283 transitions, 2757 flow [2024-06-21 16:31:02,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:02,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:02,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:02,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267 [2024-06-21 16:31:02,613 INFO L420 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:31:02,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:02,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1694825304, now seen corresponding path program 28 times [2024-06-21 16:31:02,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:02,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660481186] [2024-06-21 16:31:02,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:02,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:03,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:03,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660481186] [2024-06-21 16:31:03,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660481186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:03,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:03,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:31:03,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313262705] [2024-06-21 16:31:03,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:03,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:31:03,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:03,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:31:03,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:31:03,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:31:03,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 283 transitions, 2757 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:03,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:03,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:31:03,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:04,382 INFO L124 PetriNetUnfolderBase]: 976/1960 cut-off events. [2024-06-21 16:31:04,382 INFO L125 PetriNetUnfolderBase]: For 899233/899233 co-relation queries the response was YES. [2024-06-21 16:31:04,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21735 conditions, 1960 events. 976/1960 cut-off events. For 899233/899233 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12461 event pairs, 445 based on Foata normal form. 2/1961 useless extension candidates. Maximal degree in co-relation 21554. Up to 1887 conditions per place. [2024-06-21 16:31:04,411 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 269 selfloop transitions, 29 changer transitions 0/300 dead transitions. [2024-06-21 16:31:04,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 300 transitions, 3437 flow [2024-06-21 16:31:04,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:31:04,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:31:04,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 129 transitions. [2024-06-21 16:31:04,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3359375 [2024-06-21 16:31:04,412 INFO L175 Difference]: Start difference. First operand has 435 places, 283 transitions, 2757 flow. Second operand 12 states and 129 transitions. [2024-06-21 16:31:04,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 300 transitions, 3437 flow [2024-06-21 16:31:08,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 300 transitions, 3383 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 16:31:08,133 INFO L231 Difference]: Finished difference. Result has 432 places, 284 transitions, 2810 flow [2024-06-21 16:31:08,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2703, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2810, PETRI_PLACES=432, PETRI_TRANSITIONS=284} [2024-06-21 16:31:08,134 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 401 predicate places. [2024-06-21 16:31:08,134 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 284 transitions, 2810 flow [2024-06-21 16:31:08,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:08,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:08,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:08,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268 [2024-06-21 16:31:08,134 INFO L420 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:31:08,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:08,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1304994634, now seen corresponding path program 29 times [2024-06-21 16:31:08,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:08,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303114162] [2024-06-21 16:31:08,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:08,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:09,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:09,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303114162] [2024-06-21 16:31:09,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303114162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:09,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:09,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 16:31:09,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853883461] [2024-06-21 16:31:09,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:09,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 16:31:09,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:09,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 16:31:09,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-06-21 16:31:09,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 16:31:09,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 284 transitions, 2810 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:09,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:09,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 16:31:09,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:09,983 INFO L124 PetriNetUnfolderBase]: 980/1968 cut-off events. [2024-06-21 16:31:09,983 INFO L125 PetriNetUnfolderBase]: For 887455/887455 co-relation queries the response was YES. [2024-06-21 16:31:10,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21768 conditions, 1968 events. 980/1968 cut-off events. For 887455/887455 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12524 event pairs, 455 based on Foata normal form. 2/1969 useless extension candidates. Maximal degree in co-relation 21588. Up to 1891 conditions per place. [2024-06-21 16:31:10,013 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 278 selfloop transitions, 22 changer transitions 0/302 dead transitions. [2024-06-21 16:31:10,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 302 transitions, 3498 flow [2024-06-21 16:31:10,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:31:10,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:31:10,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-06-21 16:31:10,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3411458333333333 [2024-06-21 16:31:10,014 INFO L175 Difference]: Start difference. First operand has 432 places, 284 transitions, 2810 flow. Second operand 12 states and 131 transitions. [2024-06-21 16:31:10,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 302 transitions, 3498 flow [2024-06-21 16:31:13,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 302 transitions, 3403 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-21 16:31:13,361 INFO L231 Difference]: Finished difference. Result has 434 places, 285 transitions, 2809 flow [2024-06-21 16:31:13,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2715, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2809, PETRI_PLACES=434, PETRI_TRANSITIONS=285} [2024-06-21 16:31:13,362 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 403 predicate places. [2024-06-21 16:31:13,362 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 285 transitions, 2809 flow [2024-06-21 16:31:13,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:13,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:13,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:13,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269 [2024-06-21 16:31:13,362 INFO L420 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:31:13,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:13,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1831669902, now seen corresponding path program 30 times [2024-06-21 16:31:13,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:13,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134252274] [2024-06-21 16:31:13,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:13,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15