./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix034_pso.opt_tso.opt.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/mix034_pso.opt_tso.opt.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/mix034_pso.opt_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix034_pso.opt_tso.opt.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 16:44:45,794 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:44:45,849 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:44:45,854 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:44:45,854 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:44:45,887 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:44:45,888 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:44:45,888 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:44:45,889 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:44:45,894 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:44:45,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:44:45,895 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:44:45,896 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:44:45,897 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:44:45,898 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:44:45,898 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:44:45,898 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:44:45,898 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:44:45,899 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:44:45,899 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:44:45,899 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:44:45,900 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:44:45,900 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:44:45,900 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:44:45,900 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:44:45,901 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:44:45,901 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:44:45,901 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:44:45,902 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:44:45,902 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:44:45,903 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:44:45,903 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:44:45,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:44:45,904 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:44:45,904 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:44:45,904 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:44:45,905 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:44:45,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:44:45,905 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:44:45,905 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:44:45,905 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:44:45,906 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:44:45,906 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:44:45,906 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:44:46,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:44:46,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:44:46,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:44:46,162 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:44:46,163 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:44:46,164 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix034_pso.opt_tso.opt.i [2024-06-21 16:44:47,272 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:44:47,487 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:44:47,488 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix034_pso.opt_tso.opt.i [2024-06-21 16:44:47,501 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96a587a50/7a00184fa3fc46b4b40fc81abe45f368/FLAG4aa9999be [2024-06-21 16:44:47,528 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96a587a50/7a00184fa3fc46b4b40fc81abe45f368 [2024-06-21 16:44:47,534 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:44:47,550 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:44:47,551 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix034_pso.opt_tso.opt.yml/witness.yml [2024-06-21 16:44:47,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:44:47,678 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:44:47,679 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:44:47,679 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:44:47,685 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:44:47,685 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:44:47" (1/2) ... [2024-06-21 16:44:47,687 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722edbb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:44:47, skipping insertion in model container [2024-06-21 16:44:47,687 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:44:47" (1/2) ... [2024-06-21 16:44:47,689 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4a532c1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:44:47, skipping insertion in model container [2024-06-21 16:44:47,689 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:44:47" (2/2) ... [2024-06-21 16:44:47,689 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722edbb6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:44:47, skipping insertion in model container [2024-06-21 16:44:47,689 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:44:47" (2/2) ... [2024-06-21 16:44:47,690 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:44:47,748 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:44:47,750 INFO L97 edCorrectnessWitness]: Location invariant before [L816-L816] ((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-21 16:44:47,750 INFO L97 edCorrectnessWitness]: Location invariant before [L817-L817] ((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-21 16:44:47,750 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:44:47,750 INFO L106 edCorrectnessWitness]: ghost_update [L814-L814] multithreaded = 1; [2024-06-21 16:44:47,790 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:44:48,109 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:44:48,121 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:44:48,222 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:44:48,258 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:44:48,260 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:44:48 WrapperNode [2024-06-21 16:44:48,260 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:44:48,262 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:44:48,262 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:44:48,262 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:44:48,268 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:44:48" (1/1) ... [2024-06-21 16:44:48,301 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:44:48" (1/1) ... [2024-06-21 16:44:48,337 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 121 [2024-06-21 16:44:48,337 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:44:48,338 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:44:48,338 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:44:48,338 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:44:48,351 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:44:48" (1/1) ... [2024-06-21 16:44:48,352 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:44:48" (1/1) ... [2024-06-21 16:44:48,368 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:44:48" (1/1) ... [2024-06-21 16:44:48,387 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 16:44:48,389 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:44:48" (1/1) ... [2024-06-21 16:44:48,390 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:44:48" (1/1) ... [2024-06-21 16:44:48,403 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:44:48" (1/1) ... [2024-06-21 16:44:48,414 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:44:48" (1/1) ... [2024-06-21 16:44:48,415 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:44:48" (1/1) ... [2024-06-21 16:44:48,416 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:44:48" (1/1) ... [2024-06-21 16:44:48,426 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:44:48,427 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:44:48,427 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:44:48,427 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:44:48,428 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:44:48" (1/1) ... [2024-06-21 16:44:48,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:44:48,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:44:48,457 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 16:44:48,485 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 16:44:48,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:44:48,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:44:48,502 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:44:48,502 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:44:48,502 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:44:48,502 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:44:48,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:44:48,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:44:48,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:44:48,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:44:48,507 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 16:44:48,625 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:44:48,627 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:44:48,937 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:44:48,937 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:44:49,102 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:44:49,102 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:44:49,105 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:44:49 BoogieIcfgContainer [2024-06-21 16:44:49,105 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:44:49,109 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:44:49,109 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:44:49,112 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:44:49,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:44:47" (1/4) ... [2024-06-21 16:44:49,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13286e0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:44:49, skipping insertion in model container [2024-06-21 16:44:49,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:44:47" (2/4) ... [2024-06-21 16:44:49,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13286e0f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:44:49, skipping insertion in model container [2024-06-21 16:44:49,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:44:48" (3/4) ... [2024-06-21 16:44:49,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13286e0f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:44:49, skipping insertion in model container [2024-06-21 16:44:49,119 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:44:49" (4/4) ... [2024-06-21 16:44:49,120 INFO L112 eAbstractionObserver]: Analyzing ICFG mix034_pso.opt_tso.opt.i [2024-06-21 16:44:49,136 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:44:49,136 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 16:44:49,137 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:44:49,179 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:44:49,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 16:44:49,228 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-21 16:44:49,229 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:44:49,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:44:49,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 16:44:49,233 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-21 16:44:49,241 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:44:49,247 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;@76220ce6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:44:49,247 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 16:44:49,251 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:44:49,251 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:44:49,251 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:44:49,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:49,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:44:49,252 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 16:44:49,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:49,257 INFO L85 PathProgramCache]: Analyzing trace with hash 325228573, now seen corresponding path program 1 times [2024-06-21 16:44:49,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:49,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672433674] [2024-06-21 16:44:49,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:49,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:50,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:50,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672433674] [2024-06-21 16:44:50,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672433674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:50,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:50,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:44:50,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286070582] [2024-06-21 16:44:50,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:50,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:44:50,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:50,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:44:50,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:44:50,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-21 16:44:50,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 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 16:44:50,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:50,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-21 16:44:50,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:50,461 INFO L124 PetriNetUnfolderBase]: 131/264 cut-off events. [2024-06-21 16:44:50,462 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-21 16:44:50,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 264 events. 131/264 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1001 event pairs, 75 based on Foata normal form. 1/252 useless extension candidates. Maximal degree in co-relation 509. Up to 235 conditions per place. [2024-06-21 16:44:50,468 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 20 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-21 16:44:50,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 113 flow [2024-06-21 16:44:50,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:44:50,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:44:50,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-06-21 16:44:50,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236559139784946 [2024-06-21 16:44:50,483 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 58 transitions. [2024-06-21 16:44:50,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 113 flow [2024-06-21 16:44:50,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 16:44:50,488 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-21 16:44:50,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-06-21 16:44:50,493 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-21 16:44:50,493 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-21 16:44:50,494 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 16:44:50,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:50,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:50,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:44:50,500 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 16:44:50,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:50,501 INFO L85 PathProgramCache]: Analyzing trace with hash -987918916, now seen corresponding path program 1 times [2024-06-21 16:44:50,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:50,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820423214] [2024-06-21 16:44:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:50,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:51,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:51,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:51,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820423214] [2024-06-21 16:44:51,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820423214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:51,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:51,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:44:51,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998698323] [2024-06-21 16:44:51,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:51,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:44:51,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:51,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:44:51,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:44:51,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-06-21 16:44:51,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:51,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:51,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-06-21 16:44:51,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:51,429 INFO L124 PetriNetUnfolderBase]: 147/287 cut-off events. [2024-06-21 16:44:51,430 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-06-21 16:44:51,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 287 events. 147/287 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1080 event pairs, 47 based on Foata normal form. 4/287 useless extension candidates. Maximal degree in co-relation 635. Up to 244 conditions per place. [2024-06-21 16:44:51,435 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 26 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-06-21 16:44:51,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 36 transitions, 161 flow [2024-06-21 16:44:51,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:44:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:44:51,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-06-21 16:44:51,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5887096774193549 [2024-06-21 16:44:51,439 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 73 transitions. [2024-06-21 16:44:51,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 36 transitions, 161 flow [2024-06-21 16:44:51,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 36 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:44:51,443 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-21 16:44:51,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-06-21 16:44:51,445 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-21 16:44:51,445 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-21 16:44:51,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:51,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:51,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:51,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:44:51,447 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 16:44:51,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:51,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1975365433, now seen corresponding path program 1 times [2024-06-21 16:44:51,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:51,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859386471] [2024-06-21 16:44:51,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:51,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:52,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:52,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859386471] [2024-06-21 16:44:52,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859386471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:52,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:52,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:44:52,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013001984] [2024-06-21 16:44:52,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:52,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:44:52,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:52,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:44:52,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:44:52,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-06-21 16:44:52,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 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 16:44:52,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:52,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-06-21 16:44:52,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:52,923 INFO L124 PetriNetUnfolderBase]: 143/277 cut-off events. [2024-06-21 16:44:52,923 INFO L125 PetriNetUnfolderBase]: For 165/165 co-relation queries the response was YES. [2024-06-21 16:44:52,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695 conditions, 277 events. 143/277 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1023 event pairs, 25 based on Foata normal form. 4/275 useless extension candidates. Maximal degree in co-relation 681. Up to 218 conditions per place. [2024-06-21 16:44:52,925 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 29 selfloop transitions, 8 changer transitions 0/42 dead transitions. [2024-06-21 16:44:52,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 42 transitions, 206 flow [2024-06-21 16:44:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:44:52,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:44:52,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 16:44:52,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2024-06-21 16:44:52,928 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 6 states and 99 transitions. [2024-06-21 16:44:52,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 42 transitions, 206 flow [2024-06-21 16:44:52,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 194 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 16:44:52,930 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 111 flow [2024-06-21 16:44:52,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=111, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2024-06-21 16:44:52,931 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2024-06-21 16:44:52,931 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 111 flow [2024-06-21 16:44:52,931 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 16:44:52,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:52,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:52,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:44:52,932 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:44:52,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:52,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1616060601, now seen corresponding path program 1 times [2024-06-21 16:44:52,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:52,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330630864] [2024-06-21 16:44:52,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:52,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:53,530 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 16:44:53,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:53,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330630864] [2024-06-21 16:44:53,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330630864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:53,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:53,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:44:53,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467752400] [2024-06-21 16:44:53,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:53,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:44:53,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:53,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:44:53,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:44:53,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 16:44:53,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 111 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:53,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:53,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 16:44:53,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:53,765 INFO L124 PetriNetUnfolderBase]: 119/247 cut-off events. [2024-06-21 16:44:53,765 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2024-06-21 16:44:53,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 247 events. 119/247 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 899 event pairs, 34 based on Foata normal form. 1/242 useless extension candidates. Maximal degree in co-relation 652. Up to 211 conditions per place. [2024-06-21 16:44:53,767 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 24 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2024-06-21 16:44:53,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 189 flow [2024-06-21 16:44:53,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:44:53,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:44:53,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-06-21 16:44:53,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4645161290322581 [2024-06-21 16:44:53,769 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 111 flow. Second operand 5 states and 72 transitions. [2024-06-21 16:44:53,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 189 flow [2024-06-21 16:44:53,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 173 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 16:44:53,771 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 122 flow [2024-06-21 16:44:53,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2024-06-21 16:44:53,772 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-06-21 16:44:53,772 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 122 flow [2024-06-21 16:44:53,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:53,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:53,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:53,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:44:53,773 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 16:44:53,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:53,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1415809949, now seen corresponding path program 1 times [2024-06-21 16:44:53,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:53,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558663479] [2024-06-21 16:44:53,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:53,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:54,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:54,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558663479] [2024-06-21 16:44:54,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558663479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:54,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:54,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:44:54,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407349366] [2024-06-21 16:44:54,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:54,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:44:54,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:54,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:44:54,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:44:54,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 16:44:54,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 122 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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 16:44:54,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:54,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 16:44:54,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:54,736 INFO L124 PetriNetUnfolderBase]: 139/275 cut-off events. [2024-06-21 16:44:54,736 INFO L125 PetriNetUnfolderBase]: For 395/395 co-relation queries the response was YES. [2024-06-21 16:44:54,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 275 events. 139/275 cut-off events. For 395/395 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1016 event pairs, 41 based on Foata normal form. 1/275 useless extension candidates. Maximal degree in co-relation 780. Up to 242 conditions per place. [2024-06-21 16:44:54,739 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 26 selfloop transitions, 8 changer transitions 0/38 dead transitions. [2024-06-21 16:44:54,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 212 flow [2024-06-21 16:44:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:44:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:44:54,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 79 transitions. [2024-06-21 16:44:54,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42473118279569894 [2024-06-21 16:44:54,746 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 122 flow. Second operand 6 states and 79 transitions. [2024-06-21 16:44:54,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 212 flow [2024-06-21 16:44:54,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 38 transitions, 201 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 16:44:54,754 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 144 flow [2024-06-21 16:44:54,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=144, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2024-06-21 16:44:54,759 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2024-06-21 16:44:54,760 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 144 flow [2024-06-21 16:44:54,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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 16:44:54,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:54,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:54,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:44:54,764 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:44:54,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:54,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1029528762, now seen corresponding path program 1 times [2024-06-21 16:44:54,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:54,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489421613] [2024-06-21 16:44:54,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:54,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:54,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:55,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:55,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489421613] [2024-06-21 16:44:55,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489421613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:55,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:55,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:44:55,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573456863] [2024-06-21 16:44:55,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:55,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:44:55,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:55,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:44:55,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:44:55,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 16:44:55,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 144 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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 16:44:55,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:55,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 16:44:55,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:55,645 INFO L124 PetriNetUnfolderBase]: 156/299 cut-off events. [2024-06-21 16:44:55,646 INFO L125 PetriNetUnfolderBase]: For 673/673 co-relation queries the response was YES. [2024-06-21 16:44:55,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 950 conditions, 299 events. 156/299 cut-off events. For 673/673 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1100 event pairs, 46 based on Foata normal form. 2/300 useless extension candidates. Maximal degree in co-relation 930. Up to 255 conditions per place. [2024-06-21 16:44:55,648 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 31 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2024-06-21 16:44:55,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 256 flow [2024-06-21 16:44:55,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:44:55,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:44:55,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 83 transitions. [2024-06-21 16:44:55,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44623655913978494 [2024-06-21 16:44:55,650 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 144 flow. Second operand 6 states and 83 transitions. [2024-06-21 16:44:55,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 256 flow [2024-06-21 16:44:55,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 239 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 16:44:55,653 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 160 flow [2024-06-21 16:44:55,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2024-06-21 16:44:55,653 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-06-21 16:44:55,654 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 160 flow [2024-06-21 16:44:55,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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 16:44:55,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:55,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:55,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:44:55,655 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 16:44:55,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:55,655 INFO L85 PathProgramCache]: Analyzing trace with hash -940442562, now seen corresponding path program 2 times [2024-06-21 16:44:55,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:55,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119830302] [2024-06-21 16:44:55,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:55,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:56,268 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 16:44:56,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:56,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119830302] [2024-06-21 16:44:56,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119830302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:56,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:56,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:44:56,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675409576] [2024-06-21 16:44:56,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:56,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:44:56,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:56,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:44:56,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:44:56,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 16:44:56,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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 16:44:56,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:56,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 16:44:56,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:56,485 INFO L124 PetriNetUnfolderBase]: 157/304 cut-off events. [2024-06-21 16:44:56,485 INFO L125 PetriNetUnfolderBase]: For 913/915 co-relation queries the response was YES. [2024-06-21 16:44:56,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1030 conditions, 304 events. 157/304 cut-off events. For 913/915 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1157 event pairs, 50 based on Foata normal form. 4/307 useless extension candidates. Maximal degree in co-relation 1009. Up to 248 conditions per place. [2024-06-21 16:44:56,487 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 28 selfloop transitions, 11 changer transitions 0/44 dead transitions. [2024-06-21 16:44:56,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 272 flow [2024-06-21 16:44:56,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:44:56,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:44:56,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 83 transitions. [2024-06-21 16:44:56,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44623655913978494 [2024-06-21 16:44:56,489 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 160 flow. Second operand 6 states and 83 transitions. [2024-06-21 16:44:56,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 272 flow [2024-06-21 16:44:56,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 44 transitions, 255 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 16:44:56,491 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 186 flow [2024-06-21 16:44:56,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2024-06-21 16:44:56,492 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-21 16:44:56,492 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 186 flow [2024-06-21 16:44:56,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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 16:44:56,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:56,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:56,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:44:56,493 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 16:44:56,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:56,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1743897896, now seen corresponding path program 1 times [2024-06-21 16:44:56,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:56,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404537555] [2024-06-21 16:44:56,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:56,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:57,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:57,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404537555] [2024-06-21 16:44:57,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404537555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:57,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:57,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:44:57,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251898400] [2024-06-21 16:44:57,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:57,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:44:57,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:57,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:44:57,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:44:57,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 16:44:57,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 186 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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 16:44:57,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:57,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 16:44:57,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:57,436 INFO L124 PetriNetUnfolderBase]: 144/284 cut-off events. [2024-06-21 16:44:57,437 INFO L125 PetriNetUnfolderBase]: For 899/899 co-relation queries the response was YES. [2024-06-21 16:44:57,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1005 conditions, 284 events. 144/284 cut-off events. For 899/899 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1059 event pairs, 39 based on Foata normal form. 1/284 useless extension candidates. Maximal degree in co-relation 983. Up to 248 conditions per place. [2024-06-21 16:44:57,454 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 31 selfloop transitions, 10 changer transitions 0/45 dead transitions. [2024-06-21 16:44:57,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 45 transitions, 294 flow [2024-06-21 16:44:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:44:57,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:44:57,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-06-21 16:44:57,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147465437788018 [2024-06-21 16:44:57,457 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 186 flow. Second operand 7 states and 90 transitions. [2024-06-21 16:44:57,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 45 transitions, 294 flow [2024-06-21 16:44:57,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 45 transitions, 267 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 16:44:57,459 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 198 flow [2024-06-21 16:44:57,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2024-06-21 16:44:57,460 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2024-06-21 16:44:57,460 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 198 flow [2024-06-21 16:44:57,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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 16:44:57,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:57,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:57,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:44:57,461 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 16:44:57,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:57,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1850739904, now seen corresponding path program 1 times [2024-06-21 16:44:57,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:57,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242035063] [2024-06-21 16:44:57,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:57,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:58,253 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 16:44:58,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:58,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242035063] [2024-06-21 16:44:58,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242035063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:58,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:58,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:44:58,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931772685] [2024-06-21 16:44:58,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:58,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:44:58,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:58,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:44:58,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:44:58,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 16:44:58,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 198 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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 16:44:58,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:58,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 16:44:58,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:58,600 INFO L124 PetriNetUnfolderBase]: 150/293 cut-off events. [2024-06-21 16:44:58,601 INFO L125 PetriNetUnfolderBase]: For 1248/1248 co-relation queries the response was YES. [2024-06-21 16:44:58,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1087 conditions, 293 events. 150/293 cut-off events. For 1248/1248 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1090 event pairs, 42 based on Foata normal form. 1/293 useless extension candidates. Maximal degree in co-relation 1064. Up to 241 conditions per place. [2024-06-21 16:44:58,603 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 38 selfloop transitions, 10 changer transitions 0/53 dead transitions. [2024-06-21 16:44:58,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 53 transitions, 342 flow [2024-06-21 16:44:58,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:44:58,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:44:58,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-06-21 16:44:58,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423963133640553 [2024-06-21 16:44:58,604 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 198 flow. Second operand 7 states and 96 transitions. [2024-06-21 16:44:58,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 53 transitions, 342 flow [2024-06-21 16:44:58,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 53 transitions, 319 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 16:44:58,607 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 220 flow [2024-06-21 16:44:58,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=220, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2024-06-21 16:44:58,608 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2024-06-21 16:44:58,608 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 220 flow [2024-06-21 16:44:58,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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 16:44:58,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:58,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:58,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:44:58,609 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:44:58,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:58,609 INFO L85 PathProgramCache]: Analyzing trace with hash 904623362, now seen corresponding path program 1 times [2024-06-21 16:44:58,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:58,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530315448] [2024-06-21 16:44:58,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:58,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:59,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:59,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530315448] [2024-06-21 16:44:59,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530315448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:59,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:59,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:44:59,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399796606] [2024-06-21 16:44:59,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:59,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:44:59,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:59,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:44:59,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:44:59,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:44:59,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 220 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 16:44:59,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:59,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:44:59,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:59,586 INFO L124 PetriNetUnfolderBase]: 168/315 cut-off events. [2024-06-21 16:44:59,587 INFO L125 PetriNetUnfolderBase]: For 1559/1559 co-relation queries the response was YES. [2024-06-21 16:44:59,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1219 conditions, 315 events. 168/315 cut-off events. For 1559/1559 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1167 event pairs, 44 based on Foata normal form. 2/316 useless extension candidates. Maximal degree in co-relation 1195. Up to 275 conditions per place. [2024-06-21 16:44:59,589 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 41 selfloop transitions, 10 changer transitions 0/54 dead transitions. [2024-06-21 16:44:59,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 368 flow [2024-06-21 16:44:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:44:59,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:44:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-21 16:44:59,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41013824884792627 [2024-06-21 16:44:59,591 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 220 flow. Second operand 7 states and 89 transitions. [2024-06-21 16:44:59,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 368 flow [2024-06-21 16:44:59,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 54 transitions, 339 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 16:44:59,595 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 234 flow [2024-06-21 16:44:59,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=234, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2024-06-21 16:44:59,597 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 24 predicate places. [2024-06-21 16:44:59,600 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 234 flow [2024-06-21 16:44:59,600 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 16:44:59,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:59,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:59,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:44:59,601 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 16:44:59,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:59,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1845971608, now seen corresponding path program 2 times [2024-06-21 16:44:59,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:59,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148798741] [2024-06-21 16:44:59,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:59,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:00,305 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 16:45:00,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:00,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148798741] [2024-06-21 16:45:00,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148798741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:00,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:00,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:45:00,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587229379] [2024-06-21 16:45:00,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:00,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:45:00,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:00,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:45:00,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:45:00,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:00,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 234 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 16:45:00,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:00,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:00,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:00,552 INFO L124 PetriNetUnfolderBase]: 179/336 cut-off events. [2024-06-21 16:45:00,553 INFO L125 PetriNetUnfolderBase]: For 2033/2035 co-relation queries the response was YES. [2024-06-21 16:45:00,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1366 conditions, 336 events. 179/336 cut-off events. For 2033/2035 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1273 event pairs, 48 based on Foata normal form. 4/339 useless extension candidates. Maximal degree in co-relation 1341. Up to 264 conditions per place. [2024-06-21 16:45:00,555 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 36 selfloop transitions, 18 changer transitions 0/57 dead transitions. [2024-06-21 16:45:00,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 57 transitions, 428 flow [2024-06-21 16:45:00,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:45:00,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:45:00,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2024-06-21 16:45:00,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 16:45:00,556 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 234 flow. Second operand 7 states and 91 transitions. [2024-06-21 16:45:00,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 57 transitions, 428 flow [2024-06-21 16:45:00,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 57 transitions, 401 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 16:45:00,559 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 288 flow [2024-06-21 16:45:00,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=288, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2024-06-21 16:45:00,560 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2024-06-21 16:45:00,560 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 288 flow [2024-06-21 16:45:00,561 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 16:45:00,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:00,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:00,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:45:00,561 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 16:45:00,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:00,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1773494858, now seen corresponding path program 3 times [2024-06-21 16:45:00,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:00,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38491340] [2024-06-21 16:45:00,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:00,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:01,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:01,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38491340] [2024-06-21 16:45:01,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38491340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:01,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:01,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:45:01,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545117355] [2024-06-21 16:45:01,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:01,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:45:01,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:01,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:45:01,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:45:01,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:01,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 288 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 16:45:01,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:01,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:01,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:01,451 INFO L124 PetriNetUnfolderBase]: 175/330 cut-off events. [2024-06-21 16:45:01,451 INFO L125 PetriNetUnfolderBase]: For 2340/2342 co-relation queries the response was YES. [2024-06-21 16:45:01,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1397 conditions, 330 events. 175/330 cut-off events. For 2340/2342 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1253 event pairs, 50 based on Foata normal form. 4/333 useless extension candidates. Maximal degree in co-relation 1371. Up to 261 conditions per place. [2024-06-21 16:45:01,454 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 36 selfloop transitions, 17 changer transitions 0/56 dead transitions. [2024-06-21 16:45:01,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 422 flow [2024-06-21 16:45:01,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:45:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:45:01,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2024-06-21 16:45:01,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 16:45:01,455 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 288 flow. Second operand 7 states and 91 transitions. [2024-06-21 16:45:01,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 422 flow [2024-06-21 16:45:01,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 56 transitions, 387 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 16:45:01,459 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 292 flow [2024-06-21 16:45:01,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=292, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2024-06-21 16:45:01,460 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 30 predicate places. [2024-06-21 16:45:01,460 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 292 flow [2024-06-21 16:45:01,461 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 16:45:01,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:01,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:01,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:45:01,461 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 16:45:01,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:01,462 INFO L85 PathProgramCache]: Analyzing trace with hash -915519820, now seen corresponding path program 1 times [2024-06-21 16:45:01,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:01,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699199703] [2024-06-21 16:45:01,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:01,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:02,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:02,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699199703] [2024-06-21 16:45:02,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699199703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:02,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:02,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:02,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192170196] [2024-06-21 16:45:02,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:02,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:02,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:02,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:02,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:02,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:02,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 292 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 16:45:02,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:02,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:02,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:02,597 INFO L124 PetriNetUnfolderBase]: 193/365 cut-off events. [2024-06-21 16:45:02,597 INFO L125 PetriNetUnfolderBase]: For 2617/2617 co-relation queries the response was YES. [2024-06-21 16:45:02,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1578 conditions, 365 events. 193/365 cut-off events. For 2617/2617 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1439 event pairs, 48 based on Foata normal form. 1/365 useless extension candidates. Maximal degree in co-relation 1550. Up to 308 conditions per place. [2024-06-21 16:45:02,600 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 49 selfloop transitions, 18 changer transitions 0/70 dead transitions. [2024-06-21 16:45:02,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 70 transitions, 533 flow [2024-06-21 16:45:02,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:02,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 16:45:02,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 16:45:02,601 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 292 flow. Second operand 9 states and 111 transitions. [2024-06-21 16:45:02,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 70 transitions, 533 flow [2024-06-21 16:45:02,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 70 transitions, 483 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:02,606 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 381 flow [2024-06-21 16:45:02,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=381, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2024-06-21 16:45:02,607 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2024-06-21 16:45:02,607 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 381 flow [2024-06-21 16:45:02,607 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 16:45:02,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:02,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:02,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:45:02,608 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 16:45:02,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:02,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2052493188, now seen corresponding path program 2 times [2024-06-21 16:45:02,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:02,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662918319] [2024-06-21 16:45:02,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:02,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:03,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:03,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662918319] [2024-06-21 16:45:03,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662918319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:03,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:03,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:03,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465724353] [2024-06-21 16:45:03,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:03,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:03,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:03,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:03,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:03,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:03,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 381 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 16:45:03,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:03,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:03,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:03,740 INFO L124 PetriNetUnfolderBase]: 191/362 cut-off events. [2024-06-21 16:45:03,740 INFO L125 PetriNetUnfolderBase]: For 3007/3007 co-relation queries the response was YES. [2024-06-21 16:45:03,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1627 conditions, 362 events. 191/362 cut-off events. For 3007/3007 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1418 event pairs, 47 based on Foata normal form. 1/362 useless extension candidates. Maximal degree in co-relation 1595. Up to 297 conditions per place. [2024-06-21 16:45:03,743 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 47 selfloop transitions, 22 changer transitions 0/72 dead transitions. [2024-06-21 16:45:03,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 72 transitions, 583 flow [2024-06-21 16:45:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:03,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:03,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-21 16:45:03,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 16:45:03,744 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 381 flow. Second operand 8 states and 100 transitions. [2024-06-21 16:45:03,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 72 transitions, 583 flow [2024-06-21 16:45:03,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 72 transitions, 548 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 16:45:03,749 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 428 flow [2024-06-21 16:45:03,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=428, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2024-06-21 16:45:03,750 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2024-06-21 16:45:03,750 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 428 flow [2024-06-21 16:45:03,750 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 16:45:03,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:03,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:03,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:45:03,751 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 16:45:03,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:03,751 INFO L85 PathProgramCache]: Analyzing trace with hash -2052343241, now seen corresponding path program 1 times [2024-06-21 16:45:03,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:03,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560644778] [2024-06-21 16:45:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:03,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:03,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:04,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:04,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560644778] [2024-06-21 16:45:04,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560644778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:04,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:04,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:04,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427800860] [2024-06-21 16:45:04,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:04,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:04,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:04,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:04,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:04,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:04,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 428 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 16:45:04,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:04,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:04,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:04,795 INFO L124 PetriNetUnfolderBase]: 197/372 cut-off events. [2024-06-21 16:45:04,795 INFO L125 PetriNetUnfolderBase]: For 3542/3542 co-relation queries the response was YES. [2024-06-21 16:45:04,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1729 conditions, 372 events. 197/372 cut-off events. For 3542/3542 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1462 event pairs, 44 based on Foata normal form. 2/373 useless extension candidates. Maximal degree in co-relation 1696. Up to 313 conditions per place. [2024-06-21 16:45:04,798 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 58 selfloop transitions, 14 changer transitions 0/75 dead transitions. [2024-06-21 16:45:04,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 75 transitions, 636 flow [2024-06-21 16:45:04,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:04,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:04,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-21 16:45:04,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 16:45:04,800 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 428 flow. Second operand 8 states and 100 transitions. [2024-06-21 16:45:04,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 75 transitions, 636 flow [2024-06-21 16:45:04,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 75 transitions, 572 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:04,806 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 421 flow [2024-06-21 16:45:04,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=421, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2024-06-21 16:45:04,807 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2024-06-21 16:45:04,808 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 421 flow [2024-06-21 16:45:04,808 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 16:45:04,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:04,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:04,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:45:04,808 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 16:45:04,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:04,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1814525667, now seen corresponding path program 2 times [2024-06-21 16:45:04,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:04,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578250290] [2024-06-21 16:45:04,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:04,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:05,513 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 16:45:05,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:05,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578250290] [2024-06-21 16:45:05,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578250290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:05,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:05,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:05,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188029696] [2024-06-21 16:45:05,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:05,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:05,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:05,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:05,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:05,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:05,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 421 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 16:45:05,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:05,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:05,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:05,736 INFO L124 PetriNetUnfolderBase]: 208/393 cut-off events. [2024-06-21 16:45:05,737 INFO L125 PetriNetUnfolderBase]: For 3723/3725 co-relation queries the response was YES. [2024-06-21 16:45:05,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1815 conditions, 393 events. 208/393 cut-off events. For 3723/3725 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1577 event pairs, 45 based on Foata normal form. 4/396 useless extension candidates. Maximal degree in co-relation 1781. Up to 281 conditions per place. [2024-06-21 16:45:05,740 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 51 selfloop transitions, 26 changer transitions 0/80 dead transitions. [2024-06-21 16:45:05,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 80 transitions, 695 flow [2024-06-21 16:45:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:05,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:05,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2024-06-21 16:45:05,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153225806451613 [2024-06-21 16:45:05,741 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 421 flow. Second operand 8 states and 103 transitions. [2024-06-21 16:45:05,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 80 transitions, 695 flow [2024-06-21 16:45:05,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 80 transitions, 656 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:05,747 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 502 flow [2024-06-21 16:45:05,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=502, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2024-06-21 16:45:05,748 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 46 predicate places. [2024-06-21 16:45:05,748 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 502 flow [2024-06-21 16:45:05,749 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 16:45:05,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:05,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:05,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:45:05,749 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 16:45:05,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:05,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1821942417, now seen corresponding path program 3 times [2024-06-21 16:45:05,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:05,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555743716] [2024-06-21 16:45:05,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:05,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:06,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:06,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555743716] [2024-06-21 16:45:06,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555743716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:06,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:06,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:06,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474359923] [2024-06-21 16:45:06,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:06,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:06,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:06,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:06,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:06,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:06,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 502 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 16:45:06,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:06,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:06,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:06,712 INFO L124 PetriNetUnfolderBase]: 214/403 cut-off events. [2024-06-21 16:45:06,712 INFO L125 PetriNetUnfolderBase]: For 4299/4301 co-relation queries the response was YES. [2024-06-21 16:45:06,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1976 conditions, 403 events. 214/403 cut-off events. For 4299/4301 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1623 event pairs, 45 based on Foata normal form. 4/406 useless extension candidates. Maximal degree in co-relation 1940. Up to 287 conditions per place. [2024-06-21 16:45:06,716 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 53 selfloop transitions, 26 changer transitions 0/82 dead transitions. [2024-06-21 16:45:06,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 82 transitions, 762 flow [2024-06-21 16:45:06,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:06,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:06,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-21 16:45:06,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 16:45:06,717 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 502 flow. Second operand 8 states and 104 transitions. [2024-06-21 16:45:06,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 82 transitions, 762 flow [2024-06-21 16:45:06,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 82 transitions, 714 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 16:45:06,724 INFO L231 Difference]: Finished difference. Result has 80 places, 68 transitions, 539 flow [2024-06-21 16:45:06,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=539, PETRI_PLACES=80, PETRI_TRANSITIONS=68} [2024-06-21 16:45:06,725 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2024-06-21 16:45:06,725 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 68 transitions, 539 flow [2024-06-21 16:45:06,725 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 16:45:06,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:06,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:06,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:45:06,726 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 16:45:06,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:06,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1822144227, now seen corresponding path program 4 times [2024-06-21 16:45:06,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:06,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944306920] [2024-06-21 16:45:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:06,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:07,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:07,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944306920] [2024-06-21 16:45:07,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944306920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:07,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:07,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:07,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308143758] [2024-06-21 16:45:07,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:07,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:07,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:07,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:07,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:07,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:07,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 68 transitions, 539 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 16:45:07,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:07,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:07,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:07,696 INFO L124 PetriNetUnfolderBase]: 210/397 cut-off events. [2024-06-21 16:45:07,696 INFO L125 PetriNetUnfolderBase]: For 4453/4455 co-relation queries the response was YES. [2024-06-21 16:45:07,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1979 conditions, 397 events. 210/397 cut-off events. For 4453/4455 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1601 event pairs, 51 based on Foata normal form. 4/400 useless extension candidates. Maximal degree in co-relation 1941. Up to 284 conditions per place. [2024-06-21 16:45:07,699 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 53 selfloop transitions, 26 changer transitions 0/82 dead transitions. [2024-06-21 16:45:07,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 82 transitions, 748 flow [2024-06-21 16:45:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:07,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:07,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-21 16:45:07,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 16:45:07,701 INFO L175 Difference]: Start difference. First operand has 80 places, 68 transitions, 539 flow. Second operand 8 states and 104 transitions. [2024-06-21 16:45:07,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 82 transitions, 748 flow [2024-06-21 16:45:07,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 82 transitions, 681 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 16:45:07,708 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 538 flow [2024-06-21 16:45:07,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=538, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2024-06-21 16:45:07,709 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2024-06-21 16:45:07,709 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 538 flow [2024-06-21 16:45:07,710 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 16:45:07,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:07,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:07,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:45:07,710 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 16:45:07,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:07,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1814515747, now seen corresponding path program 1 times [2024-06-21 16:45:07,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:07,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947262746] [2024-06-21 16:45:07,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:07,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:08,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:08,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947262746] [2024-06-21 16:45:08,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947262746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:08,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:08,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:45:08,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457066033] [2024-06-21 16:45:08,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:08,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:45:08,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:08,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:45:08,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:08,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:08,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 538 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 16:45:08,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:08,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:08,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:08,932 INFO L124 PetriNetUnfolderBase]: 208/392 cut-off events. [2024-06-21 16:45:08,932 INFO L125 PetriNetUnfolderBase]: For 4534/4536 co-relation queries the response was YES. [2024-06-21 16:45:08,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1963 conditions, 392 events. 208/392 cut-off events. For 4534/4536 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1556 event pairs, 55 based on Foata normal form. 1/392 useless extension candidates. Maximal degree in co-relation 1924. Up to 352 conditions per place. [2024-06-21 16:45:08,935 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 63 selfloop transitions, 14 changer transitions 0/80 dead transitions. [2024-06-21 16:45:08,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 80 transitions, 726 flow [2024-06-21 16:45:08,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-06-21 16:45:08,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3727598566308244 [2024-06-21 16:45:08,939 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 538 flow. Second operand 9 states and 104 transitions. [2024-06-21 16:45:08,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 80 transitions, 726 flow [2024-06-21 16:45:08,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 80 transitions, 684 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 16:45:08,949 INFO L231 Difference]: Finished difference. Result has 87 places, 71 transitions, 545 flow [2024-06-21 16:45:08,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=545, PETRI_PLACES=87, PETRI_TRANSITIONS=71} [2024-06-21 16:45:08,949 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2024-06-21 16:45:08,949 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 71 transitions, 545 flow [2024-06-21 16:45:08,950 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 16:45:08,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:08,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:08,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:45:08,950 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 16:45:08,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:08,951 INFO L85 PathProgramCache]: Analyzing trace with hash 683537005, now seen corresponding path program 1 times [2024-06-21 16:45:08,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:08,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253763359] [2024-06-21 16:45:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:08,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:09,710 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 16:45:09,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:09,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253763359] [2024-06-21 16:45:09,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253763359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:09,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:09,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:09,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322189748] [2024-06-21 16:45:09,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:09,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:09,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:09,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:09,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:09,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 16:45:09,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 71 transitions, 545 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:09,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:09,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 16:45:09,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:10,055 INFO L124 PetriNetUnfolderBase]: 193/380 cut-off events. [2024-06-21 16:45:10,055 INFO L125 PetriNetUnfolderBase]: For 5160/5160 co-relation queries the response was YES. [2024-06-21 16:45:10,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1933 conditions, 380 events. 193/380 cut-off events. For 5160/5160 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1576 event pairs, 23 based on Foata normal form. 2/379 useless extension candidates. Maximal degree in co-relation 1893. Up to 273 conditions per place. [2024-06-21 16:45:10,058 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 61 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-06-21 16:45:10,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 87 transitions, 751 flow [2024-06-21 16:45:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:10,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-21 16:45:10,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-06-21 16:45:10,059 INFO L175 Difference]: Start difference. First operand has 87 places, 71 transitions, 545 flow. Second operand 8 states and 106 transitions. [2024-06-21 16:45:10,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 87 transitions, 751 flow [2024-06-21 16:45:10,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 87 transitions, 669 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 16:45:10,067 INFO L231 Difference]: Finished difference. Result has 85 places, 72 transitions, 511 flow [2024-06-21 16:45:10,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=511, PETRI_PLACES=85, PETRI_TRANSITIONS=72} [2024-06-21 16:45:10,067 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2024-06-21 16:45:10,068 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 72 transitions, 511 flow [2024-06-21 16:45:10,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:10,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:10,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:10,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:45:10,069 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 16:45:10,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:10,069 INFO L85 PathProgramCache]: Analyzing trace with hash 686393965, now seen corresponding path program 2 times [2024-06-21 16:45:10,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:10,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64498165] [2024-06-21 16:45:10,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:10,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:10,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:10,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64498165] [2024-06-21 16:45:10,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64498165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:10,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:10,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:10,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564836544] [2024-06-21 16:45:10,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:10,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:10,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:10,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:10,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:10,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 16:45:10,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 72 transitions, 511 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:10,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:10,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 16:45:10,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:11,212 INFO L124 PetriNetUnfolderBase]: 197/388 cut-off events. [2024-06-21 16:45:11,213 INFO L125 PetriNetUnfolderBase]: For 5681/5681 co-relation queries the response was YES. [2024-06-21 16:45:11,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1963 conditions, 388 events. 197/388 cut-off events. For 5681/5681 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1622 event pairs, 40 based on Foata normal form. 2/387 useless extension candidates. Maximal degree in co-relation 1923. Up to 297 conditions per place. [2024-06-21 16:45:11,216 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 58 selfloop transitions, 19 changer transitions 0/87 dead transitions. [2024-06-21 16:45:11,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 87 transitions, 717 flow [2024-06-21 16:45:11,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-21 16:45:11,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2024-06-21 16:45:11,218 INFO L175 Difference]: Start difference. First operand has 85 places, 72 transitions, 511 flow. Second operand 8 states and 107 transitions. [2024-06-21 16:45:11,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 87 transitions, 717 flow [2024-06-21 16:45:11,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 87 transitions, 679 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:11,226 INFO L231 Difference]: Finished difference. Result has 87 places, 73 transitions, 530 flow [2024-06-21 16:45:11,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=530, PETRI_PLACES=87, PETRI_TRANSITIONS=73} [2024-06-21 16:45:11,226 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2024-06-21 16:45:11,226 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 73 transitions, 530 flow [2024-06-21 16:45:11,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:11,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:11,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:11,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:45:11,227 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 16:45:11,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:11,228 INFO L85 PathProgramCache]: Analyzing trace with hash -444561505, now seen corresponding path program 1 times [2024-06-21 16:45:11,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:11,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938049486] [2024-06-21 16:45:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:11,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:12,073 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 16:45:12,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:12,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938049486] [2024-06-21 16:45:12,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938049486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:12,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:12,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:45:12,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25863433] [2024-06-21 16:45:12,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:12,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:45:12,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:12,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:45:12,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:12,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:12,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 73 transitions, 530 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 16:45:12,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:12,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:12,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:12,412 INFO L124 PetriNetUnfolderBase]: 214/406 cut-off events. [2024-06-21 16:45:12,413 INFO L125 PetriNetUnfolderBase]: For 5850/5850 co-relation queries the response was YES. [2024-06-21 16:45:12,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2030 conditions, 406 events. 214/406 cut-off events. For 5850/5850 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1636 event pairs, 48 based on Foata normal form. 1/406 useless extension candidates. Maximal degree in co-relation 1989. Up to 334 conditions per place. [2024-06-21 16:45:12,416 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 62 selfloop transitions, 24 changer transitions 0/89 dead transitions. [2024-06-21 16:45:12,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 89 transitions, 768 flow [2024-06-21 16:45:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:12,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-21 16:45:12,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942652329749104 [2024-06-21 16:45:12,420 INFO L175 Difference]: Start difference. First operand has 87 places, 73 transitions, 530 flow. Second operand 9 states and 110 transitions. [2024-06-21 16:45:12,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 89 transitions, 768 flow [2024-06-21 16:45:12,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 723 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:12,428 INFO L231 Difference]: Finished difference. Result has 90 places, 75 transitions, 569 flow [2024-06-21 16:45:12,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=569, PETRI_PLACES=90, PETRI_TRANSITIONS=75} [2024-06-21 16:45:12,429 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2024-06-21 16:45:12,429 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 75 transitions, 569 flow [2024-06-21 16:45:12,429 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 16:45:12,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:12,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:12,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:45:12,430 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 16:45:12,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:12,431 INFO L85 PathProgramCache]: Analyzing trace with hash -329275295, now seen corresponding path program 3 times [2024-06-21 16:45:12,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:12,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552320769] [2024-06-21 16:45:12,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:12,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:13,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:13,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552320769] [2024-06-21 16:45:13,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552320769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:13,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:13,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:13,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872094554] [2024-06-21 16:45:13,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:13,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:13,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:13,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:13,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:13,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 16:45:13,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 75 transitions, 569 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:13,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:13,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 16:45:13,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:13,659 INFO L124 PetriNetUnfolderBase]: 200/394 cut-off events. [2024-06-21 16:45:13,659 INFO L125 PetriNetUnfolderBase]: For 6695/6695 co-relation queries the response was YES. [2024-06-21 16:45:13,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2035 conditions, 394 events. 200/394 cut-off events. For 6695/6695 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1650 event pairs, 38 based on Foata normal form. 2/393 useless extension candidates. Maximal degree in co-relation 1993. Up to 321 conditions per place. [2024-06-21 16:45:13,661 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 67 selfloop transitions, 13 changer transitions 0/90 dead transitions. [2024-06-21 16:45:13,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 90 transitions, 787 flow [2024-06-21 16:45:13,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:13,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-21 16:45:13,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 16:45:13,662 INFO L175 Difference]: Start difference. First operand has 90 places, 75 transitions, 569 flow. Second operand 8 states and 104 transitions. [2024-06-21 16:45:13,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 90 transitions, 787 flow [2024-06-21 16:45:13,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 721 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 16:45:13,669 INFO L231 Difference]: Finished difference. Result has 92 places, 78 transitions, 565 flow [2024-06-21 16:45:13,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=565, PETRI_PLACES=92, PETRI_TRANSITIONS=78} [2024-06-21 16:45:13,670 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2024-06-21 16:45:13,670 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 78 transitions, 565 flow [2024-06-21 16:45:13,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:13,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:13,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:13,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:45:13,671 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 16:45:13,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:13,671 INFO L85 PathProgramCache]: Analyzing trace with hash 801869833, now seen corresponding path program 1 times [2024-06-21 16:45:13,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:13,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447206478] [2024-06-21 16:45:13,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:13,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:14,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:14,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447206478] [2024-06-21 16:45:14,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447206478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:14,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:14,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:45:14,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844407059] [2024-06-21 16:45:14,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:14,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:45:14,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:14,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:45:14,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:14,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:14,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 78 transitions, 565 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 16:45:14,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:14,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:14,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:14,732 INFO L124 PetriNetUnfolderBase]: 224/426 cut-off events. [2024-06-21 16:45:14,732 INFO L125 PetriNetUnfolderBase]: For 7171/7171 co-relation queries the response was YES. [2024-06-21 16:45:14,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2184 conditions, 426 events. 224/426 cut-off events. For 7171/7171 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1758 event pairs, 43 based on Foata normal form. 2/427 useless extension candidates. Maximal degree in co-relation 2140. Up to 355 conditions per place. [2024-06-21 16:45:14,736 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 75 selfloop transitions, 17 changer transitions 0/95 dead transitions. [2024-06-21 16:45:14,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 95 transitions, 827 flow [2024-06-21 16:45:14,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:14,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:14,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 16:45:14,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 16:45:14,738 INFO L175 Difference]: Start difference. First operand has 92 places, 78 transitions, 565 flow. Second operand 9 states and 111 transitions. [2024-06-21 16:45:14,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 95 transitions, 827 flow [2024-06-21 16:45:14,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 95 transitions, 791 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 16:45:14,748 INFO L231 Difference]: Finished difference. Result has 96 places, 80 transitions, 598 flow [2024-06-21 16:45:14,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=598, PETRI_PLACES=96, PETRI_TRANSITIONS=80} [2024-06-21 16:45:14,749 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2024-06-21 16:45:14,749 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 80 transitions, 598 flow [2024-06-21 16:45:14,749 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 16:45:14,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:14,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:14,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:45:14,750 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 16:45:14,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:14,750 INFO L85 PathProgramCache]: Analyzing trace with hash -652080023, now seen corresponding path program 4 times [2024-06-21 16:45:14,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:14,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390647330] [2024-06-21 16:45:14,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:14,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:15,677 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 16:45:15,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:15,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390647330] [2024-06-21 16:45:15,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390647330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:15,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:15,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:15,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366579860] [2024-06-21 16:45:15,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:15,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:15,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:15,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:15,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:15,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 16:45:15,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 80 transitions, 598 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:15,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:15,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 16:45:15,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:16,029 INFO L124 PetriNetUnfolderBase]: 203/399 cut-off events. [2024-06-21 16:45:16,029 INFO L125 PetriNetUnfolderBase]: For 7237/7241 co-relation queries the response was YES. [2024-06-21 16:45:16,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2071 conditions, 399 events. 203/399 cut-off events. For 7237/7241 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1680 event pairs, 42 based on Foata normal form. 2/395 useless extension candidates. Maximal degree in co-relation 2026. Up to 293 conditions per place. [2024-06-21 16:45:16,032 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 56 selfloop transitions, 25 changer transitions 0/91 dead transitions. [2024-06-21 16:45:16,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 91 transitions, 794 flow [2024-06-21 16:45:16,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:16,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:16,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-06-21 16:45:16,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42338709677419356 [2024-06-21 16:45:16,034 INFO L175 Difference]: Start difference. First operand has 96 places, 80 transitions, 598 flow. Second operand 8 states and 105 transitions. [2024-06-21 16:45:16,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 91 transitions, 794 flow [2024-06-21 16:45:16,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 91 transitions, 741 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 16:45:16,049 INFO L231 Difference]: Finished difference. Result has 98 places, 82 transitions, 616 flow [2024-06-21 16:45:16,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=616, PETRI_PLACES=98, PETRI_TRANSITIONS=82} [2024-06-21 16:45:16,050 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 68 predicate places. [2024-06-21 16:45:16,050 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 82 transitions, 616 flow [2024-06-21 16:45:16,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:16,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:16,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:16,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:45:16,051 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 16:45:16,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:16,051 INFO L85 PathProgramCache]: Analyzing trace with hash -415719965, now seen corresponding path program 2 times [2024-06-21 16:45:16,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:16,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552247713] [2024-06-21 16:45:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:16,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:16,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:16,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552247713] [2024-06-21 16:45:16,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552247713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:16,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:16,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:45:16,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135263600] [2024-06-21 16:45:16,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:16,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:45:16,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:16,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:45:16,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:16,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:16,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 82 transitions, 616 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 16:45:16,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:16,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:16,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:17,139 INFO L124 PetriNetUnfolderBase]: 242/456 cut-off events. [2024-06-21 16:45:17,140 INFO L125 PetriNetUnfolderBase]: For 9025/9027 co-relation queries the response was YES. [2024-06-21 16:45:17,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2479 conditions, 456 events. 242/456 cut-off events. For 9025/9027 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1901 event pairs, 40 based on Foata normal form. 4/459 useless extension candidates. Maximal degree in co-relation 2432. Up to 298 conditions per place. [2024-06-21 16:45:17,144 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 64 selfloop transitions, 37 changer transitions 0/104 dead transitions. [2024-06-21 16:45:17,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 104 transitions, 1068 flow [2024-06-21 16:45:17,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:17,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-21 16:45:17,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 16:45:17,157 INFO L175 Difference]: Start difference. First operand has 98 places, 82 transitions, 616 flow. Second operand 9 states and 117 transitions. [2024-06-21 16:45:17,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 104 transitions, 1068 flow [2024-06-21 16:45:17,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 104 transitions, 986 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:17,168 INFO L231 Difference]: Finished difference. Result has 101 places, 88 transitions, 707 flow [2024-06-21 16:45:17,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=707, PETRI_PLACES=101, PETRI_TRANSITIONS=88} [2024-06-21 16:45:17,169 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 71 predicate places. [2024-06-21 16:45:17,169 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 88 transitions, 707 flow [2024-06-21 16:45:17,169 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 16:45:17,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:17,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:17,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:45:17,170 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 16:45:17,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:17,170 INFO L85 PathProgramCache]: Analyzing trace with hash -415711595, now seen corresponding path program 3 times [2024-06-21 16:45:17,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:17,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5361135] [2024-06-21 16:45:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:17,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:17,923 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 16:45:17,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:17,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5361135] [2024-06-21 16:45:17,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5361135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:17,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:17,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:45:17,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536977427] [2024-06-21 16:45:17,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:17,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:45:17,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:17,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:45:17,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:18,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:18,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 88 transitions, 707 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 16:45:18,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:18,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:18,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:18,217 INFO L124 PetriNetUnfolderBase]: 238/452 cut-off events. [2024-06-21 16:45:18,217 INFO L125 PetriNetUnfolderBase]: For 9097/9099 co-relation queries the response was YES. [2024-06-21 16:45:18,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2450 conditions, 452 events. 238/452 cut-off events. For 9097/9099 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1914 event pairs, 48 based on Foata normal form. 2/453 useless extension candidates. Maximal degree in co-relation 2402. Up to 403 conditions per place. [2024-06-21 16:45:18,219 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 81 selfloop transitions, 14 changer transitions 0/98 dead transitions. [2024-06-21 16:45:18,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 98 transitions, 927 flow [2024-06-21 16:45:18,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:18,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:18,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-21 16:45:18,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 16:45:18,221 INFO L175 Difference]: Start difference. First operand has 101 places, 88 transitions, 707 flow. Second operand 9 states and 105 transitions. [2024-06-21 16:45:18,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 98 transitions, 927 flow [2024-06-21 16:45:18,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 98 transitions, 845 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 16:45:18,230 INFO L231 Difference]: Finished difference. Result has 106 places, 88 transitions, 658 flow [2024-06-21 16:45:18,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=658, PETRI_PLACES=106, PETRI_TRANSITIONS=88} [2024-06-21 16:45:18,231 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 76 predicate places. [2024-06-21 16:45:18,231 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 88 transitions, 658 flow [2024-06-21 16:45:18,231 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 16:45:18,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:18,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:18,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:45:18,231 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 16:45:18,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:18,232 INFO L85 PathProgramCache]: Analyzing trace with hash -773431287, now seen corresponding path program 4 times [2024-06-21 16:45:18,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:18,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730071746] [2024-06-21 16:45:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:18,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:18,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:18,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730071746] [2024-06-21 16:45:18,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730071746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:18,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:18,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:45:18,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991873663] [2024-06-21 16:45:18,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:18,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:45:18,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:18,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:45:18,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:19,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:19,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 88 transitions, 658 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 16:45:19,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:19,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:19,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:19,213 INFO L124 PetriNetUnfolderBase]: 244/464 cut-off events. [2024-06-21 16:45:19,213 INFO L125 PetriNetUnfolderBase]: For 9500/9502 co-relation queries the response was YES. [2024-06-21 16:45:19,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2495 conditions, 464 events. 244/464 cut-off events. For 9500/9502 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1962 event pairs, 46 based on Foata normal form. 4/467 useless extension candidates. Maximal degree in co-relation 2445. Up to 301 conditions per place. [2024-06-21 16:45:19,217 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 68 selfloop transitions, 35 changer transitions 0/106 dead transitions. [2024-06-21 16:45:19,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 106 transitions, 1018 flow [2024-06-21 16:45:19,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:19,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:19,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 16:45:19,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-21 16:45:19,219 INFO L175 Difference]: Start difference. First operand has 106 places, 88 transitions, 658 flow. Second operand 9 states and 118 transitions. [2024-06-21 16:45:19,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 106 transitions, 1018 flow [2024-06-21 16:45:19,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 106 transitions, 985 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 16:45:19,231 INFO L231 Difference]: Finished difference. Result has 107 places, 90 transitions, 732 flow [2024-06-21 16:45:19,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=732, PETRI_PLACES=107, PETRI_TRANSITIONS=90} [2024-06-21 16:45:19,232 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2024-06-21 16:45:19,232 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 90 transitions, 732 flow [2024-06-21 16:45:19,232 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 16:45:19,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:19,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:19,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:45:19,233 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 16:45:19,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:19,233 INFO L85 PathProgramCache]: Analyzing trace with hash -423994175, now seen corresponding path program 5 times [2024-06-21 16:45:19,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:19,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360367320] [2024-06-21 16:45:19,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:19,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:19,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:19,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360367320] [2024-06-21 16:45:19,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360367320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:19,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:19,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:45:19,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219636767] [2024-06-21 16:45:19,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:19,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:45:19,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:19,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:45:19,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:20,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:20,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 90 transitions, 732 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 16:45:20,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:20,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:20,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:20,236 INFO L124 PetriNetUnfolderBase]: 240/456 cut-off events. [2024-06-21 16:45:20,236 INFO L125 PetriNetUnfolderBase]: For 9524/9526 co-relation queries the response was YES. [2024-06-21 16:45:20,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2488 conditions, 456 events. 240/456 cut-off events. For 9524/9526 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1926 event pairs, 45 based on Foata normal form. 4/459 useless extension candidates. Maximal degree in co-relation 2437. Up to 298 conditions per place. [2024-06-21 16:45:20,240 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 64 selfloop transitions, 37 changer transitions 0/104 dead transitions. [2024-06-21 16:45:20,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 104 transitions, 994 flow [2024-06-21 16:45:20,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:20,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:20,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-06-21 16:45:20,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157706093189964 [2024-06-21 16:45:20,242 INFO L175 Difference]: Start difference. First operand has 107 places, 90 transitions, 732 flow. Second operand 9 states and 116 transitions. [2024-06-21 16:45:20,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 104 transitions, 994 flow [2024-06-21 16:45:20,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 104 transitions, 897 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:20,254 INFO L231 Difference]: Finished difference. Result has 110 places, 90 transitions, 714 flow [2024-06-21 16:45:20,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=714, PETRI_PLACES=110, PETRI_TRANSITIONS=90} [2024-06-21 16:45:20,255 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 80 predicate places. [2024-06-21 16:45:20,255 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 90 transitions, 714 flow [2024-06-21 16:45:20,255 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 16:45:20,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:20,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:20,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:45:20,256 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 16:45:20,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:20,256 INFO L85 PathProgramCache]: Analyzing trace with hash -415412383, now seen corresponding path program 1 times [2024-06-21 16:45:20,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:20,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12943853] [2024-06-21 16:45:20,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:20,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:21,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:21,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12943853] [2024-06-21 16:45:21,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12943853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:21,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:21,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:21,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756227725] [2024-06-21 16:45:21,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:21,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:21,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:21,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:21,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:21,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:21,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 90 transitions, 714 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 16:45:21,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:21,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:21,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:21,682 INFO L124 PetriNetUnfolderBase]: 237/447 cut-off events. [2024-06-21 16:45:21,682 INFO L125 PetriNetUnfolderBase]: For 9210/9212 co-relation queries the response was YES. [2024-06-21 16:45:21,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2398 conditions, 447 events. 237/447 cut-off events. For 9210/9212 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1854 event pairs, 45 based on Foata normal form. 2/448 useless extension candidates. Maximal degree in co-relation 2346. Up to 399 conditions per place. [2024-06-21 16:45:21,686 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 83 selfloop transitions, 15 changer transitions 0/101 dead transitions. [2024-06-21 16:45:21,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 101 transitions, 936 flow [2024-06-21 16:45:21,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:21,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 16:45:21,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36451612903225805 [2024-06-21 16:45:21,693 INFO L175 Difference]: Start difference. First operand has 110 places, 90 transitions, 714 flow. Second operand 10 states and 113 transitions. [2024-06-21 16:45:21,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 101 transitions, 936 flow [2024-06-21 16:45:21,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 101 transitions, 831 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 16:45:21,706 INFO L231 Difference]: Finished difference. Result has 111 places, 90 transitions, 643 flow [2024-06-21 16:45:21,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=643, PETRI_PLACES=111, PETRI_TRANSITIONS=90} [2024-06-21 16:45:21,707 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 81 predicate places. [2024-06-21 16:45:21,707 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 90 transitions, 643 flow [2024-06-21 16:45:21,707 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 16:45:21,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:21,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:21,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:45:21,708 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 16:45:21,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:21,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1484003887, now seen corresponding path program 1 times [2024-06-21 16:45:21,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:21,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309601918] [2024-06-21 16:45:21,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:21,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:22,484 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 16:45:22,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:22,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309601918] [2024-06-21 16:45:22,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309601918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:22,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:22,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:45:22,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024767737] [2024-06-21 16:45:22,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:22,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:45:22,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:22,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:45:22,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:22,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:22,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 90 transitions, 643 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 16:45:22,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:22,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:22,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:22,784 INFO L124 PetriNetUnfolderBase]: 241/458 cut-off events. [2024-06-21 16:45:22,784 INFO L125 PetriNetUnfolderBase]: For 9611/9611 co-relation queries the response was YES. [2024-06-21 16:45:22,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2380 conditions, 458 events. 241/458 cut-off events. For 9611/9611 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1926 event pairs, 26 based on Foata normal form. 2/459 useless extension candidates. Maximal degree in co-relation 2327. Up to 361 conditions per place. [2024-06-21 16:45:22,787 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 88 selfloop transitions, 17 changer transitions 0/108 dead transitions. [2024-06-21 16:45:22,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 108 transitions, 909 flow [2024-06-21 16:45:22,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:22,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:22,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 16:45:22,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-21 16:45:22,789 INFO L175 Difference]: Start difference. First operand has 111 places, 90 transitions, 643 flow. Second operand 9 states and 109 transitions. [2024-06-21 16:45:22,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 108 transitions, 909 flow [2024-06-21 16:45:22,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 108 transitions, 871 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 16:45:22,811 INFO L231 Difference]: Finished difference. Result has 112 places, 91 transitions, 655 flow [2024-06-21 16:45:22,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=655, PETRI_PLACES=112, PETRI_TRANSITIONS=91} [2024-06-21 16:45:22,812 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2024-06-21 16:45:22,812 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 91 transitions, 655 flow [2024-06-21 16:45:22,812 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 16:45:22,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:22,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:22,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:45:22,812 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 16:45:22,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:22,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1480342477, now seen corresponding path program 2 times [2024-06-21 16:45:22,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:22,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453918883] [2024-06-21 16:45:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:22,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:23,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:23,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453918883] [2024-06-21 16:45:23,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453918883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:23,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:23,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:45:23,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189700330] [2024-06-21 16:45:23,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:23,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:45:23,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:23,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:45:23,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:23,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:23,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 91 transitions, 655 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 16:45:23,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:23,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:23,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:23,957 INFO L124 PetriNetUnfolderBase]: 252/479 cut-off events. [2024-06-21 16:45:23,958 INFO L125 PetriNetUnfolderBase]: For 11179/11179 co-relation queries the response was YES. [2024-06-21 16:45:23,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2561 conditions, 479 events. 252/479 cut-off events. For 11179/11179 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2077 event pairs, 44 based on Foata normal form. 2/480 useless extension candidates. Maximal degree in co-relation 2507. Up to 381 conditions per place. [2024-06-21 16:45:23,961 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 84 selfloop transitions, 23 changer transitions 0/110 dead transitions. [2024-06-21 16:45:23,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 110 transitions, 999 flow [2024-06-21 16:45:23,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:23,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:23,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-21 16:45:23,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050179211469534 [2024-06-21 16:45:23,964 INFO L175 Difference]: Start difference. First operand has 112 places, 91 transitions, 655 flow. Second operand 9 states and 113 transitions. [2024-06-21 16:45:23,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 110 transitions, 999 flow [2024-06-21 16:45:23,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 110 transitions, 959 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 16:45:23,980 INFO L231 Difference]: Finished difference. Result has 114 places, 93 transitions, 691 flow [2024-06-21 16:45:23,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=691, PETRI_PLACES=114, PETRI_TRANSITIONS=93} [2024-06-21 16:45:23,980 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 84 predicate places. [2024-06-21 16:45:23,981 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 93 transitions, 691 flow [2024-06-21 16:45:23,981 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 16:45:23,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:23,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:23,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:45:23,982 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 16:45:23,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:23,982 INFO L85 PathProgramCache]: Analyzing trace with hash -983345815, now seen corresponding path program 3 times [2024-06-21 16:45:23,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:23,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025341355] [2024-06-21 16:45:23,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:23,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:24,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:24,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025341355] [2024-06-21 16:45:24,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025341355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:24,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:24,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:45:24,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848724639] [2024-06-21 16:45:24,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:24,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:45:24,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:24,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:45:24,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:24,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:24,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 93 transitions, 691 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 16:45:24,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:24,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:24,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:25,083 INFO L124 PetriNetUnfolderBase]: 249/474 cut-off events. [2024-06-21 16:45:25,083 INFO L125 PetriNetUnfolderBase]: For 11130/11130 co-relation queries the response was YES. [2024-06-21 16:45:25,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2511 conditions, 474 events. 249/474 cut-off events. For 11130/11130 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2041 event pairs, 45 based on Foata normal form. 2/475 useless extension candidates. Maximal degree in co-relation 2456. Up to 395 conditions per place. [2024-06-21 16:45:25,087 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 82 selfloop transitions, 23 changer transitions 0/108 dead transitions. [2024-06-21 16:45:25,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 108 transitions, 943 flow [2024-06-21 16:45:25,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-21 16:45:25,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942652329749104 [2024-06-21 16:45:25,089 INFO L175 Difference]: Start difference. First operand has 114 places, 93 transitions, 691 flow. Second operand 9 states and 110 transitions. [2024-06-21 16:45:25,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 108 transitions, 943 flow [2024-06-21 16:45:25,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 108 transitions, 896 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 16:45:25,110 INFO L231 Difference]: Finished difference. Result has 118 places, 93 transitions, 695 flow [2024-06-21 16:45:25,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=695, PETRI_PLACES=118, PETRI_TRANSITIONS=93} [2024-06-21 16:45:25,110 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2024-06-21 16:45:25,111 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 93 transitions, 695 flow [2024-06-21 16:45:25,111 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 16:45:25,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:25,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:25,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:45:25,111 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 16:45:25,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:25,112 INFO L85 PathProgramCache]: Analyzing trace with hash -896503903, now seen corresponding path program 1 times [2024-06-21 16:45:25,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:25,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305447851] [2024-06-21 16:45:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:25,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:26,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:26,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305447851] [2024-06-21 16:45:26,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305447851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:26,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:26,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:26,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909676191] [2024-06-21 16:45:26,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:26,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:26,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:26,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:26,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:26,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:26,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 93 transitions, 695 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 16:45:26,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:26,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:26,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:26,365 INFO L124 PetriNetUnfolderBase]: 247/471 cut-off events. [2024-06-21 16:45:26,365 INFO L125 PetriNetUnfolderBase]: For 10645/10645 co-relation queries the response was YES. [2024-06-21 16:45:26,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2480 conditions, 471 events. 247/471 cut-off events. For 10645/10645 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2008 event pairs, 44 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 2423. Up to 392 conditions per place. [2024-06-21 16:45:26,368 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 81 selfloop transitions, 26 changer transitions 0/110 dead transitions. [2024-06-21 16:45:26,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 110 transitions, 985 flow [2024-06-21 16:45:26,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:26,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:26,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 16:45:26,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 16:45:26,369 INFO L175 Difference]: Start difference. First operand has 118 places, 93 transitions, 695 flow. Second operand 10 states and 120 transitions. [2024-06-21 16:45:26,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 110 transitions, 985 flow [2024-06-21 16:45:26,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 110 transitions, 936 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:45:26,386 INFO L231 Difference]: Finished difference. Result has 120 places, 95 transitions, 741 flow [2024-06-21 16:45:26,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=741, PETRI_PLACES=120, PETRI_TRANSITIONS=95} [2024-06-21 16:45:26,386 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 90 predicate places. [2024-06-21 16:45:26,386 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 95 transitions, 741 flow [2024-06-21 16:45:26,386 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 16:45:26,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:26,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:26,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:45:26,387 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 16:45:26,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:26,387 INFO L85 PathProgramCache]: Analyzing trace with hash -917415919, now seen corresponding path program 4 times [2024-06-21 16:45:26,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:26,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108517810] [2024-06-21 16:45:26,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:26,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:27,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:27,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108517810] [2024-06-21 16:45:27,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108517810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:27,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:27,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:45:27,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035469826] [2024-06-21 16:45:27,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:27,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:45:27,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:27,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:45:27,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:27,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:27,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 95 transitions, 741 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 16:45:27,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:27,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:27,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:27,623 INFO L124 PetriNetUnfolderBase]: 254/488 cut-off events. [2024-06-21 16:45:27,623 INFO L125 PetriNetUnfolderBase]: For 11820/11820 co-relation queries the response was YES. [2024-06-21 16:45:27,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2586 conditions, 488 events. 254/488 cut-off events. For 11820/11820 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2127 event pairs, 46 based on Foata normal form. 2/489 useless extension candidates. Maximal degree in co-relation 2528. Up to 420 conditions per place. [2024-06-21 16:45:27,626 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 92 selfloop transitions, 18 changer transitions 0/113 dead transitions. [2024-06-21 16:45:27,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 113 transitions, 1040 flow [2024-06-21 16:45:27,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:27,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:27,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 16:45:27,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-21 16:45:27,627 INFO L175 Difference]: Start difference. First operand has 120 places, 95 transitions, 741 flow. Second operand 9 states and 109 transitions. [2024-06-21 16:45:27,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 113 transitions, 1040 flow [2024-06-21 16:45:27,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 113 transitions, 961 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 16:45:27,644 INFO L231 Difference]: Finished difference. Result has 122 places, 100 transitions, 754 flow [2024-06-21 16:45:27,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=754, PETRI_PLACES=122, PETRI_TRANSITIONS=100} [2024-06-21 16:45:27,644 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-06-21 16:45:27,645 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 100 transitions, 754 flow [2024-06-21 16:45:27,645 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 16:45:27,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:27,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:27,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:45:27,645 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 16:45:27,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:27,645 INFO L85 PathProgramCache]: Analyzing trace with hash -917563789, now seen corresponding path program 5 times [2024-06-21 16:45:27,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:27,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140085016] [2024-06-21 16:45:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:27,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:28,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:28,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140085016] [2024-06-21 16:45:28,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140085016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:28,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:28,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:45:28,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993321882] [2024-06-21 16:45:28,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:28,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:45:28,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:28,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:45:28,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:28,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:28,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 100 transitions, 754 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 16:45:28,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:28,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:28,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:28,786 INFO L124 PetriNetUnfolderBase]: 265/509 cut-off events. [2024-06-21 16:45:28,786 INFO L125 PetriNetUnfolderBase]: For 13929/13929 co-relation queries the response was YES. [2024-06-21 16:45:28,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2786 conditions, 509 events. 265/509 cut-off events. For 13929/13929 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2263 event pairs, 45 based on Foata normal form. 2/510 useless extension candidates. Maximal degree in co-relation 2726. Up to 418 conditions per place. [2024-06-21 16:45:28,789 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 94 selfloop transitions, 20 changer transitions 0/117 dead transitions. [2024-06-21 16:45:28,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 117 transitions, 1122 flow [2024-06-21 16:45:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:28,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:28,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 16:45:28,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 16:45:28,790 INFO L175 Difference]: Start difference. First operand has 122 places, 100 transitions, 754 flow. Second operand 9 states and 111 transitions. [2024-06-21 16:45:28,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 117 transitions, 1122 flow [2024-06-21 16:45:28,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 117 transitions, 1084 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 16:45:28,809 INFO L231 Difference]: Finished difference. Result has 127 places, 102 transitions, 794 flow [2024-06-21 16:45:28,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=794, PETRI_PLACES=127, PETRI_TRANSITIONS=102} [2024-06-21 16:45:28,810 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2024-06-21 16:45:28,810 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 102 transitions, 794 flow [2024-06-21 16:45:28,810 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 16:45:28,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:28,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:28,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:45:28,811 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 16:45:28,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:28,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1284592347, now seen corresponding path program 6 times [2024-06-21 16:45:28,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:28,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521678870] [2024-06-21 16:45:28,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:28,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:29,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:29,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521678870] [2024-06-21 16:45:29,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521678870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:29,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:29,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:45:29,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658604755] [2024-06-21 16:45:29,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:29,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:45:29,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:29,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:45:29,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:29,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:29,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 102 transitions, 794 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 16:45:29,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:29,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:29,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:30,015 INFO L124 PetriNetUnfolderBase]: 262/503 cut-off events. [2024-06-21 16:45:30,015 INFO L125 PetriNetUnfolderBase]: For 13389/13391 co-relation queries the response was YES. [2024-06-21 16:45:30,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 503 events. 262/503 cut-off events. For 13389/13391 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2238 event pairs, 48 based on Foata normal form. 2/504 useless extension candidates. Maximal degree in co-relation 2624. Up to 406 conditions per place. [2024-06-21 16:45:30,019 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 81 selfloop transitions, 30 changer transitions 0/114 dead transitions. [2024-06-21 16:45:30,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 114 transitions, 1046 flow [2024-06-21 16:45:30,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:30,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-21 16:45:30,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942652329749104 [2024-06-21 16:45:30,020 INFO L175 Difference]: Start difference. First operand has 127 places, 102 transitions, 794 flow. Second operand 9 states and 110 transitions. [2024-06-21 16:45:30,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 114 transitions, 1046 flow [2024-06-21 16:45:30,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 114 transitions, 998 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 16:45:30,051 INFO L231 Difference]: Finished difference. Result has 131 places, 102 transitions, 810 flow [2024-06-21 16:45:30,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=810, PETRI_PLACES=131, PETRI_TRANSITIONS=102} [2024-06-21 16:45:30,052 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2024-06-21 16:45:30,052 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 102 transitions, 810 flow [2024-06-21 16:45:30,052 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 16:45:30,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:30,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:30,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:45:30,053 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 16:45:30,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:30,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1284376866, now seen corresponding path program 1 times [2024-06-21 16:45:30,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:30,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648116035] [2024-06-21 16:45:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:30,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:31,051 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 16:45:31,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:31,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648116035] [2024-06-21 16:45:31,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648116035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:31,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:31,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:31,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974283912] [2024-06-21 16:45:31,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:31,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:31,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:31,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:31,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:31,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:31,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 102 transitions, 810 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 16:45:31,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:31,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:31,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:31,375 INFO L124 PetriNetUnfolderBase]: 268/516 cut-off events. [2024-06-21 16:45:31,376 INFO L125 PetriNetUnfolderBase]: For 14068/14068 co-relation queries the response was YES. [2024-06-21 16:45:31,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2769 conditions, 516 events. 268/516 cut-off events. For 14068/14068 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2319 event pairs, 45 based on Foata normal form. 2/517 useless extension candidates. Maximal degree in co-relation 2706. Up to 428 conditions per place. [2024-06-21 16:45:31,378 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 94 selfloop transitions, 23 changer transitions 0/120 dead transitions. [2024-06-21 16:45:31,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 120 transitions, 1136 flow [2024-06-21 16:45:31,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:31,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:31,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 16:45:31,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-21 16:45:31,385 INFO L175 Difference]: Start difference. First operand has 131 places, 102 transitions, 810 flow. Second operand 10 states and 122 transitions. [2024-06-21 16:45:31,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 120 transitions, 1136 flow [2024-06-21 16:45:31,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 120 transitions, 1073 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 16:45:31,416 INFO L231 Difference]: Finished difference. Result has 133 places, 105 transitions, 845 flow [2024-06-21 16:45:31,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=845, PETRI_PLACES=133, PETRI_TRANSITIONS=105} [2024-06-21 16:45:31,417 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 103 predicate places. [2024-06-21 16:45:31,417 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 105 transitions, 845 flow [2024-06-21 16:45:31,417 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 16:45:31,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:31,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:31,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:45:31,417 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 16:45:31,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:31,418 INFO L85 PathProgramCache]: Analyzing trace with hash -650706681, now seen corresponding path program 7 times [2024-06-21 16:45:31,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:31,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742515138] [2024-06-21 16:45:31,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:31,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:32,296 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 16:45:32,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:32,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742515138] [2024-06-21 16:45:32,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742515138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:32,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:32,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:45:32,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544107035] [2024-06-21 16:45:32,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:32,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:45:32,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:32,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:45:32,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:32,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:32,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 105 transitions, 845 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 16:45:32,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:32,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:32,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:32,669 INFO L124 PetriNetUnfolderBase]: 275/528 cut-off events. [2024-06-21 16:45:32,669 INFO L125 PetriNetUnfolderBase]: For 14909/14911 co-relation queries the response was YES. [2024-06-21 16:45:32,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2899 conditions, 528 events. 275/528 cut-off events. For 14909/14911 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2383 event pairs, 42 based on Foata normal form. 4/531 useless extension candidates. Maximal degree in co-relation 2836. Up to 432 conditions per place. [2024-06-21 16:45:32,672 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 91 selfloop transitions, 27 changer transitions 0/121 dead transitions. [2024-06-21 16:45:32,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 121 transitions, 1163 flow [2024-06-21 16:45:32,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:32,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:32,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 16:45:32,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 16:45:32,677 INFO L175 Difference]: Start difference. First operand has 133 places, 105 transitions, 845 flow. Second operand 9 states and 111 transitions. [2024-06-21 16:45:32,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 121 transitions, 1163 flow [2024-06-21 16:45:32,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 121 transitions, 1087 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 16:45:32,704 INFO L231 Difference]: Finished difference. Result has 135 places, 109 transitions, 878 flow [2024-06-21 16:45:32,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=878, PETRI_PLACES=135, PETRI_TRANSITIONS=109} [2024-06-21 16:45:32,705 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-06-21 16:45:32,705 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 109 transitions, 878 flow [2024-06-21 16:45:32,706 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 16:45:32,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:32,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:32,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:45:32,706 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 16:45:32,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:32,707 INFO L85 PathProgramCache]: Analyzing trace with hash -656069061, now seen corresponding path program 8 times [2024-06-21 16:45:32,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:32,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532081611] [2024-06-21 16:45:32,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:32,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:33,585 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 16:45:33,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:33,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532081611] [2024-06-21 16:45:33,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532081611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:33,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:33,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:45:33,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452745210] [2024-06-21 16:45:33,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:33,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:45:33,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:33,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:45:33,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:33,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:33,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 109 transitions, 878 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 16:45:33,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:33,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:33,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:33,967 INFO L124 PetriNetUnfolderBase]: 279/535 cut-off events. [2024-06-21 16:45:33,967 INFO L125 PetriNetUnfolderBase]: For 15912/15916 co-relation queries the response was YES. [2024-06-21 16:45:33,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2990 conditions, 535 events. 279/535 cut-off events. For 15912/15916 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2437 event pairs, 47 based on Foata normal form. 2/535 useless extension candidates. Maximal degree in co-relation 2925. Up to 410 conditions per place. [2024-06-21 16:45:33,970 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 80 selfloop transitions, 40 changer transitions 0/123 dead transitions. [2024-06-21 16:45:33,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 123 transitions, 1193 flow [2024-06-21 16:45:33,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:33,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:33,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 16:45:33,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 16:45:33,971 INFO L175 Difference]: Start difference. First operand has 135 places, 109 transitions, 878 flow. Second operand 9 states and 111 transitions. [2024-06-21 16:45:33,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 123 transitions, 1193 flow [2024-06-21 16:45:33,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 123 transitions, 1115 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:33,999 INFO L231 Difference]: Finished difference. Result has 139 places, 113 transitions, 946 flow [2024-06-21 16:45:33,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=946, PETRI_PLACES=139, PETRI_TRANSITIONS=113} [2024-06-21 16:45:34,000 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 109 predicate places. [2024-06-21 16:45:34,000 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 113 transitions, 946 flow [2024-06-21 16:45:34,000 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 16:45:34,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:34,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:34,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:45:34,001 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 16:45:34,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:34,001 INFO L85 PathProgramCache]: Analyzing trace with hash -456767271, now seen corresponding path program 9 times [2024-06-21 16:45:34,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:34,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347700981] [2024-06-21 16:45:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:34,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:34,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:34,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347700981] [2024-06-21 16:45:34,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347700981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:34,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:34,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:45:34,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134539137] [2024-06-21 16:45:34,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:34,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:45:34,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:34,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:45:34,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:34,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:34,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 113 transitions, 946 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 16:45:34,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:34,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:34,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:35,128 INFO L124 PetriNetUnfolderBase]: 283/544 cut-off events. [2024-06-21 16:45:35,128 INFO L125 PetriNetUnfolderBase]: For 16892/16894 co-relation queries the response was YES. [2024-06-21 16:45:35,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3101 conditions, 544 events. 283/544 cut-off events. For 16892/16894 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2490 event pairs, 44 based on Foata normal form. 4/547 useless extension candidates. Maximal degree in co-relation 3034. Up to 448 conditions per place. [2024-06-21 16:45:35,131 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 91 selfloop transitions, 31 changer transitions 0/125 dead transitions. [2024-06-21 16:45:35,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 125 transitions, 1242 flow [2024-06-21 16:45:35,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:35,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:35,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 16:45:35,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-21 16:45:35,132 INFO L175 Difference]: Start difference. First operand has 139 places, 113 transitions, 946 flow. Second operand 9 states and 109 transitions. [2024-06-21 16:45:35,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 125 transitions, 1242 flow [2024-06-21 16:45:35,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 125 transitions, 1157 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 16:45:35,164 INFO L231 Difference]: Finished difference. Result has 144 places, 114 transitions, 951 flow [2024-06-21 16:45:35,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=951, PETRI_PLACES=144, PETRI_TRANSITIONS=114} [2024-06-21 16:45:35,164 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 114 predicate places. [2024-06-21 16:45:35,164 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 114 transitions, 951 flow [2024-06-21 16:45:35,164 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 16:45:35,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:35,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:35,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:45:35,165 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 16:45:35,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:35,165 INFO L85 PathProgramCache]: Analyzing trace with hash -656216931, now seen corresponding path program 10 times [2024-06-21 16:45:35,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:35,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110220490] [2024-06-21 16:45:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:35,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:35,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:35,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110220490] [2024-06-21 16:45:35,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110220490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:35,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:35,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:45:35,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379142130] [2024-06-21 16:45:35,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:35,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:45:35,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:35,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:45:35,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:36,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:36,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 114 transitions, 951 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 16:45:36,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:36,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:36,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:36,259 INFO L124 PetriNetUnfolderBase]: 280/537 cut-off events. [2024-06-21 16:45:36,260 INFO L125 PetriNetUnfolderBase]: For 15732/15734 co-relation queries the response was YES. [2024-06-21 16:45:36,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2942 conditions, 537 events. 280/537 cut-off events. For 15732/15734 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2445 event pairs, 39 based on Foata normal form. 4/540 useless extension candidates. Maximal degree in co-relation 2874. Up to 417 conditions per place. [2024-06-21 16:45:36,263 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 90 selfloop transitions, 33 changer transitions 0/126 dead transitions. [2024-06-21 16:45:36,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 126 transitions, 1229 flow [2024-06-21 16:45:36,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:36,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:36,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 16:45:36,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 16:45:36,269 INFO L175 Difference]: Start difference. First operand has 144 places, 114 transitions, 951 flow. Second operand 9 states and 111 transitions. [2024-06-21 16:45:36,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 126 transitions, 1229 flow [2024-06-21 16:45:36,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 126 transitions, 1135 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 16:45:36,312 INFO L231 Difference]: Finished difference. Result has 145 places, 114 transitions, 927 flow [2024-06-21 16:45:36,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=927, PETRI_PLACES=145, PETRI_TRANSITIONS=114} [2024-06-21 16:45:36,312 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-06-21 16:45:36,313 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 114 transitions, 927 flow [2024-06-21 16:45:36,313 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 16:45:36,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:36,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:36,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:45:36,313 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 16:45:36,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:36,314 INFO L85 PathProgramCache]: Analyzing trace with hash -258916642, now seen corresponding path program 2 times [2024-06-21 16:45:36,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:36,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275019836] [2024-06-21 16:45:36,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:36,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:37,253 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 16:45:37,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:37,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275019836] [2024-06-21 16:45:37,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275019836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:37,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:37,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:37,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094045829] [2024-06-21 16:45:37,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:37,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:37,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:37,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:37,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:37,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:37,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 114 transitions, 927 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 16:45:37,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:37,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:37,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:37,589 INFO L124 PetriNetUnfolderBase]: 286/551 cut-off events. [2024-06-21 16:45:37,589 INFO L125 PetriNetUnfolderBase]: For 16455/16457 co-relation queries the response was YES. [2024-06-21 16:45:37,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2994 conditions, 551 events. 286/551 cut-off events. For 16455/16457 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2530 event pairs, 41 based on Foata normal form. 4/554 useless extension candidates. Maximal degree in co-relation 2926. Up to 375 conditions per place. [2024-06-21 16:45:37,593 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 86 selfloop transitions, 43 changer transitions 0/132 dead transitions. [2024-06-21 16:45:37,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 132 transitions, 1311 flow [2024-06-21 16:45:37,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:37,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 16:45:37,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-21 16:45:37,594 INFO L175 Difference]: Start difference. First operand has 145 places, 114 transitions, 927 flow. Second operand 10 states and 127 transitions. [2024-06-21 16:45:37,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 132 transitions, 1311 flow [2024-06-21 16:45:37,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 132 transitions, 1172 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-21 16:45:37,639 INFO L231 Difference]: Finished difference. Result has 145 places, 117 transitions, 934 flow [2024-06-21 16:45:37,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=934, PETRI_PLACES=145, PETRI_TRANSITIONS=117} [2024-06-21 16:45:37,640 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-06-21 16:45:37,640 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 117 transitions, 934 flow [2024-06-21 16:45:37,640 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 16:45:37,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:37,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:37,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:45:37,640 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 16:45:37,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:37,641 INFO L85 PathProgramCache]: Analyzing trace with hash -650491200, now seen corresponding path program 3 times [2024-06-21 16:45:37,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:37,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304008081] [2024-06-21 16:45:37,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:37,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:38,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:38,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304008081] [2024-06-21 16:45:38,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304008081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:38,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:38,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:38,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877962554] [2024-06-21 16:45:38,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:38,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:38,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:38,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:38,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:38,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:38,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 117 transitions, 934 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 16:45:38,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:38,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:38,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:38,861 INFO L124 PetriNetUnfolderBase]: 289/554 cut-off events. [2024-06-21 16:45:38,861 INFO L125 PetriNetUnfolderBase]: For 16213/16215 co-relation queries the response was YES. [2024-06-21 16:45:38,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2988 conditions, 554 events. 289/554 cut-off events. For 16213/16215 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2549 event pairs, 39 based on Foata normal form. 3/556 useless extension candidates. Maximal degree in co-relation 2921. Up to 449 conditions per place. [2024-06-21 16:45:38,865 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 109 selfloop transitions, 31 changer transitions 0/143 dead transitions. [2024-06-21 16:45:38,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 143 transitions, 1390 flow [2024-06-21 16:45:38,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:38,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:38,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 16:45:38,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-21 16:45:38,869 INFO L175 Difference]: Start difference. First operand has 145 places, 117 transitions, 934 flow. Second operand 10 states and 122 transitions. [2024-06-21 16:45:38,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 143 transitions, 1390 flow [2024-06-21 16:45:38,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 143 transitions, 1234 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 16:45:38,907 INFO L231 Difference]: Finished difference. Result has 150 places, 129 transitions, 1015 flow [2024-06-21 16:45:38,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1015, PETRI_PLACES=150, PETRI_TRANSITIONS=129} [2024-06-21 16:45:38,908 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 120 predicate places. [2024-06-21 16:45:38,908 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 129 transitions, 1015 flow [2024-06-21 16:45:38,908 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 16:45:38,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:38,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:38,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:45:38,909 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 16:45:38,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:38,909 INFO L85 PathProgramCache]: Analyzing trace with hash 6780638, now seen corresponding path program 4 times [2024-06-21 16:45:38,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:38,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659297336] [2024-06-21 16:45:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:38,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:39,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:39,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659297336] [2024-06-21 16:45:39,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659297336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:39,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:39,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:39,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376102172] [2024-06-21 16:45:39,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:39,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:39,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:39,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:39,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:39,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:39,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 129 transitions, 1015 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 16:45:39,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:39,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:39,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:40,245 INFO L124 PetriNetUnfolderBase]: 295/562 cut-off events. [2024-06-21 16:45:40,245 INFO L125 PetriNetUnfolderBase]: For 17763/17765 co-relation queries the response was YES. [2024-06-21 16:45:40,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3052 conditions, 562 events. 295/562 cut-off events. For 17763/17765 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2577 event pairs, 42 based on Foata normal form. 2/563 useless extension candidates. Maximal degree in co-relation 2981. Up to 505 conditions per place. [2024-06-21 16:45:40,249 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 122 selfloop transitions, 18 changer transitions 0/143 dead transitions. [2024-06-21 16:45:40,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 143 transitions, 1392 flow [2024-06-21 16:45:40,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:40,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 16:45:40,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-21 16:45:40,258 INFO L175 Difference]: Start difference. First operand has 150 places, 129 transitions, 1015 flow. Second operand 10 states and 116 transitions. [2024-06-21 16:45:40,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 143 transitions, 1392 flow [2024-06-21 16:45:40,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 143 transitions, 1282 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 16:45:40,307 INFO L231 Difference]: Finished difference. Result has 155 places, 132 transitions, 1020 flow [2024-06-21 16:45:40,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1020, PETRI_PLACES=155, PETRI_TRANSITIONS=132} [2024-06-21 16:45:40,310 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2024-06-21 16:45:40,310 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 132 transitions, 1020 flow [2024-06-21 16:45:40,310 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 16:45:40,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:40,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:40,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:45:40,311 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 16:45:40,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:40,311 INFO L85 PathProgramCache]: Analyzing trace with hash -2416132, now seen corresponding path program 5 times [2024-06-21 16:45:40,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:40,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732357664] [2024-06-21 16:45:40,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:40,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:41,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:41,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732357664] [2024-06-21 16:45:41,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732357664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:41,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:41,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:41,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439944173] [2024-06-21 16:45:41,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:41,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:41,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:41,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:41,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:41,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:41,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 132 transitions, 1020 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 16:45:41,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:41,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:41,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:41,604 INFO L124 PetriNetUnfolderBase]: 301/572 cut-off events. [2024-06-21 16:45:41,604 INFO L125 PetriNetUnfolderBase]: For 18224/18226 co-relation queries the response was YES. [2024-06-21 16:45:41,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3059 conditions, 572 events. 301/572 cut-off events. For 18224/18226 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2625 event pairs, 39 based on Foata normal form. 4/575 useless extension candidates. Maximal degree in co-relation 2987. Up to 400 conditions per place. [2024-06-21 16:45:41,607 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 91 selfloop transitions, 54 changer transitions 0/148 dead transitions. [2024-06-21 16:45:41,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 148 transitions, 1410 flow [2024-06-21 16:45:41,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:41,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:41,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-21 16:45:41,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-21 16:45:41,609 INFO L175 Difference]: Start difference. First operand has 155 places, 132 transitions, 1020 flow. Second operand 10 states and 126 transitions. [2024-06-21 16:45:41,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 148 transitions, 1410 flow [2024-06-21 16:45:41,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 148 transitions, 1335 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 16:45:41,643 INFO L231 Difference]: Finished difference. Result has 157 places, 135 transitions, 1122 flow [2024-06-21 16:45:41,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1122, PETRI_PLACES=157, PETRI_TRANSITIONS=135} [2024-06-21 16:45:41,643 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 127 predicate places. [2024-06-21 16:45:41,643 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 135 transitions, 1122 flow [2024-06-21 16:45:41,644 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 16:45:41,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:41,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:41,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:45:41,644 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 16:45:41,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:41,644 INFO L85 PathProgramCache]: Analyzing trace with hash 534459542, now seen corresponding path program 6 times [2024-06-21 16:45:41,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:41,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077162049] [2024-06-21 16:45:41,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:41,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:42,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:42,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077162049] [2024-06-21 16:45:42,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077162049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:42,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:42,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:42,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888455064] [2024-06-21 16:45:42,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:42,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:42,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:42,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:42,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:42,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:42,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 135 transitions, 1122 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 16:45:42,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:42,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:42,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:43,018 INFO L124 PetriNetUnfolderBase]: 299/567 cut-off events. [2024-06-21 16:45:43,018 INFO L125 PetriNetUnfolderBase]: For 16928/16930 co-relation queries the response was YES. [2024-06-21 16:45:43,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3076 conditions, 567 events. 299/567 cut-off events. For 16928/16930 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2584 event pairs, 42 based on Foata normal form. 1/567 useless extension candidates. Maximal degree in co-relation 3003. Up to 506 conditions per place. [2024-06-21 16:45:43,022 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 124 selfloop transitions, 22 changer transitions 0/149 dead transitions. [2024-06-21 16:45:43,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 149 transitions, 1475 flow [2024-06-21 16:45:43,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:45:43,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:45:43,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 16:45:43,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 16:45:43,023 INFO L175 Difference]: Start difference. First operand has 157 places, 135 transitions, 1122 flow. Second operand 11 states and 126 transitions. [2024-06-21 16:45:43,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 149 transitions, 1475 flow [2024-06-21 16:45:43,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 149 transitions, 1322 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 16:45:43,060 INFO L231 Difference]: Finished difference. Result has 160 places, 137 transitions, 1055 flow [2024-06-21 16:45:43,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1055, PETRI_PLACES=160, PETRI_TRANSITIONS=137} [2024-06-21 16:45:43,060 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2024-06-21 16:45:43,060 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 137 transitions, 1055 flow [2024-06-21 16:45:43,060 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 16:45:43,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:43,060 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 16:45:43,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:45:43,061 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 16:45:43,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:43,061 INFO L85 PathProgramCache]: Analyzing trace with hash -477156130, now seen corresponding path program 1 times [2024-06-21 16:45:43,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:43,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550033096] [2024-06-21 16:45:43,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:43,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:43,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:43,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550033096] [2024-06-21 16:45:43,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550033096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:43,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:43,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:43,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081558005] [2024-06-21 16:45:43,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:43,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:43,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:43,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:43,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:43,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:43,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 137 transitions, 1055 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 16:45:43,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:43,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:43,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:44,230 INFO L124 PetriNetUnfolderBase]: 303/576 cut-off events. [2024-06-21 16:45:44,230 INFO L125 PetriNetUnfolderBase]: For 18246/18246 co-relation queries the response was YES. [2024-06-21 16:45:44,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3025 conditions, 576 events. 303/576 cut-off events. For 18246/18246 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2648 event pairs, 20 based on Foata normal form. 2/577 useless extension candidates. Maximal degree in co-relation 2951. Up to 469 conditions per place. [2024-06-21 16:45:44,233 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 136 selfloop transitions, 18 changer transitions 0/157 dead transitions. [2024-06-21 16:45:44,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 157 transitions, 1421 flow [2024-06-21 16:45:44,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:44,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:44,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 16:45:44,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-21 16:45:44,235 INFO L175 Difference]: Start difference. First operand has 160 places, 137 transitions, 1055 flow. Second operand 10 states and 119 transitions. [2024-06-21 16:45:44,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 157 transitions, 1421 flow [2024-06-21 16:45:44,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 157 transitions, 1365 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 16:45:44,277 INFO L231 Difference]: Finished difference. Result has 161 places, 138 transitions, 1049 flow [2024-06-21 16:45:44,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1049, PETRI_PLACES=161, PETRI_TRANSITIONS=138} [2024-06-21 16:45:44,278 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 131 predicate places. [2024-06-21 16:45:44,278 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 138 transitions, 1049 flow [2024-06-21 16:45:44,278 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 16:45:44,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:44,278 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 16:45:44,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 16:45:44,278 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 16:45:44,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:44,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1800337524, now seen corresponding path program 2 times [2024-06-21 16:45:44,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:44,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346309857] [2024-06-21 16:45:44,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:44,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:45,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:45,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346309857] [2024-06-21 16:45:45,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346309857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:45,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:45,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:45,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784204724] [2024-06-21 16:45:45,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:45,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:45,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:45,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:45,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:45,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:45,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 138 transitions, 1049 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 16:45:45,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:45,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:45,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:45,354 INFO L124 PetriNetUnfolderBase]: 314/597 cut-off events. [2024-06-21 16:45:45,354 INFO L125 PetriNetUnfolderBase]: For 21198/21198 co-relation queries the response was YES. [2024-06-21 16:45:45,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3220 conditions, 597 events. 314/597 cut-off events. For 21198/21198 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2789 event pairs, 37 based on Foata normal form. 2/598 useless extension candidates. Maximal degree in co-relation 3145. Up to 474 conditions per place. [2024-06-21 16:45:45,357 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 132 selfloop transitions, 24 changer transitions 0/159 dead transitions. [2024-06-21 16:45:45,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 159 transitions, 1525 flow [2024-06-21 16:45:45,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 16:45:45,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 16:45:45,358 INFO L175 Difference]: Start difference. First operand has 161 places, 138 transitions, 1049 flow. Second operand 10 states and 125 transitions. [2024-06-21 16:45:45,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 159 transitions, 1525 flow [2024-06-21 16:45:45,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 159 transitions, 1485 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 16:45:45,402 INFO L231 Difference]: Finished difference. Result has 163 places, 140 transitions, 1083 flow [2024-06-21 16:45:45,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1009, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1083, PETRI_PLACES=163, PETRI_TRANSITIONS=140} [2024-06-21 16:45:45,403 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-06-21 16:45:45,403 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 140 transitions, 1083 flow [2024-06-21 16:45:45,403 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 16:45:45,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:45,403 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 16:45:45,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 16:45:45,403 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 16:45:45,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:45,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1795753554, now seen corresponding path program 3 times [2024-06-21 16:45:45,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:45,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212375683] [2024-06-21 16:45:45,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:45,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:46,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:46,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212375683] [2024-06-21 16:45:46,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212375683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:46,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:46,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:46,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450341899] [2024-06-21 16:45:46,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:46,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:46,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:46,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:46,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:46,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:46,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 140 transitions, 1083 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 16:45:46,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:46,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:46,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:46,499 INFO L124 PetriNetUnfolderBase]: 318/605 cut-off events. [2024-06-21 16:45:46,500 INFO L125 PetriNetUnfolderBase]: For 22386/22386 co-relation queries the response was YES. [2024-06-21 16:45:46,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3290 conditions, 605 events. 318/605 cut-off events. For 22386/22386 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2835 event pairs, 39 based on Foata normal form. 2/606 useless extension candidates. Maximal degree in co-relation 3214. Up to 502 conditions per place. [2024-06-21 16:45:46,504 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 131 selfloop transitions, 25 changer transitions 0/159 dead transitions. [2024-06-21 16:45:46,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 159 transitions, 1551 flow [2024-06-21 16:45:46,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:46,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:46,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 16:45:46,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 16:45:46,507 INFO L175 Difference]: Start difference. First operand has 163 places, 140 transitions, 1083 flow. Second operand 10 states and 123 transitions. [2024-06-21 16:45:46,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 159 transitions, 1551 flow [2024-06-21 16:45:46,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 159 transitions, 1510 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:46,555 INFO L231 Difference]: Finished difference. Result has 167 places, 141 transitions, 1108 flow [2024-06-21 16:45:46,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1108, PETRI_PLACES=167, PETRI_TRANSITIONS=141} [2024-06-21 16:45:46,556 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 137 predicate places. [2024-06-21 16:45:46,556 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 141 transitions, 1108 flow [2024-06-21 16:45:46,556 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 16:45:46,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:46,556 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 16:45:46,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 16:45:46,556 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 16:45:46,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:46,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1795575924, now seen corresponding path program 4 times [2024-06-21 16:45:46,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:46,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769166845] [2024-06-21 16:45:46,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:46,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:47,305 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 16:45:47,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:47,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769166845] [2024-06-21 16:45:47,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769166845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:47,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:47,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:47,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207380687] [2024-06-21 16:45:47,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:47,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:47,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:47,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:47,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:47,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:47,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 141 transitions, 1108 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 16:45:47,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:47,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:47,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:47,623 INFO L124 PetriNetUnfolderBase]: 315/600 cut-off events. [2024-06-21 16:45:47,623 INFO L125 PetriNetUnfolderBase]: For 20874/20874 co-relation queries the response was YES. [2024-06-21 16:45:47,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3212 conditions, 600 events. 315/600 cut-off events. For 20874/20874 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2798 event pairs, 40 based on Foata normal form. 2/601 useless extension candidates. Maximal degree in co-relation 3134. Up to 516 conditions per place. [2024-06-21 16:45:47,628 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 129 selfloop transitions, 25 changer transitions 0/157 dead transitions. [2024-06-21 16:45:47,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 157 transitions, 1460 flow [2024-06-21 16:45:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:47,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:47,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 16:45:47,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 16:45:47,630 INFO L175 Difference]: Start difference. First operand has 167 places, 141 transitions, 1108 flow. Second operand 10 states and 120 transitions. [2024-06-21 16:45:47,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 157 transitions, 1460 flow [2024-06-21 16:45:47,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 157 transitions, 1397 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 16:45:47,674 INFO L231 Difference]: Finished difference. Result has 169 places, 141 transitions, 1099 flow [2024-06-21 16:45:47,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1099, PETRI_PLACES=169, PETRI_TRANSITIONS=141} [2024-06-21 16:45:47,675 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 139 predicate places. [2024-06-21 16:45:47,675 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 141 transitions, 1099 flow [2024-06-21 16:45:47,675 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 16:45:47,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:47,675 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 16:45:47,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 16:45:47,675 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 16:45:47,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:47,675 INFO L85 PathProgramCache]: Analyzing trace with hash 2129913986, now seen corresponding path program 1 times [2024-06-21 16:45:47,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:47,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897017959] [2024-06-21 16:45:47,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:47,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:48,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:48,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897017959] [2024-06-21 16:45:48,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897017959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:48,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:48,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:45:48,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915611002] [2024-06-21 16:45:48,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:48,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:45:48,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:48,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:45:48,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:45:48,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:48,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 141 transitions, 1099 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:48,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:48,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:48,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:48,995 INFO L124 PetriNetUnfolderBase]: 318/607 cut-off events. [2024-06-21 16:45:48,996 INFO L125 PetriNetUnfolderBase]: For 20628/20628 co-relation queries the response was YES. [2024-06-21 16:45:48,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3262 conditions, 607 events. 318/607 cut-off events. For 20628/20628 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2840 event pairs, 39 based on Foata normal form. 1/607 useless extension candidates. Maximal degree in co-relation 3183. Up to 521 conditions per place. [2024-06-21 16:45:48,999 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 128 selfloop transitions, 28 changer transitions 0/159 dead transitions. [2024-06-21 16:45:48,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 159 transitions, 1505 flow [2024-06-21 16:45:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:45:49,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:45:49,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 16:45:49,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-21 16:45:49,001 INFO L175 Difference]: Start difference. First operand has 169 places, 141 transitions, 1099 flow. Second operand 11 states and 130 transitions. [2024-06-21 16:45:49,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 159 transitions, 1505 flow [2024-06-21 16:45:49,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 159 transitions, 1452 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 16:45:49,066 INFO L231 Difference]: Finished difference. Result has 171 places, 143 transitions, 1161 flow [2024-06-21 16:45:49,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1046, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1161, PETRI_PLACES=171, PETRI_TRANSITIONS=143} [2024-06-21 16:45:49,067 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2024-06-21 16:45:49,067 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 143 transitions, 1161 flow [2024-06-21 16:45:49,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:49,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:49,067 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 16:45:49,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 16:45:49,068 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 16:45:49,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:49,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2129312396, now seen corresponding path program 5 times [2024-06-21 16:45:49,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:49,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094618037] [2024-06-21 16:45:49,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:49,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:49,894 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 16:45:49,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:49,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094618037] [2024-06-21 16:45:49,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094618037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:49,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:49,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:49,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97064404] [2024-06-21 16:45:49,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:49,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:49,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:49,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:49,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:49,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:49,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 143 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 16:45:49,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:49,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:49,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:50,336 INFO L124 PetriNetUnfolderBase]: 325/620 cut-off events. [2024-06-21 16:45:50,336 INFO L125 PetriNetUnfolderBase]: For 22696/22696 co-relation queries the response was YES. [2024-06-21 16:45:50,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3358 conditions, 620 events. 325/620 cut-off events. For 22696/22696 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2929 event pairs, 41 based on Foata normal form. 2/621 useless extension candidates. Maximal degree in co-relation 3278. Up to 541 conditions per place. [2024-06-21 16:45:50,340 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 137 selfloop transitions, 22 changer transitions 0/162 dead transitions. [2024-06-21 16:45:50,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 162 transitions, 1556 flow [2024-06-21 16:45:50,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:50,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:50,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 16:45:50,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-21 16:45:50,342 INFO L175 Difference]: Start difference. First operand has 171 places, 143 transitions, 1161 flow. Second operand 10 states and 121 transitions. [2024-06-21 16:45:50,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 162 transitions, 1556 flow [2024-06-21 16:45:50,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 162 transitions, 1457 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 16:45:50,413 INFO L231 Difference]: Finished difference. Result has 173 places, 148 transitions, 1159 flow [2024-06-21 16:45:50,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1159, PETRI_PLACES=173, PETRI_TRANSITIONS=148} [2024-06-21 16:45:50,414 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 143 predicate places. [2024-06-21 16:45:50,414 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 148 transitions, 1159 flow [2024-06-21 16:45:50,414 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 16:45:50,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:50,414 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 16:45:50,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 16:45:50,414 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 16:45:50,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:50,415 INFO L85 PathProgramCache]: Analyzing trace with hash 2129134766, now seen corresponding path program 6 times [2024-06-21 16:45:50,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:50,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931104317] [2024-06-21 16:45:50,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:50,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:51,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:51,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:51,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931104317] [2024-06-21 16:45:51,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931104317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:51,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:51,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:51,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334370337] [2024-06-21 16:45:51,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:51,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:51,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:51,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:51,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:51,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:51,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 148 transitions, 1159 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 16:45:51,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:51,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:51,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:51,620 INFO L124 PetriNetUnfolderBase]: 329/628 cut-off events. [2024-06-21 16:45:51,621 INFO L125 PetriNetUnfolderBase]: For 23756/23756 co-relation queries the response was YES. [2024-06-21 16:45:51,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3376 conditions, 628 events. 329/628 cut-off events. For 23756/23756 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2968 event pairs, 41 based on Foata normal form. 2/629 useless extension candidates. Maximal degree in co-relation 3294. Up to 535 conditions per place. [2024-06-21 16:45:51,626 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 138 selfloop transitions, 23 changer transitions 0/164 dead transitions. [2024-06-21 16:45:51,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 164 transitions, 1535 flow [2024-06-21 16:45:51,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:51,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:51,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 16:45:51,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 16:45:51,627 INFO L175 Difference]: Start difference. First operand has 173 places, 148 transitions, 1159 flow. Second operand 10 states and 123 transitions. [2024-06-21 16:45:51,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 164 transitions, 1535 flow [2024-06-21 16:45:51,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 164 transitions, 1498 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 16:45:51,683 INFO L231 Difference]: Finished difference. Result has 178 places, 149 transitions, 1188 flow [2024-06-21 16:45:51,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1188, PETRI_PLACES=178, PETRI_TRANSITIONS=149} [2024-06-21 16:45:51,684 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2024-06-21 16:45:51,684 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 149 transitions, 1188 flow [2024-06-21 16:45:51,684 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 16:45:51,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:51,684 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 16:45:51,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 16:45:51,684 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 16:45:51,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:51,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1353429656, now seen corresponding path program 7 times [2024-06-21 16:45:51,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:51,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900570250] [2024-06-21 16:45:51,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:51,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:52,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:52,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900570250] [2024-06-21 16:45:52,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900570250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:52,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:52,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:52,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296446942] [2024-06-21 16:45:52,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:52,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:52,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:52,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:52,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:52,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:52,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 149 transitions, 1188 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 16:45:52,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:52,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:52,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:52,827 INFO L124 PetriNetUnfolderBase]: 340/649 cut-off events. [2024-06-21 16:45:52,827 INFO L125 PetriNetUnfolderBase]: For 27639/27639 co-relation queries the response was YES. [2024-06-21 16:45:52,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3618 conditions, 649 events. 340/649 cut-off events. For 27639/27639 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3121 event pairs, 42 based on Foata normal form. 2/650 useless extension candidates. Maximal degree in co-relation 3535. Up to 515 conditions per place. [2024-06-21 16:45:52,832 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 140 selfloop transitions, 25 changer transitions 0/168 dead transitions. [2024-06-21 16:45:52,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 168 transitions, 1700 flow [2024-06-21 16:45:52,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:52,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:52,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 16:45:52,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:45:52,833 INFO L175 Difference]: Start difference. First operand has 178 places, 149 transitions, 1188 flow. Second operand 10 states and 124 transitions. [2024-06-21 16:45:52,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 168 transitions, 1700 flow [2024-06-21 16:45:52,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 168 transitions, 1644 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 16:45:52,898 INFO L231 Difference]: Finished difference. Result has 180 places, 151 transitions, 1220 flow [2024-06-21 16:45:52,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1220, PETRI_PLACES=180, PETRI_TRANSITIONS=151} [2024-06-21 16:45:52,898 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 150 predicate places. [2024-06-21 16:45:52,898 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 151 transitions, 1220 flow [2024-06-21 16:45:52,898 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 16:45:52,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:52,898 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 16:45:52,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 16:45:52,899 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 16:45:52,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:52,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1564869504, now seen corresponding path program 8 times [2024-06-21 16:45:52,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:52,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095379405] [2024-06-21 16:45:52,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:52,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:53,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:53,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095379405] [2024-06-21 16:45:53,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095379405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:53,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:53,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:53,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84335193] [2024-06-21 16:45:53,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:53,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:53,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:53,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:53,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:53,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:53,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 151 transitions, 1220 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 16:45:53,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:53,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:53,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:54,258 INFO L124 PetriNetUnfolderBase]: 347/664 cut-off events. [2024-06-21 16:45:54,258 INFO L125 PetriNetUnfolderBase]: For 28763/28763 co-relation queries the response was YES. [2024-06-21 16:45:54,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3714 conditions, 664 events. 347/664 cut-off events. For 28763/28763 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3215 event pairs, 48 based on Foata normal form. 2/665 useless extension candidates. Maximal degree in co-relation 3630. Up to 582 conditions per place. [2024-06-21 16:45:54,263 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 141 selfloop transitions, 24 changer transitions 0/168 dead transitions. [2024-06-21 16:45:54,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 168 transitions, 1625 flow [2024-06-21 16:45:54,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:54,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:54,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 16:45:54,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-21 16:45:54,264 INFO L175 Difference]: Start difference. First operand has 180 places, 151 transitions, 1220 flow. Second operand 10 states and 121 transitions. [2024-06-21 16:45:54,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 168 transitions, 1625 flow [2024-06-21 16:45:54,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 168 transitions, 1573 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:54,329 INFO L231 Difference]: Finished difference. Result has 184 places, 154 transitions, 1259 flow [2024-06-21 16:45:54,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1259, PETRI_PLACES=184, PETRI_TRANSITIONS=154} [2024-06-21 16:45:54,330 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 154 predicate places. [2024-06-21 16:45:54,330 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 154 transitions, 1259 flow [2024-06-21 16:45:54,330 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 16:45:54,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:54,330 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 16:45:54,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 16:45:54,331 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 16:45:54,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:54,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1791112196, now seen corresponding path program 9 times [2024-06-21 16:45:54,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:54,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035011152] [2024-06-21 16:45:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:54,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:55,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:55,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035011152] [2024-06-21 16:45:55,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035011152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:55,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:55,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:55,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508421497] [2024-06-21 16:45:55,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:55,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:55,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:55,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:55,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:55,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:55,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 154 transitions, 1259 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 16:45:55,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:55,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:55,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:55,556 INFO L124 PetriNetUnfolderBase]: 351/671 cut-off events. [2024-06-21 16:45:55,557 INFO L125 PetriNetUnfolderBase]: For 29716/29718 co-relation queries the response was YES. [2024-06-21 16:45:55,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3772 conditions, 671 events. 351/671 cut-off events. For 29716/29718 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3272 event pairs, 48 based on Foata normal form. 2/672 useless extension candidates. Maximal degree in co-relation 3686. Up to 532 conditions per place. [2024-06-21 16:45:55,562 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 129 selfloop transitions, 38 changer transitions 0/170 dead transitions. [2024-06-21 16:45:55,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 170 transitions, 1755 flow [2024-06-21 16:45:55,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:55,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 16:45:55,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:45:55,563 INFO L175 Difference]: Start difference. First operand has 184 places, 154 transitions, 1259 flow. Second operand 10 states and 124 transitions. [2024-06-21 16:45:55,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 170 transitions, 1755 flow [2024-06-21 16:45:55,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 170 transitions, 1706 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:55,640 INFO L231 Difference]: Finished difference. Result has 188 places, 155 transitions, 1306 flow [2024-06-21 16:45:55,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1306, PETRI_PLACES=188, PETRI_TRANSITIONS=155} [2024-06-21 16:45:55,641 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2024-06-21 16:45:55,641 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 155 transitions, 1306 flow [2024-06-21 16:45:55,641 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 16:45:55,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:55,641 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 16:45:55,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 16:45:55,641 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 16:45:55,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:55,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1797545936, now seen corresponding path program 10 times [2024-06-21 16:45:55,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:55,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8219326] [2024-06-21 16:45:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:55,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:56,495 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 16:45:56,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:56,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8219326] [2024-06-21 16:45:56,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8219326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:56,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:56,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:56,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769537847] [2024-06-21 16:45:56,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:56,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:56,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:56,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:56,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:56,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:56,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 155 transitions, 1306 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 16:45:56,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:56,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:56,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:56,880 INFO L124 PetriNetUnfolderBase]: 348/666 cut-off events. [2024-06-21 16:45:56,880 INFO L125 PetriNetUnfolderBase]: For 27707/27709 co-relation queries the response was YES. [2024-06-21 16:45:56,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3679 conditions, 666 events. 348/666 cut-off events. For 27707/27709 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3241 event pairs, 49 based on Foata normal form. 2/667 useless extension candidates. Maximal degree in co-relation 3592. Up to 550 conditions per place. [2024-06-21 16:45:56,885 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 126 selfloop transitions, 39 changer transitions 0/168 dead transitions. [2024-06-21 16:45:56,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 168 transitions, 1668 flow [2024-06-21 16:45:56,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:56,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 16:45:56,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-21 16:45:56,886 INFO L175 Difference]: Start difference. First operand has 188 places, 155 transitions, 1306 flow. Second operand 10 states and 121 transitions. [2024-06-21 16:45:56,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 168 transitions, 1668 flow [2024-06-21 16:45:56,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 168 transitions, 1566 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 16:45:56,949 INFO L231 Difference]: Finished difference. Result has 190 places, 155 transitions, 1286 flow [2024-06-21 16:45:56,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1204, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1286, PETRI_PLACES=190, PETRI_TRANSITIONS=155} [2024-06-21 16:45:56,949 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 160 predicate places. [2024-06-21 16:45:56,950 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 155 transitions, 1286 flow [2024-06-21 16:45:56,950 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 16:45:56,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:56,950 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 16:45:56,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 16:45:56,950 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 16:45:56,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:56,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1797792200, now seen corresponding path program 1 times [2024-06-21 16:45:56,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:56,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563712039] [2024-06-21 16:45:56,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:56,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:57,803 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 16:45:57,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:57,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563712039] [2024-06-21 16:45:57,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563712039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:57,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:57,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:45:57,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861332565] [2024-06-21 16:45:57,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:57,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:45:57,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:57,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:45:57,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:45:57,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:57,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 155 transitions, 1286 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:57,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:57,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:57,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:58,250 INFO L124 PetriNetUnfolderBase]: 352/675 cut-off events. [2024-06-21 16:45:58,250 INFO L125 PetriNetUnfolderBase]: For 28512/28512 co-relation queries the response was YES. [2024-06-21 16:45:58,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3694 conditions, 675 events. 352/675 cut-off events. For 28512/28512 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3289 event pairs, 47 based on Foata normal form. 2/676 useless extension candidates. Maximal degree in co-relation 3606. Up to 605 conditions per place. [2024-06-21 16:45:58,254 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 150 selfloop transitions, 19 changer transitions 0/172 dead transitions. [2024-06-21 16:45:58,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 172 transitions, 1684 flow [2024-06-21 16:45:58,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:45:58,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:45:58,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 16:45:58,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 16:45:58,255 INFO L175 Difference]: Start difference. First operand has 190 places, 155 transitions, 1286 flow. Second operand 11 states and 127 transitions. [2024-06-21 16:45:58,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 172 transitions, 1684 flow [2024-06-21 16:45:58,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 172 transitions, 1603 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 16:45:58,321 INFO L231 Difference]: Finished difference. Result has 193 places, 157 transitions, 1274 flow [2024-06-21 16:45:58,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1274, PETRI_PLACES=193, PETRI_TRANSITIONS=157} [2024-06-21 16:45:58,322 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 163 predicate places. [2024-06-21 16:45:58,322 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 157 transitions, 1274 flow [2024-06-21 16:45:58,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:58,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:58,322 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 16:45:58,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 16:45:58,322 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 16:45:58,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:58,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1571544548, now seen corresponding path program 2 times [2024-06-21 16:45:58,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:58,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138922330] [2024-06-21 16:45:58,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:58,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:59,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:59,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138922330] [2024-06-21 16:45:59,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138922330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:59,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:59,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:45:59,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588652709] [2024-06-21 16:45:59,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:59,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:45:59,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:59,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:45:59,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:45:59,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:45:59,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 157 transitions, 1274 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:59,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:59,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:45:59,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:59,806 INFO L124 PetriNetUnfolderBase]: 358/687 cut-off events. [2024-06-21 16:45:59,806 INFO L125 PetriNetUnfolderBase]: For 28008/28008 co-relation queries the response was YES. [2024-06-21 16:45:59,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3761 conditions, 687 events. 358/687 cut-off events. For 28008/28008 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3394 event pairs, 47 based on Foata normal form. 1/687 useless extension candidates. Maximal degree in co-relation 3672. Up to 585 conditions per place. [2024-06-21 16:45:59,811 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 138 selfloop transitions, 35 changer transitions 0/176 dead transitions. [2024-06-21 16:45:59,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 176 transitions, 1728 flow [2024-06-21 16:45:59,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:45:59,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:45:59,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 16:45:59,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-21 16:45:59,812 INFO L175 Difference]: Start difference. First operand has 193 places, 157 transitions, 1274 flow. Second operand 12 states and 142 transitions. [2024-06-21 16:45:59,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 176 transitions, 1728 flow [2024-06-21 16:45:59,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 176 transitions, 1608 flow, removed 8 selfloop flow, removed 14 redundant places. [2024-06-21 16:45:59,890 INFO L231 Difference]: Finished difference. Result has 191 places, 161 transitions, 1301 flow [2024-06-21 16:45:59,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1301, PETRI_PLACES=191, PETRI_TRANSITIONS=161} [2024-06-21 16:45:59,890 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 161 predicate places. [2024-06-21 16:45:59,891 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 161 transitions, 1301 flow [2024-06-21 16:45:59,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:59,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:59,891 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 16:45:59,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 16:45:59,891 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 16:45:59,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:59,892 INFO L85 PathProgramCache]: Analyzing trace with hash 416464128, now seen corresponding path program 11 times [2024-06-21 16:45:59,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:59,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504014011] [2024-06-21 16:45:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:59,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:00,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:00,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504014011] [2024-06-21 16:46:00,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504014011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:00,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:00,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:46:00,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189502709] [2024-06-21 16:46:00,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:00,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:46:00,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:00,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:46:00,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:46:00,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:00,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 161 transitions, 1301 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 16:46:00,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:00,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:00,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:01,247 INFO L124 PetriNetUnfolderBase]: 372/713 cut-off events. [2024-06-21 16:46:01,247 INFO L125 PetriNetUnfolderBase]: For 34330/34334 co-relation queries the response was YES. [2024-06-21 16:46:01,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4018 conditions, 713 events. 372/713 cut-off events. For 34330/34334 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3552 event pairs, 54 based on Foata normal form. 2/713 useless extension candidates. Maximal degree in co-relation 3929. Up to 522 conditions per place. [2024-06-21 16:46:01,252 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 123 selfloop transitions, 55 changer transitions 0/181 dead transitions. [2024-06-21 16:46:01,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 181 transitions, 1877 flow [2024-06-21 16:46:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:46:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:46:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 16:46:01,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-21 16:46:01,253 INFO L175 Difference]: Start difference. First operand has 191 places, 161 transitions, 1301 flow. Second operand 10 states and 127 transitions. [2024-06-21 16:46:01,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 181 transitions, 1877 flow [2024-06-21 16:46:01,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 181 transitions, 1760 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 16:46:01,333 INFO L231 Difference]: Finished difference. Result has 193 places, 168 transitions, 1385 flow [2024-06-21 16:46:01,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1385, PETRI_PLACES=193, PETRI_TRANSITIONS=168} [2024-06-21 16:46:01,334 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 163 predicate places. [2024-06-21 16:46:01,334 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 168 transitions, 1385 flow [2024-06-21 16:46:01,334 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 16:46:01,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:01,334 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 16:46:01,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 16:46:01,334 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 16:46:01,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:01,335 INFO L85 PathProgramCache]: Analyzing trace with hash 421110408, now seen corresponding path program 12 times [2024-06-21 16:46:01,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:01,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582989409] [2024-06-21 16:46:01,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:01,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:02,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:02,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582989409] [2024-06-21 16:46:02,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582989409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:02,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:02,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:46:02,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930068672] [2024-06-21 16:46:02,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:02,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:46:02,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:02,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:46:02,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:46:02,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:02,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 168 transitions, 1385 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 16:46:02,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:02,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:02,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:02,614 INFO L124 PetriNetUnfolderBase]: 369/708 cut-off events. [2024-06-21 16:46:02,614 INFO L125 PetriNetUnfolderBase]: For 31704/31708 co-relation queries the response was YES. [2024-06-21 16:46:02,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3923 conditions, 708 events. 369/708 cut-off events. For 31704/31708 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3533 event pairs, 55 based on Foata normal form. 2/708 useless extension candidates. Maximal degree in co-relation 3832. Up to 534 conditions per place. [2024-06-21 16:46:02,620 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 122 selfloop transitions, 54 changer transitions 0/179 dead transitions. [2024-06-21 16:46:02,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 179 transitions, 1763 flow [2024-06-21 16:46:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:46:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:46:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 16:46:02,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:46:02,621 INFO L175 Difference]: Start difference. First operand has 193 places, 168 transitions, 1385 flow. Second operand 10 states and 124 transitions. [2024-06-21 16:46:02,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 179 transitions, 1763 flow [2024-06-21 16:46:02,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 179 transitions, 1684 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 16:46:02,695 INFO L231 Difference]: Finished difference. Result has 199 places, 168 transitions, 1418 flow [2024-06-21 16:46:02,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1306, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1418, PETRI_PLACES=199, PETRI_TRANSITIONS=168} [2024-06-21 16:46:02,696 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 169 predicate places. [2024-06-21 16:46:02,696 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 168 transitions, 1418 flow [2024-06-21 16:46:02,696 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 16:46:02,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:02,696 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 16:46:02,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 16:46:02,696 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 16:46:02,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:02,697 INFO L85 PathProgramCache]: Analyzing trace with hash -415593682, now seen corresponding path program 13 times [2024-06-21 16:46:02,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:02,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881824790] [2024-06-21 16:46:02,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:02,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:03,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:03,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881824790] [2024-06-21 16:46:03,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881824790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:03,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:03,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:46:03,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116823280] [2024-06-21 16:46:03,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:03,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:46:03,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:03,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:46:03,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:46:03,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:03,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 168 transitions, 1418 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 16:46:03,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:03,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:03,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:03,923 INFO L124 PetriNetUnfolderBase]: 373/718 cut-off events. [2024-06-21 16:46:03,924 INFO L125 PetriNetUnfolderBase]: For 32690/32694 co-relation queries the response was YES. [2024-06-21 16:46:03,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4020 conditions, 718 events. 373/718 cut-off events. For 32690/32694 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3620 event pairs, 51 based on Foata normal form. 2/718 useless extension candidates. Maximal degree in co-relation 3928. Up to 473 conditions per place. [2024-06-21 16:46:03,929 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 123 selfloop transitions, 57 changer transitions 0/183 dead transitions. [2024-06-21 16:46:03,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 183 transitions, 1952 flow [2024-06-21 16:46:03,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:46:03,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:46:03,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 16:46:03,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-21 16:46:03,930 INFO L175 Difference]: Start difference. First operand has 199 places, 168 transitions, 1418 flow. Second operand 10 states and 127 transitions. [2024-06-21 16:46:03,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 183 transitions, 1952 flow [2024-06-21 16:46:04,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 183 transitions, 1841 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 16:46:04,011 INFO L231 Difference]: Finished difference. Result has 200 places, 169 transitions, 1445 flow [2024-06-21 16:46:04,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1445, PETRI_PLACES=200, PETRI_TRANSITIONS=169} [2024-06-21 16:46:04,012 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2024-06-21 16:46:04,012 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 169 transitions, 1445 flow [2024-06-21 16:46:04,012 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 16:46:04,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:04,012 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 16:46:04,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 16:46:04,013 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 16:46:04,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:04,013 INFO L85 PathProgramCache]: Analyzing trace with hash -275098228, now seen corresponding path program 14 times [2024-06-21 16:46:04,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:04,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637365881] [2024-06-21 16:46:04,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:04,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:04,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:04,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637365881] [2024-06-21 16:46:04,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637365881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:04,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:04,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:46:04,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104791031] [2024-06-21 16:46:04,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:04,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:46:04,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:04,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:46:04,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:46:05,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:05,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 169 transitions, 1445 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 16:46:05,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:05,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:05,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:05,391 INFO L124 PetriNetUnfolderBase]: 380/733 cut-off events. [2024-06-21 16:46:05,392 INFO L125 PetriNetUnfolderBase]: For 33962/33966 co-relation queries the response was YES. [2024-06-21 16:46:05,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4144 conditions, 733 events. 380/733 cut-off events. For 33962/33966 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3750 event pairs, 55 based on Foata normal form. 2/733 useless extension candidates. Maximal degree in co-relation 4051. Up to 554 conditions per place. [2024-06-21 16:46:05,397 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 122 selfloop transitions, 58 changer transitions 0/183 dead transitions. [2024-06-21 16:46:05,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 183 transitions, 1874 flow [2024-06-21 16:46:05,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:46:05,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:46:05,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 16:46:05,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 16:46:05,398 INFO L175 Difference]: Start difference. First operand has 200 places, 169 transitions, 1445 flow. Second operand 10 states and 123 transitions. [2024-06-21 16:46:05,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 183 transitions, 1874 flow [2024-06-21 16:46:05,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 183 transitions, 1715 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 16:46:05,476 INFO L231 Difference]: Finished difference. Result has 201 places, 172 transitions, 1451 flow [2024-06-21 16:46:05,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1451, PETRI_PLACES=201, PETRI_TRANSITIONS=172} [2024-06-21 16:46:05,477 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2024-06-21 16:46:05,477 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 172 transitions, 1451 flow [2024-06-21 16:46:05,477 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 16:46:05,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:05,478 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 16:46:05,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 16:46:05,478 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 16:46:05,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:05,478 INFO L85 PathProgramCache]: Analyzing trace with hash -244771282, now seen corresponding path program 15 times [2024-06-21 16:46:05,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:05,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85530895] [2024-06-21 16:46:05,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:05,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:06,352 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 16:46:06,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:06,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85530895] [2024-06-21 16:46:06,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85530895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:06,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:06,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:46:06,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434630132] [2024-06-21 16:46:06,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:06,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:46:06,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:06,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:46:06,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:46:06,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:06,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 172 transitions, 1451 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 16:46:06,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:06,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:06,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:06,792 INFO L124 PetriNetUnfolderBase]: 387/746 cut-off events. [2024-06-21 16:46:06,792 INFO L125 PetriNetUnfolderBase]: For 34817/34821 co-relation queries the response was YES. [2024-06-21 16:46:06,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4109 conditions, 746 events. 387/746 cut-off events. For 34817/34821 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3824 event pairs, 55 based on Foata normal form. 2/746 useless extension candidates. Maximal degree in co-relation 4017. Up to 566 conditions per place. [2024-06-21 16:46:06,800 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 127 selfloop transitions, 56 changer transitions 0/186 dead transitions. [2024-06-21 16:46:06,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 186 transitions, 1882 flow [2024-06-21 16:46:06,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:46:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:46:06,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-21 16:46:06,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-21 16:46:06,801 INFO L175 Difference]: Start difference. First operand has 201 places, 172 transitions, 1451 flow. Second operand 10 states and 126 transitions. [2024-06-21 16:46:06,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 186 transitions, 1882 flow [2024-06-21 16:46:06,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 186 transitions, 1723 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 16:46:06,897 INFO L231 Difference]: Finished difference. Result has 204 places, 175 transitions, 1449 flow [2024-06-21 16:46:06,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1449, PETRI_PLACES=204, PETRI_TRANSITIONS=175} [2024-06-21 16:46:06,897 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 174 predicate places. [2024-06-21 16:46:06,897 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 175 transitions, 1449 flow [2024-06-21 16:46:06,897 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 16:46:06,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:06,897 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 16:46:06,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 16:46:06,898 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 16:46:06,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:06,898 INFO L85 PathProgramCache]: Analyzing trace with hash -238342192, now seen corresponding path program 16 times [2024-06-21 16:46:06,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:06,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106187880] [2024-06-21 16:46:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:06,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:07,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:07,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106187880] [2024-06-21 16:46:07,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106187880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:07,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:07,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:46:07,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823658596] [2024-06-21 16:46:07,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:07,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:46:07,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:07,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:46:07,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:46:07,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:07,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 175 transitions, 1449 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 16:46:07,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:07,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:07,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:08,152 INFO L124 PetriNetUnfolderBase]: 391/754 cut-off events. [2024-06-21 16:46:08,153 INFO L125 PetriNetUnfolderBase]: For 35846/35850 co-relation queries the response was YES. [2024-06-21 16:46:08,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4079 conditions, 754 events. 391/754 cut-off events. For 35846/35850 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3872 event pairs, 57 based on Foata normal form. 2/754 useless extension candidates. Maximal degree in co-relation 3987. Up to 574 conditions per place. [2024-06-21 16:46:08,157 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 127 selfloop transitions, 57 changer transitions 0/187 dead transitions. [2024-06-21 16:46:08,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 187 transitions, 1862 flow [2024-06-21 16:46:08,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:46:08,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:46:08,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 16:46:08,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 16:46:08,158 INFO L175 Difference]: Start difference. First operand has 204 places, 175 transitions, 1449 flow. Second operand 10 states and 125 transitions. [2024-06-21 16:46:08,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 187 transitions, 1862 flow [2024-06-21 16:46:08,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 187 transitions, 1728 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 16:46:08,240 INFO L231 Difference]: Finished difference. Result has 207 places, 176 transitions, 1454 flow [2024-06-21 16:46:08,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1454, PETRI_PLACES=207, PETRI_TRANSITIONS=176} [2024-06-21 16:46:08,241 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 177 predicate places. [2024-06-21 16:46:08,241 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 176 transitions, 1454 flow [2024-06-21 16:46:08,241 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 16:46:08,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:08,241 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 16:46:08,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 16:46:08,241 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 16:46:08,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:08,242 INFO L85 PathProgramCache]: Analyzing trace with hash -244775932, now seen corresponding path program 17 times [2024-06-21 16:46:08,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:08,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257298557] [2024-06-21 16:46:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:08,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:09,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:09,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257298557] [2024-06-21 16:46:09,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257298557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:09,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:09,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:46:09,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12125696] [2024-06-21 16:46:09,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:09,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:46:09,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:09,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:46:09,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:46:09,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:09,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 176 transitions, 1454 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 16:46:09,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:09,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:09,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:09,450 INFO L124 PetriNetUnfolderBase]: 395/762 cut-off events. [2024-06-21 16:46:09,450 INFO L125 PetriNetUnfolderBase]: For 36912/36916 co-relation queries the response was YES. [2024-06-21 16:46:09,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4127 conditions, 762 events. 395/762 cut-off events. For 36912/36916 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 3944 event pairs, 57 based on Foata normal form. 2/762 useless extension candidates. Maximal degree in co-relation 4034. Up to 562 conditions per place. [2024-06-21 16:46:09,455 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 128 selfloop transitions, 58 changer transitions 0/189 dead transitions. [2024-06-21 16:46:09,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 189 transitions, 1875 flow [2024-06-21 16:46:09,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:46:09,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:46:09,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 16:46:09,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-21 16:46:09,456 INFO L175 Difference]: Start difference. First operand has 207 places, 176 transitions, 1454 flow. Second operand 10 states and 127 transitions. [2024-06-21 16:46:09,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 189 transitions, 1875 flow [2024-06-21 16:46:09,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 189 transitions, 1734 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 16:46:09,538 INFO L231 Difference]: Finished difference. Result has 208 places, 177 transitions, 1456 flow [2024-06-21 16:46:09,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1456, PETRI_PLACES=208, PETRI_TRANSITIONS=177} [2024-06-21 16:46:09,539 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2024-06-21 16:46:09,539 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 177 transitions, 1456 flow [2024-06-21 16:46:09,539 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 16:46:09,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:09,539 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 16:46:09,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 16:46:09,539 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 16:46:09,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:09,540 INFO L85 PathProgramCache]: Analyzing trace with hash -275102878, now seen corresponding path program 18 times [2024-06-21 16:46:09,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:09,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830964165] [2024-06-21 16:46:09,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:09,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:10,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:10,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830964165] [2024-06-21 16:46:10,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830964165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:10,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:10,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:46:10,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912300561] [2024-06-21 16:46:10,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:10,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:46:10,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:10,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:46:10,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:46:10,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:10,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 177 transitions, 1456 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 16:46:10,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:10,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:10,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:10,883 INFO L124 PetriNetUnfolderBase]: 399/770 cut-off events. [2024-06-21 16:46:10,883 INFO L125 PetriNetUnfolderBase]: For 38180/38184 co-relation queries the response was YES. [2024-06-21 16:46:10,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4179 conditions, 770 events. 399/770 cut-off events. For 38180/38184 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 3988 event pairs, 57 based on Foata normal form. 2/770 useless extension candidates. Maximal degree in co-relation 4085. Up to 565 conditions per place. [2024-06-21 16:46:10,888 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 126 selfloop transitions, 62 changer transitions 0/191 dead transitions. [2024-06-21 16:46:10,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 191 transitions, 2017 flow [2024-06-21 16:46:10,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:46:10,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:46:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 16:46:10,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 16:46:10,889 INFO L175 Difference]: Start difference. First operand has 208 places, 177 transitions, 1456 flow. Second operand 10 states and 125 transitions. [2024-06-21 16:46:10,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 191 transitions, 2017 flow [2024-06-21 16:46:10,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 191 transitions, 1885 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 16:46:10,985 INFO L231 Difference]: Finished difference. Result has 210 places, 178 transitions, 1475 flow [2024-06-21 16:46:10,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1475, PETRI_PLACES=210, PETRI_TRANSITIONS=178} [2024-06-21 16:46:10,985 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 180 predicate places. [2024-06-21 16:46:10,986 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 178 transitions, 1475 flow [2024-06-21 16:46:10,986 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 16:46:10,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:10,986 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 16:46:10,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 16:46:10,986 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 16:46:10,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:10,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1478812222, now seen corresponding path program 19 times [2024-06-21 16:46:10,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:10,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145589462] [2024-06-21 16:46:10,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:10,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:11,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:11,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145589462] [2024-06-21 16:46:11,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145589462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:11,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:11,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:46:11,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70967929] [2024-06-21 16:46:11,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:11,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:46:11,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:11,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:46:11,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:46:12,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:12,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 178 transitions, 1475 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 16:46:12,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:12,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:12,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:12,384 INFO L124 PetriNetUnfolderBase]: 403/778 cut-off events. [2024-06-21 16:46:12,384 INFO L125 PetriNetUnfolderBase]: For 39424/39428 co-relation queries the response was YES. [2024-06-21 16:46:12,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4239 conditions, 778 events. 403/778 cut-off events. For 39424/39428 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4052 event pairs, 59 based on Foata normal form. 2/778 useless extension candidates. Maximal degree in co-relation 4144. Up to 598 conditions per place. [2024-06-21 16:46:12,389 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 128 selfloop transitions, 60 changer transitions 0/191 dead transitions. [2024-06-21 16:46:12,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 191 transitions, 1914 flow [2024-06-21 16:46:12,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:46:12,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:46:12,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 16:46:12,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:46:12,390 INFO L175 Difference]: Start difference. First operand has 210 places, 178 transitions, 1475 flow. Second operand 10 states and 124 transitions. [2024-06-21 16:46:12,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 191 transitions, 1914 flow [2024-06-21 16:46:12,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 191 transitions, 1712 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 16:46:12,478 INFO L231 Difference]: Finished difference. Result has 212 places, 180 transitions, 1444 flow [2024-06-21 16:46:12,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1279, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1444, PETRI_PLACES=212, PETRI_TRANSITIONS=180} [2024-06-21 16:46:12,478 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 182 predicate places. [2024-06-21 16:46:12,479 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 180 transitions, 1444 flow [2024-06-21 16:46:12,479 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 16:46:12,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:12,479 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 16:46:12,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 16:46:12,479 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 16:46:12,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:12,479 INFO L85 PathProgramCache]: Analyzing trace with hash -907087920, now seen corresponding path program 20 times [2024-06-21 16:46:12,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:12,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460476488] [2024-06-21 16:46:12,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:12,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:13,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:13,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460476488] [2024-06-21 16:46:13,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460476488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:13,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:13,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:46:13,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45348333] [2024-06-21 16:46:13,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:13,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:46:13,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:13,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:46:13,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:46:13,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:13,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 180 transitions, 1444 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 16:46:13,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:13,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:13,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:13,689 INFO L124 PetriNetUnfolderBase]: 400/777 cut-off events. [2024-06-21 16:46:13,689 INFO L125 PetriNetUnfolderBase]: For 35666/35670 co-relation queries the response was YES. [2024-06-21 16:46:13,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3950 conditions, 777 events. 400/777 cut-off events. For 35666/35670 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4074 event pairs, 58 based on Foata normal form. 2/777 useless extension candidates. Maximal degree in co-relation 3854. Up to 593 conditions per place. [2024-06-21 16:46:13,695 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 120 selfloop transitions, 68 changer transitions 0/191 dead transitions. [2024-06-21 16:46:13,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 191 transitions, 1846 flow [2024-06-21 16:46:13,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:46:13,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:46:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 16:46:13,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-21 16:46:13,696 INFO L175 Difference]: Start difference. First operand has 212 places, 180 transitions, 1444 flow. Second operand 10 states and 122 transitions. [2024-06-21 16:46:13,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 191 transitions, 1846 flow [2024-06-21 16:46:13,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 191 transitions, 1694 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 16:46:13,775 INFO L231 Difference]: Finished difference. Result has 215 places, 180 transitions, 1432 flow [2024-06-21 16:46:13,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1432, PETRI_PLACES=215, PETRI_TRANSITIONS=180} [2024-06-21 16:46:13,775 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 185 predicate places. [2024-06-21 16:46:13,775 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 180 transitions, 1432 flow [2024-06-21 16:46:13,775 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 16:46:13,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:13,775 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 16:46:13,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 16:46:13,776 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 16:46:13,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:13,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1890480812, now seen corresponding path program 3 times [2024-06-21 16:46:13,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:13,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935431864] [2024-06-21 16:46:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:13,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:14,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:14,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935431864] [2024-06-21 16:46:14,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935431864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:14,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:14,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:15,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896327770] [2024-06-21 16:46:15,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:15,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:15,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:15,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:15,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:15,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:15,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 180 transitions, 1432 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:15,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:15,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:15,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:15,591 INFO L124 PetriNetUnfolderBase]: 406/788 cut-off events. [2024-06-21 16:46:15,591 INFO L125 PetriNetUnfolderBase]: For 34114/34116 co-relation queries the response was YES. [2024-06-21 16:46:15,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4001 conditions, 788 events. 406/788 cut-off events. For 34114/34116 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4147 event pairs, 53 based on Foata normal form. 3/790 useless extension candidates. Maximal degree in co-relation 3904. Up to 588 conditions per place. [2024-06-21 16:46:15,596 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 133 selfloop transitions, 60 changer transitions 0/196 dead transitions. [2024-06-21 16:46:15,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 196 transitions, 1918 flow [2024-06-21 16:46:15,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:15,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:15,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 16:46:15,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 16:46:15,597 INFO L175 Difference]: Start difference. First operand has 215 places, 180 transitions, 1432 flow. Second operand 11 states and 136 transitions. [2024-06-21 16:46:15,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 196 transitions, 1918 flow [2024-06-21 16:46:15,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 196 transitions, 1692 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 16:46:15,693 INFO L231 Difference]: Finished difference. Result has 214 places, 184 transitions, 1403 flow [2024-06-21 16:46:15,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1403, PETRI_PLACES=214, PETRI_TRANSITIONS=184} [2024-06-21 16:46:15,694 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 184 predicate places. [2024-06-21 16:46:15,694 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 184 transitions, 1403 flow [2024-06-21 16:46:15,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:15,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:15,695 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 16:46:15,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 16:46:15,695 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 16:46:15,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:15,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1830467250, now seen corresponding path program 4 times [2024-06-21 16:46:15,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:15,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587140258] [2024-06-21 16:46:15,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:15,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:16,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:16,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587140258] [2024-06-21 16:46:16,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587140258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:16,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:16,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:16,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009305919] [2024-06-21 16:46:16,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:16,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:16,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:16,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:16,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:17,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:17,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 184 transitions, 1403 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:17,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:17,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:17,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:17,420 INFO L124 PetriNetUnfolderBase]: 412/795 cut-off events. [2024-06-21 16:46:17,420 INFO L125 PetriNetUnfolderBase]: For 35423/35427 co-relation queries the response was YES. [2024-06-21 16:46:17,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4005 conditions, 795 events. 412/795 cut-off events. For 35423/35427 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4173 event pairs, 58 based on Foata normal form. 1/794 useless extension candidates. Maximal degree in co-relation 3909. Up to 559 conditions per place. [2024-06-21 16:46:17,425 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 127 selfloop transitions, 69 changer transitions 0/199 dead transitions. [2024-06-21 16:46:17,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 199 transitions, 1897 flow [2024-06-21 16:46:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-21 16:46:17,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41055718475073316 [2024-06-21 16:46:17,426 INFO L175 Difference]: Start difference. First operand has 214 places, 184 transitions, 1403 flow. Second operand 11 states and 140 transitions. [2024-06-21 16:46:17,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 199 transitions, 1897 flow [2024-06-21 16:46:17,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 199 transitions, 1726 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-21 16:46:17,517 INFO L231 Difference]: Finished difference. Result has 216 places, 188 transitions, 1455 flow [2024-06-21 16:46:17,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1455, PETRI_PLACES=216, PETRI_TRANSITIONS=188} [2024-06-21 16:46:17,517 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2024-06-21 16:46:17,517 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 188 transitions, 1455 flow [2024-06-21 16:46:17,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:17,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:17,518 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 16:46:17,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 16:46:17,518 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 16:46:17,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:17,518 INFO L85 PathProgramCache]: Analyzing trace with hash -238335248, now seen corresponding path program 5 times [2024-06-21 16:46:17,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:17,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703603535] [2024-06-21 16:46:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:17,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:18,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:18,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703603535] [2024-06-21 16:46:18,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703603535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:18,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:18,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:18,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549528719] [2024-06-21 16:46:18,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:18,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:18,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:18,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:18,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:18,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:18,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 188 transitions, 1455 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:18,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:18,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:18,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:19,089 INFO L124 PetriNetUnfolderBase]: 418/809 cut-off events. [2024-06-21 16:46:19,089 INFO L125 PetriNetUnfolderBase]: For 36716/36720 co-relation queries the response was YES. [2024-06-21 16:46:19,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4080 conditions, 809 events. 418/809 cut-off events. For 36716/36720 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4287 event pairs, 58 based on Foata normal form. 1/808 useless extension candidates. Maximal degree in co-relation 3985. Up to 568 conditions per place. [2024-06-21 16:46:19,094 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 128 selfloop transitions, 72 changer transitions 0/203 dead transitions. [2024-06-21 16:46:19,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 203 transitions, 1961 flow [2024-06-21 16:46:19,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:19,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 16:46:19,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-21 16:46:19,095 INFO L175 Difference]: Start difference. First operand has 216 places, 188 transitions, 1455 flow. Second operand 11 states and 139 transitions. [2024-06-21 16:46:19,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 203 transitions, 1961 flow [2024-06-21 16:46:19,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 203 transitions, 1779 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 16:46:19,197 INFO L231 Difference]: Finished difference. Result has 220 places, 192 transitions, 1506 flow [2024-06-21 16:46:19,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1506, PETRI_PLACES=220, PETRI_TRANSITIONS=192} [2024-06-21 16:46:19,198 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 190 predicate places. [2024-06-21 16:46:19,198 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 192 transitions, 1506 flow [2024-06-21 16:46:19,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:19,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:19,198 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 16:46:19,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 16:46:19,198 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 16:46:19,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:19,199 INFO L85 PathProgramCache]: Analyzing trace with hash -906841966, now seen corresponding path program 6 times [2024-06-21 16:46:19,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:19,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385204540] [2024-06-21 16:46:19,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:19,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:20,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:20,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385204540] [2024-06-21 16:46:20,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385204540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:20,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:20,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:20,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179374362] [2024-06-21 16:46:20,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:20,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:20,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:20,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:20,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:20,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:20,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 192 transitions, 1506 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:20,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:20,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:20,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:20,542 INFO L124 PetriNetUnfolderBase]: 421/816 cut-off events. [2024-06-21 16:46:20,543 INFO L125 PetriNetUnfolderBase]: For 37848/37852 co-relation queries the response was YES. [2024-06-21 16:46:20,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4148 conditions, 816 events. 421/816 cut-off events. For 37848/37852 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4361 event pairs, 58 based on Foata normal form. 1/815 useless extension candidates. Maximal degree in co-relation 4052. Up to 567 conditions per place. [2024-06-21 16:46:20,547 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 119 selfloop transitions, 85 changer transitions 0/207 dead transitions. [2024-06-21 16:46:20,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 207 transitions, 2022 flow [2024-06-21 16:46:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 16:46:20,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40175953079178883 [2024-06-21 16:46:20,548 INFO L175 Difference]: Start difference. First operand has 220 places, 192 transitions, 1506 flow. Second operand 11 states and 137 transitions. [2024-06-21 16:46:20,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 207 transitions, 2022 flow [2024-06-21 16:46:20,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 207 transitions, 1820 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-21 16:46:20,641 INFO L231 Difference]: Finished difference. Result has 223 places, 194 transitions, 1551 flow [2024-06-21 16:46:20,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1304, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1551, PETRI_PLACES=223, PETRI_TRANSITIONS=194} [2024-06-21 16:46:20,642 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 193 predicate places. [2024-06-21 16:46:20,642 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 194 transitions, 1551 flow [2024-06-21 16:46:20,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:20,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:20,642 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 16:46:20,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 16:46:20,643 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 16:46:20,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:20,643 INFO L85 PathProgramCache]: Analyzing trace with hash -906841656, now seen corresponding path program 2 times [2024-06-21 16:46:20,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:20,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601043741] [2024-06-21 16:46:20,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:20,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:21,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:21,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601043741] [2024-06-21 16:46:21,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601043741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:21,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:21,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:21,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954422639] [2024-06-21 16:46:21,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:21,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:21,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:21,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:21,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:21,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:21,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 194 transitions, 1551 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:21,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:21,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:21,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:21,898 INFO L124 PetriNetUnfolderBase]: 425/827 cut-off events. [2024-06-21 16:46:21,898 INFO L125 PetriNetUnfolderBase]: For 41190/41192 co-relation queries the response was YES. [2024-06-21 16:46:21,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4205 conditions, 827 events. 425/827 cut-off events. For 41190/41192 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4445 event pairs, 55 based on Foata normal form. 4/830 useless extension candidates. Maximal degree in co-relation 4108. Up to 698 conditions per place. [2024-06-21 16:46:21,903 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 168 selfloop transitions, 40 changer transitions 0/211 dead transitions. [2024-06-21 16:46:21,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 211 transitions, 2039 flow [2024-06-21 16:46:21,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:21,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:21,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 16:46:21,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-21 16:46:21,904 INFO L175 Difference]: Start difference. First operand has 223 places, 194 transitions, 1551 flow. Second operand 11 states and 130 transitions. [2024-06-21 16:46:21,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 211 transitions, 2039 flow [2024-06-21 16:46:22,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 211 transitions, 1806 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-21 16:46:22,009 INFO L231 Difference]: Finished difference. Result has 226 places, 198 transitions, 1447 flow [2024-06-21 16:46:22,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1447, PETRI_PLACES=226, PETRI_TRANSITIONS=198} [2024-06-21 16:46:22,009 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 196 predicate places. [2024-06-21 16:46:22,010 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 198 transitions, 1447 flow [2024-06-21 16:46:22,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:22,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:22,010 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 16:46:22,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 16:46:22,010 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 16:46:22,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:22,010 INFO L85 PathProgramCache]: Analyzing trace with hash -510863062, now seen corresponding path program 3 times [2024-06-21 16:46:22,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:22,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078684841] [2024-06-21 16:46:22,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:22,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:22,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:22,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078684841] [2024-06-21 16:46:22,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078684841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:22,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:22,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:22,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188983988] [2024-06-21 16:46:22,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:22,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:22,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:22,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:22,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:23,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:23,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 198 transitions, 1447 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:23,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:23,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:23,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:23,429 INFO L124 PetriNetUnfolderBase]: 465/903 cut-off events. [2024-06-21 16:46:23,429 INFO L125 PetriNetUnfolderBase]: For 73337/73339 co-relation queries the response was YES. [2024-06-21 16:46:23,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5445 conditions, 903 events. 465/903 cut-off events. For 73337/73339 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4865 event pairs, 68 based on Foata normal form. 2/904 useless extension candidates. Maximal degree in co-relation 5346. Up to 734 conditions per place. [2024-06-21 16:46:23,435 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 192 selfloop transitions, 24 changer transitions 0/219 dead transitions. [2024-06-21 16:46:23,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 219 transitions, 2185 flow [2024-06-21 16:46:23,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:46:23,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:46:23,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 16:46:23,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-21 16:46:23,436 INFO L175 Difference]: Start difference. First operand has 226 places, 198 transitions, 1447 flow. Second operand 12 states and 142 transitions. [2024-06-21 16:46:23,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 219 transitions, 2185 flow [2024-06-21 16:46:23,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 219 transitions, 2117 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:46:23,598 INFO L231 Difference]: Finished difference. Result has 233 places, 200 transitions, 1473 flow [2024-06-21 16:46:23,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1473, PETRI_PLACES=233, PETRI_TRANSITIONS=200} [2024-06-21 16:46:23,599 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 203 predicate places. [2024-06-21 16:46:23,599 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 200 transitions, 1473 flow [2024-06-21 16:46:23,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:23,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:23,599 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 16:46:23,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 16:46:23,600 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 16:46:23,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:23,600 INFO L85 PathProgramCache]: Analyzing trace with hash -284914250, now seen corresponding path program 4 times [2024-06-21 16:46:23,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:23,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360673400] [2024-06-21 16:46:23,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:23,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:24,518 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 16:46:24,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:24,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360673400] [2024-06-21 16:46:24,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360673400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:24,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:24,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:24,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523121343] [2024-06-21 16:46:24,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:24,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:24,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:24,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:24,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:24,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:24,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 200 transitions, 1473 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:24,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:24,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:24,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:24,958 INFO L124 PetriNetUnfolderBase]: 469/909 cut-off events. [2024-06-21 16:46:24,958 INFO L125 PetriNetUnfolderBase]: For 75340/75342 co-relation queries the response was YES. [2024-06-21 16:46:24,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5494 conditions, 909 events. 469/909 cut-off events. For 75340/75342 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4882 event pairs, 70 based on Foata normal form. 2/910 useless extension candidates. Maximal degree in co-relation 5394. Up to 838 conditions per place. [2024-06-21 16:46:24,966 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 194 selfloop transitions, 17 changer transitions 0/214 dead transitions. [2024-06-21 16:46:24,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 214 transitions, 1953 flow [2024-06-21 16:46:24,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:24,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 16:46:24,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 16:46:24,967 INFO L175 Difference]: Start difference. First operand has 233 places, 200 transitions, 1473 flow. Second operand 11 states and 124 transitions. [2024-06-21 16:46:24,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 214 transitions, 1953 flow [2024-06-21 16:46:25,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 214 transitions, 1896 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 16:46:25,155 INFO L231 Difference]: Finished difference. Result has 237 places, 202 transitions, 1491 flow [2024-06-21 16:46:25,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1421, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1491, PETRI_PLACES=237, PETRI_TRANSITIONS=202} [2024-06-21 16:46:25,155 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 207 predicate places. [2024-06-21 16:46:25,155 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 202 transitions, 1491 flow [2024-06-21 16:46:25,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:25,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:25,156 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 16:46:25,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 16:46:25,156 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 16:46:25,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:25,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2063201342, now seen corresponding path program 7 times [2024-06-21 16:46:25,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:25,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815216127] [2024-06-21 16:46:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:25,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:26,029 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 16:46:26,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:26,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815216127] [2024-06-21 16:46:26,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815216127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:26,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:26,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:26,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635487097] [2024-06-21 16:46:26,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:26,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:26,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:26,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:26,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:26,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:26,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 202 transitions, 1491 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:26,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:26,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:26,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:26,394 INFO L124 PetriNetUnfolderBase]: 472/918 cut-off events. [2024-06-21 16:46:26,394 INFO L125 PetriNetUnfolderBase]: For 75577/75579 co-relation queries the response was YES. [2024-06-21 16:46:26,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5583 conditions, 918 events. 472/918 cut-off events. For 75577/75579 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5005 event pairs, 69 based on Foata normal form. 3/920 useless extension candidates. Maximal degree in co-relation 5480. Up to 712 conditions per place. [2024-06-21 16:46:26,400 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 150 selfloop transitions, 63 changer transitions 0/216 dead transitions. [2024-06-21 16:46:26,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 216 transitions, 2021 flow [2024-06-21 16:46:26,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:26,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:26,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 16:46:26,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40175953079178883 [2024-06-21 16:46:26,401 INFO L175 Difference]: Start difference. First operand has 237 places, 202 transitions, 1491 flow. Second operand 11 states and 137 transitions. [2024-06-21 16:46:26,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 216 transitions, 2021 flow [2024-06-21 16:46:26,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 216 transitions, 1973 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 16:46:26,575 INFO L231 Difference]: Finished difference. Result has 240 places, 204 transitions, 1650 flow [2024-06-21 16:46:26,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1443, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1650, PETRI_PLACES=240, PETRI_TRANSITIONS=204} [2024-06-21 16:46:26,576 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 210 predicate places. [2024-06-21 16:46:26,576 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 204 transitions, 1650 flow [2024-06-21 16:46:26,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:26,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:26,577 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 16:46:26,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 16:46:26,577 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 16:46:26,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:26,577 INFO L85 PathProgramCache]: Analyzing trace with hash -611622766, now seen corresponding path program 8 times [2024-06-21 16:46:26,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:26,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069051130] [2024-06-21 16:46:26,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:26,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:27,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:27,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069051130] [2024-06-21 16:46:27,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069051130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:27,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:27,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:27,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415211907] [2024-06-21 16:46:27,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:27,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:27,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:27,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:27,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:27,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:27,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 204 transitions, 1650 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:27,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:27,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:27,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:28,057 INFO L124 PetriNetUnfolderBase]: 480/931 cut-off events. [2024-06-21 16:46:28,057 INFO L125 PetriNetUnfolderBase]: For 81863/81865 co-relation queries the response was YES. [2024-06-21 16:46:28,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5989 conditions, 931 events. 480/931 cut-off events. For 81863/81865 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5052 event pairs, 70 based on Foata normal form. 1/931 useless extension candidates. Maximal degree in co-relation 5885. Up to 843 conditions per place. [2024-06-21 16:46:28,066 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 192 selfloop transitions, 26 changer transitions 0/221 dead transitions. [2024-06-21 16:46:28,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 221 transitions, 2422 flow [2024-06-21 16:46:28,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:46:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:46:28,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-21 16:46:28,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 16:46:28,068 INFO L175 Difference]: Start difference. First operand has 240 places, 204 transitions, 1650 flow. Second operand 12 states and 138 transitions. [2024-06-21 16:46:28,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 221 transitions, 2422 flow [2024-06-21 16:46:28,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 221 transitions, 2215 flow, removed 34 selfloop flow, removed 10 redundant places. [2024-06-21 16:46:28,266 INFO L231 Difference]: Finished difference. Result has 242 places, 208 transitions, 1656 flow [2024-06-21 16:46:28,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1443, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1656, PETRI_PLACES=242, PETRI_TRANSITIONS=208} [2024-06-21 16:46:28,266 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 212 predicate places. [2024-06-21 16:46:28,266 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 208 transitions, 1656 flow [2024-06-21 16:46:28,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:28,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:28,266 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 16:46:28,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 16:46:28,267 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 16:46:28,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:28,267 INFO L85 PathProgramCache]: Analyzing trace with hash -238096238, now seen corresponding path program 9 times [2024-06-21 16:46:28,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:28,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336606910] [2024-06-21 16:46:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:28,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:29,169 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 16:46:29,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:29,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336606910] [2024-06-21 16:46:29,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336606910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:29,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:29,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:29,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830147621] [2024-06-21 16:46:29,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:29,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:29,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:29,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:29,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:29,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:29,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 208 transitions, 1656 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:29,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:29,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:29,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:29,589 INFO L124 PetriNetUnfolderBase]: 483/939 cut-off events. [2024-06-21 16:46:29,590 INFO L125 PetriNetUnfolderBase]: For 84411/84415 co-relation queries the response was YES. [2024-06-21 16:46:29,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5990 conditions, 939 events. 483/939 cut-off events. For 84411/84415 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5130 event pairs, 74 based on Foata normal form. 1/938 useless extension candidates. Maximal degree in co-relation 5885. Up to 677 conditions per place. [2024-06-21 16:46:29,597 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 135 selfloop transitions, 83 changer transitions 0/221 dead transitions. [2024-06-21 16:46:29,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 221 transitions, 2198 flow [2024-06-21 16:46:29,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:29,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:29,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 16:46:29,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-21 16:46:29,598 INFO L175 Difference]: Start difference. First operand has 242 places, 208 transitions, 1656 flow. Second operand 11 states and 139 transitions. [2024-06-21 16:46:29,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 221 transitions, 2198 flow [2024-06-21 16:46:29,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 221 transitions, 2090 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-21 16:46:29,795 INFO L231 Difference]: Finished difference. Result has 245 places, 210 transitions, 1803 flow [2024-06-21 16:46:29,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1803, PETRI_PLACES=245, PETRI_TRANSITIONS=210} [2024-06-21 16:46:29,795 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 215 predicate places. [2024-06-21 16:46:29,795 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 210 transitions, 1803 flow [2024-06-21 16:46:29,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:29,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:29,796 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 16:46:29,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 16:46:29,796 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 16:46:29,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:29,796 INFO L85 PathProgramCache]: Analyzing trace with hash 593846562, now seen corresponding path program 5 times [2024-06-21 16:46:29,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:29,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291517834] [2024-06-21 16:46:29,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:29,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:30,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:30,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291517834] [2024-06-21 16:46:30,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291517834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:30,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:30,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:30,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135130403] [2024-06-21 16:46:30,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:30,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:30,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:30,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:30,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:30,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:30,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 210 transitions, 1803 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:30,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:30,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:30,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:31,196 INFO L124 PetriNetUnfolderBase]: 487/948 cut-off events. [2024-06-21 16:46:31,196 INFO L125 PetriNetUnfolderBase]: For 89576/89578 co-relation queries the response was YES. [2024-06-21 16:46:31,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6181 conditions, 948 events. 487/948 cut-off events. For 89576/89578 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5196 event pairs, 69 based on Foata normal form. 4/951 useless extension candidates. Maximal degree in co-relation 6074. Up to 817 conditions per place. [2024-06-21 16:46:31,207 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 184 selfloop transitions, 37 changer transitions 0/224 dead transitions. [2024-06-21 16:46:31,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 224 transitions, 2301 flow [2024-06-21 16:46:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:31,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:31,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 16:46:31,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 16:46:31,209 INFO L175 Difference]: Start difference. First operand has 245 places, 210 transitions, 1803 flow. Second operand 11 states and 132 transitions. [2024-06-21 16:46:31,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 224 transitions, 2301 flow [2024-06-21 16:46:31,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 224 transitions, 2062 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-21 16:46:31,427 INFO L231 Difference]: Finished difference. Result has 247 places, 211 transitions, 1666 flow [2024-06-21 16:46:31,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1666, PETRI_PLACES=247, PETRI_TRANSITIONS=211} [2024-06-21 16:46:31,427 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 217 predicate places. [2024-06-21 16:46:31,428 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 211 transitions, 1666 flow [2024-06-21 16:46:31,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:31,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:31,428 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 16:46:31,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 16:46:31,428 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 16:46:31,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:31,429 INFO L85 PathProgramCache]: Analyzing trace with hash -621742096, now seen corresponding path program 10 times [2024-06-21 16:46:31,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:31,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673499974] [2024-06-21 16:46:31,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:31,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:32,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:32,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673499974] [2024-06-21 16:46:32,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673499974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:32,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:32,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:32,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579255880] [2024-06-21 16:46:32,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:32,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:32,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:32,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:32,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:32,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:32,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 211 transitions, 1666 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:32,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:32,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:32,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:32,874 INFO L124 PetriNetUnfolderBase]: 485/943 cut-off events. [2024-06-21 16:46:32,875 INFO L125 PetriNetUnfolderBase]: For 84384/84386 co-relation queries the response was YES. [2024-06-21 16:46:32,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5928 conditions, 943 events. 485/943 cut-off events. For 84384/84386 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5151 event pairs, 70 based on Foata normal form. 1/943 useless extension candidates. Maximal degree in co-relation 5820. Up to 863 conditions per place. [2024-06-21 16:46:32,882 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 198 selfloop transitions, 21 changer transitions 0/222 dead transitions. [2024-06-21 16:46:32,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 222 transitions, 2130 flow [2024-06-21 16:46:32,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:32,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:32,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 16:46:32,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 16:46:32,883 INFO L175 Difference]: Start difference. First operand has 247 places, 211 transitions, 1666 flow. Second operand 11 states and 126 transitions. [2024-06-21 16:46:32,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 222 transitions, 2130 flow [2024-06-21 16:46:33,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 222 transitions, 1976 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-06-21 16:46:33,132 INFO L231 Difference]: Finished difference. Result has 249 places, 211 transitions, 1559 flow [2024-06-21 16:46:33,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1512, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1559, PETRI_PLACES=249, PETRI_TRANSITIONS=211} [2024-06-21 16:46:33,133 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 219 predicate places. [2024-06-21 16:46:33,133 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 211 transitions, 1559 flow [2024-06-21 16:46:33,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:33,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:33,133 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 16:46:33,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 16:46:33,133 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 16:46:33,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:33,133 INFO L85 PathProgramCache]: Analyzing trace with hash -268422874, now seen corresponding path program 6 times [2024-06-21 16:46:33,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:33,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514980974] [2024-06-21 16:46:33,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:33,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:34,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:34,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514980974] [2024-06-21 16:46:34,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514980974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:34,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:34,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:34,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083228869] [2024-06-21 16:46:34,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:34,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:34,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:34,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:34,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:34,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:34,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 211 transitions, 1559 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:34,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:34,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:34,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:34,548 INFO L124 PetriNetUnfolderBase]: 482/940 cut-off events. [2024-06-21 16:46:34,549 INFO L125 PetriNetUnfolderBase]: For 82302/82304 co-relation queries the response was YES. [2024-06-21 16:46:34,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5631 conditions, 940 events. 482/940 cut-off events. For 82302/82304 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5163 event pairs, 68 based on Foata normal form. 4/943 useless extension candidates. Maximal degree in co-relation 5522. Up to 809 conditions per place. [2024-06-21 16:46:34,560 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 184 selfloop transitions, 38 changer transitions 0/225 dead transitions. [2024-06-21 16:46:34,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 225 transitions, 2041 flow [2024-06-21 16:46:34,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:34,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:34,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-21 16:46:34,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-21 16:46:34,562 INFO L175 Difference]: Start difference. First operand has 249 places, 211 transitions, 1559 flow. Second operand 11 states and 131 transitions. [2024-06-21 16:46:34,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 225 transitions, 2041 flow [2024-06-21 16:46:34,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 225 transitions, 1984 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 16:46:34,799 INFO L231 Difference]: Finished difference. Result has 251 places, 212 transitions, 1591 flow [2024-06-21 16:46:34,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1591, PETRI_PLACES=251, PETRI_TRANSITIONS=212} [2024-06-21 16:46:34,799 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 221 predicate places. [2024-06-21 16:46:34,799 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 212 transitions, 1591 flow [2024-06-21 16:46:34,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:34,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:34,800 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 16:46:34,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 16:46:34,800 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 16:46:34,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:34,800 INFO L85 PathProgramCache]: Analyzing trace with hash -268423184, now seen corresponding path program 11 times [2024-06-21 16:46:34,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:34,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809425300] [2024-06-21 16:46:34,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:34,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:35,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:35,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809425300] [2024-06-21 16:46:35,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809425300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:35,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:35,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:35,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897599937] [2024-06-21 16:46:35,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:35,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:35,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:35,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:35,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:35,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:35,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 212 transitions, 1591 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:35,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:35,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:35,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:36,174 INFO L124 PetriNetUnfolderBase]: 480/938 cut-off events. [2024-06-21 16:46:36,175 INFO L125 PetriNetUnfolderBase]: For 77639/77643 co-relation queries the response was YES. [2024-06-21 16:46:36,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5564 conditions, 938 events. 480/938 cut-off events. For 77639/77643 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 5175 event pairs, 73 based on Foata normal form. 1/937 useless extension candidates. Maximal degree in co-relation 5453. Up to 683 conditions per place. [2024-06-21 16:46:36,184 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 143 selfloop transitions, 79 changer transitions 0/225 dead transitions. [2024-06-21 16:46:36,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 225 transitions, 2145 flow [2024-06-21 16:46:36,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:36,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 16:46:36,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 16:46:36,186 INFO L175 Difference]: Start difference. First operand has 251 places, 212 transitions, 1591 flow. Second operand 11 states and 138 transitions. [2024-06-21 16:46:36,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 225 transitions, 2145 flow [2024-06-21 16:46:36,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 225 transitions, 1960 flow, removed 12 selfloop flow, removed 14 redundant places. [2024-06-21 16:46:36,430 INFO L231 Difference]: Finished difference. Result has 248 places, 214 transitions, 1657 flow [2024-06-21 16:46:36,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1657, PETRI_PLACES=248, PETRI_TRANSITIONS=214} [2024-06-21 16:46:36,431 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 218 predicate places. [2024-06-21 16:46:36,431 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 214 transitions, 1657 flow [2024-06-21 16:46:36,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:36,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:36,432 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 16:46:36,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 16:46:36,432 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 16:46:36,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:36,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1038225766, now seen corresponding path program 7 times [2024-06-21 16:46:36,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:36,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4303449] [2024-06-21 16:46:36,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:36,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:37,446 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 16:46:37,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:37,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4303449] [2024-06-21 16:46:37,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4303449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:37,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:37,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:37,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23081280] [2024-06-21 16:46:37,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:37,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:37,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:37,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:37,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:37,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:37,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 214 transitions, 1657 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:37,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:37,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:37,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:37,956 INFO L124 PetriNetUnfolderBase]: 464/909 cut-off events. [2024-06-21 16:46:37,956 INFO L125 PetriNetUnfolderBase]: For 75994/75996 co-relation queries the response was YES. [2024-06-21 16:46:37,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4364 conditions, 909 events. 464/909 cut-off events. For 75994/75996 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 5023 event pairs, 59 based on Foata normal form. 12/920 useless extension candidates. Maximal degree in co-relation 4256. Up to 770 conditions per place. [2024-06-21 16:46:37,963 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 198 selfloop transitions, 21 changer transitions 9/231 dead transitions. [2024-06-21 16:46:37,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 231 transitions, 2243 flow [2024-06-21 16:46:37,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:46:37,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:46:37,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-21 16:46:37,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 16:46:37,965 INFO L175 Difference]: Start difference. First operand has 248 places, 214 transitions, 1657 flow. Second operand 12 states and 140 transitions. [2024-06-21 16:46:37,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 231 transitions, 2243 flow [2024-06-21 16:46:38,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 231 transitions, 2004 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-21 16:46:38,110 INFO L231 Difference]: Finished difference. Result has 251 places, 209 transitions, 1429 flow [2024-06-21 16:46:38,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1418, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1429, PETRI_PLACES=251, PETRI_TRANSITIONS=209} [2024-06-21 16:46:38,111 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 221 predicate places. [2024-06-21 16:46:38,111 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 209 transitions, 1429 flow [2024-06-21 16:46:38,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:38,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:38,111 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 16:46:38,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 16:46:38,111 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 16:46:38,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:38,112 INFO L85 PathProgramCache]: Analyzing trace with hash -515692550, now seen corresponding path program 1 times [2024-06-21 16:46:38,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:38,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009318556] [2024-06-21 16:46:38,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:38,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:38,867 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 16:46:38,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:38,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009318556] [2024-06-21 16:46:38,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009318556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:38,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:38,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:38,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767335742] [2024-06-21 16:46:38,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:38,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:38,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:38,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:38,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:38,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:38,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 209 transitions, 1429 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:38,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:38,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:38,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:39,248 INFO L124 PetriNetUnfolderBase]: 444/868 cut-off events. [2024-06-21 16:46:39,248 INFO L125 PetriNetUnfolderBase]: For 41905/41905 co-relation queries the response was YES. [2024-06-21 16:46:39,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3900 conditions, 868 events. 444/868 cut-off events. For 41905/41905 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 4759 event pairs, 34 based on Foata normal form. 2/869 useless extension candidates. Maximal degree in co-relation 3791. Up to 731 conditions per place. [2024-06-21 16:46:39,254 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 209 selfloop transitions, 19 changer transitions 0/231 dead transitions. [2024-06-21 16:46:39,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 231 transitions, 1949 flow [2024-06-21 16:46:39,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:39,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:39,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 16:46:39,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 16:46:39,256 INFO L175 Difference]: Start difference. First operand has 251 places, 209 transitions, 1429 flow. Second operand 11 states and 129 transitions. [2024-06-21 16:46:39,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 231 transitions, 1949 flow [2024-06-21 16:46:39,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 231 transitions, 1850 flow, removed 6 selfloop flow, removed 15 redundant places. [2024-06-21 16:46:39,374 INFO L231 Difference]: Finished difference. Result has 247 places, 210 transitions, 1384 flow [2024-06-21 16:46:39,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1384, PETRI_PLACES=247, PETRI_TRANSITIONS=210} [2024-06-21 16:46:39,374 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 217 predicate places. [2024-06-21 16:46:39,374 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 210 transitions, 1384 flow [2024-06-21 16:46:39,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:39,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:39,375 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 16:46:39,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 16:46:39,375 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 16:46:39,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:39,375 INFO L85 PathProgramCache]: Analyzing trace with hash 24112468, now seen corresponding path program 2 times [2024-06-21 16:46:39,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:39,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603443901] [2024-06-21 16:46:39,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:39,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:40,187 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 16:46:40,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:40,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603443901] [2024-06-21 16:46:40,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603443901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:40,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:40,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:40,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831067889] [2024-06-21 16:46:40,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:40,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:40,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:40,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:40,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:40,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:40,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 210 transitions, 1384 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:40,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:40,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:40,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:40,587 INFO L124 PetriNetUnfolderBase]: 455/887 cut-off events. [2024-06-21 16:46:40,587 INFO L125 PetriNetUnfolderBase]: For 48818/48818 co-relation queries the response was YES. [2024-06-21 16:46:40,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4130 conditions, 887 events. 455/887 cut-off events. For 48818/48818 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 4842 event pairs, 48 based on Foata normal form. 2/888 useless extension candidates. Maximal degree in co-relation 4021. Up to 715 conditions per place. [2024-06-21 16:46:40,595 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 204 selfloop transitions, 26 changer transitions 0/233 dead transitions. [2024-06-21 16:46:40,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 233 transitions, 2090 flow [2024-06-21 16:46:40,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:40,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:40,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 16:46:40,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40175953079178883 [2024-06-21 16:46:40,596 INFO L175 Difference]: Start difference. First operand has 247 places, 210 transitions, 1384 flow. Second operand 11 states and 137 transitions. [2024-06-21 16:46:40,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 233 transitions, 2090 flow [2024-06-21 16:46:40,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 233 transitions, 2046 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 16:46:40,745 INFO L231 Difference]: Finished difference. Result has 249 places, 212 transitions, 1422 flow [2024-06-21 16:46:40,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1422, PETRI_PLACES=249, PETRI_TRANSITIONS=212} [2024-06-21 16:46:40,745 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 219 predicate places. [2024-06-21 16:46:40,745 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 212 transitions, 1422 flow [2024-06-21 16:46:40,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:40,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:40,746 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 16:46:40,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 16:46:40,746 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 16:46:40,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:40,746 INFO L85 PathProgramCache]: Analyzing trace with hash 166215538, now seen corresponding path program 3 times [2024-06-21 16:46:40,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:40,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238313438] [2024-06-21 16:46:40,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:40,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:41,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:41,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238313438] [2024-06-21 16:46:41,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238313438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:41,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:41,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:41,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656513956] [2024-06-21 16:46:41,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:41,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:41,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:41,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:41,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:41,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:41,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 212 transitions, 1422 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:41,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:41,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:41,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:41,957 INFO L124 PetriNetUnfolderBase]: 459/895 cut-off events. [2024-06-21 16:46:41,957 INFO L125 PetriNetUnfolderBase]: For 50647/50647 co-relation queries the response was YES. [2024-06-21 16:46:41,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4197 conditions, 895 events. 459/895 cut-off events. For 50647/50647 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 4902 event pairs, 50 based on Foata normal form. 2/896 useless extension candidates. Maximal degree in co-relation 4087. Up to 751 conditions per place. [2024-06-21 16:46:41,965 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 203 selfloop transitions, 27 changer transitions 0/233 dead transitions. [2024-06-21 16:46:41,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 233 transitions, 2118 flow [2024-06-21 16:46:41,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:41,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 16:46:41,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-21 16:46:41,966 INFO L175 Difference]: Start difference. First operand has 249 places, 212 transitions, 1422 flow. Second operand 11 states and 135 transitions. [2024-06-21 16:46:41,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 233 transitions, 2118 flow [2024-06-21 16:46:42,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 233 transitions, 2072 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 16:46:42,124 INFO L231 Difference]: Finished difference. Result has 253 places, 213 transitions, 1448 flow [2024-06-21 16:46:42,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1448, PETRI_PLACES=253, PETRI_TRANSITIONS=213} [2024-06-21 16:46:42,124 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 223 predicate places. [2024-06-21 16:46:42,125 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 213 transitions, 1448 flow [2024-06-21 16:46:42,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:42,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:42,125 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 16:46:42,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 16:46:42,125 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 16:46:42,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:42,125 INFO L85 PathProgramCache]: Analyzing trace with hash -827101744, now seen corresponding path program 4 times [2024-06-21 16:46:42,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:42,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311277603] [2024-06-21 16:46:42,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:42,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:42,927 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 16:46:42,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:42,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311277603] [2024-06-21 16:46:42,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311277603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:42,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:42,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:42,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922961907] [2024-06-21 16:46:42,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:42,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:42,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:42,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:42,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:43,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:43,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 213 transitions, 1448 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:43,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:43,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:43,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:43,283 INFO L124 PetriNetUnfolderBase]: 463/903 cut-off events. [2024-06-21 16:46:43,283 INFO L125 PetriNetUnfolderBase]: For 51798/51798 co-relation queries the response was YES. [2024-06-21 16:46:43,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4270 conditions, 903 events. 463/903 cut-off events. For 51798/51798 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 4959 event pairs, 56 based on Foata normal form. 2/904 useless extension candidates. Maximal degree in co-relation 4158. Up to 796 conditions per place. [2024-06-21 16:46:43,291 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 201 selfloop transitions, 27 changer transitions 0/231 dead transitions. [2024-06-21 16:46:43,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 231 transitions, 1964 flow [2024-06-21 16:46:43,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:43,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:43,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 16:46:43,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-21 16:46:43,292 INFO L175 Difference]: Start difference. First operand has 253 places, 213 transitions, 1448 flow. Second operand 11 states and 130 transitions. [2024-06-21 16:46:43,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 231 transitions, 1964 flow [2024-06-21 16:46:43,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 231 transitions, 1899 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 16:46:43,468 INFO L231 Difference]: Finished difference. Result has 255 places, 214 transitions, 1457 flow [2024-06-21 16:46:43,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1457, PETRI_PLACES=255, PETRI_TRANSITIONS=214} [2024-06-21 16:46:43,469 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 225 predicate places. [2024-06-21 16:46:43,469 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 214 transitions, 1457 flow [2024-06-21 16:46:43,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:43,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:43,469 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 16:46:43,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 16:46:43,469 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 16:46:43,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:43,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1747989058, now seen corresponding path program 5 times [2024-06-21 16:46:43,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:43,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953424706] [2024-06-21 16:46:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:43,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:44,312 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 16:46:44,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:44,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953424706] [2024-06-21 16:46:44,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953424706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:44,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:44,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:44,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948390421] [2024-06-21 16:46:44,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:44,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:44,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:44,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:44,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:44,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:44,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 214 transitions, 1457 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:44,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:44,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:44,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:44,704 INFO L124 PetriNetUnfolderBase]: 460/898 cut-off events. [2024-06-21 16:46:44,705 INFO L125 PetriNetUnfolderBase]: For 45352/45352 co-relation queries the response was YES. [2024-06-21 16:46:44,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4069 conditions, 898 events. 460/898 cut-off events. For 45352/45352 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 4955 event pairs, 53 based on Foata normal form. 2/899 useless extension candidates. Maximal degree in co-relation 3956. Up to 777 conditions per place. [2024-06-21 16:46:44,712 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 201 selfloop transitions, 28 changer transitions 0/232 dead transitions. [2024-06-21 16:46:44,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 232 transitions, 1963 flow [2024-06-21 16:46:44,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:44,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 16:46:44,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 16:46:44,713 INFO L175 Difference]: Start difference. First operand has 255 places, 214 transitions, 1457 flow. Second operand 11 states and 132 transitions. [2024-06-21 16:46:44,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 232 transitions, 1963 flow [2024-06-21 16:46:44,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 232 transitions, 1895 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 16:46:44,848 INFO L231 Difference]: Finished difference. Result has 257 places, 214 transitions, 1449 flow [2024-06-21 16:46:44,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1449, PETRI_PLACES=257, PETRI_TRANSITIONS=214} [2024-06-21 16:46:44,849 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 227 predicate places. [2024-06-21 16:46:44,849 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 214 transitions, 1449 flow [2024-06-21 16:46:44,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:44,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:44,849 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 16:46:44,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 16:46:44,849 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 16:46:44,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:44,850 INFO L85 PathProgramCache]: Analyzing trace with hash 171937394, now seen corresponding path program 1 times [2024-06-21 16:46:44,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:44,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628201949] [2024-06-21 16:46:44,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:44,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:45,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:45,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628201949] [2024-06-21 16:46:45,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628201949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:45,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:45,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:46:45,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270153469] [2024-06-21 16:46:45,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:45,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:46:46,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:46,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:46:46,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:46:46,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:46,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 214 transitions, 1449 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:46,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:46,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:46,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:46,529 INFO L124 PetriNetUnfolderBase]: 472/926 cut-off events. [2024-06-21 16:46:46,529 INFO L125 PetriNetUnfolderBase]: For 69032/69032 co-relation queries the response was YES. [2024-06-21 16:46:46,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4284 conditions, 926 events. 472/926 cut-off events. For 69032/69032 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 5137 event pairs, 61 based on Foata normal form. 8/933 useless extension candidates. Maximal degree in co-relation 4170. Up to 780 conditions per place. [2024-06-21 16:46:46,541 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 196 selfloop transitions, 23 changer transitions 13/235 dead transitions. [2024-06-21 16:46:46,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 235 transitions, 2051 flow [2024-06-21 16:46:46,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:46:46,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:46:46,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-06-21 16:46:46,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3844086021505376 [2024-06-21 16:46:46,542 INFO L175 Difference]: Start difference. First operand has 257 places, 214 transitions, 1449 flow. Second operand 12 states and 143 transitions. [2024-06-21 16:46:46,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 235 transitions, 2051 flow [2024-06-21 16:46:46,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 235 transitions, 1988 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 16:46:46,774 INFO L231 Difference]: Finished difference. Result has 259 places, 208 transitions, 1403 flow [2024-06-21 16:46:46,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1386, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1403, PETRI_PLACES=259, PETRI_TRANSITIONS=208} [2024-06-21 16:46:46,775 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 229 predicate places. [2024-06-21 16:46:46,775 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 208 transitions, 1403 flow [2024-06-21 16:46:46,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:46,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:46,775 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 16:46:46,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 16:46:46,776 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 16:46:46,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:46,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1162661872, now seen corresponding path program 6 times [2024-06-21 16:46:46,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:46,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378320989] [2024-06-21 16:46:46,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:46,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:47,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:47,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378320989] [2024-06-21 16:46:47,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378320989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:47,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:47,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:47,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149081727] [2024-06-21 16:46:47,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:47,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:47,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:47,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:47,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:47,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:47,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 208 transitions, 1403 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:47,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:47,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:47,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:48,237 INFO L124 PetriNetUnfolderBase]: 455/891 cut-off events. [2024-06-21 16:46:48,237 INFO L125 PetriNetUnfolderBase]: For 47344/47344 co-relation queries the response was YES. [2024-06-21 16:46:48,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4043 conditions, 891 events. 455/891 cut-off events. For 47344/47344 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 4897 event pairs, 57 based on Foata normal form. 2/892 useless extension candidates. Maximal degree in co-relation 3928. Up to 779 conditions per place. [2024-06-21 16:46:48,244 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 194 selfloop transitions, 29 changer transitions 0/226 dead transitions. [2024-06-21 16:46:48,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 226 transitions, 1917 flow [2024-06-21 16:46:48,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:48,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:48,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 16:46:48,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 16:46:48,245 INFO L175 Difference]: Start difference. First operand has 259 places, 208 transitions, 1403 flow. Second operand 11 states and 133 transitions. [2024-06-21 16:46:48,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 226 transitions, 1917 flow [2024-06-21 16:46:48,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 226 transitions, 1853 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-21 16:46:48,410 INFO L231 Difference]: Finished difference. Result has 252 places, 211 transitions, 1431 flow [2024-06-21 16:46:48,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1431, PETRI_PLACES=252, PETRI_TRANSITIONS=211} [2024-06-21 16:46:48,410 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 222 predicate places. [2024-06-21 16:46:48,410 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 211 transitions, 1431 flow [2024-06-21 16:46:48,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:48,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:48,410 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 16:46:48,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 16:46:48,410 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 16:46:48,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:48,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1162869262, now seen corresponding path program 7 times [2024-06-21 16:46:48,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:48,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883043967] [2024-06-21 16:46:48,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:48,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:49,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:49,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883043967] [2024-06-21 16:46:49,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883043967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:49,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:49,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:49,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575021799] [2024-06-21 16:46:49,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:49,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:49,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:49,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:49,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:49,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:49,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 211 transitions, 1431 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:49,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:49,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:49,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:49,819 INFO L124 PetriNetUnfolderBase]: 459/899 cut-off events. [2024-06-21 16:46:49,819 INFO L125 PetriNetUnfolderBase]: For 44129/44129 co-relation queries the response was YES. [2024-06-21 16:46:49,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4041 conditions, 899 events. 459/899 cut-off events. For 44129/44129 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 4951 event pairs, 57 based on Foata normal form. 2/900 useless extension candidates. Maximal degree in co-relation 3929. Up to 773 conditions per place. [2024-06-21 16:46:49,826 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 195 selfloop transitions, 30 changer transitions 0/228 dead transitions. [2024-06-21 16:46:49,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 228 transitions, 1937 flow [2024-06-21 16:46:49,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:49,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 16:46:49,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-21 16:46:49,827 INFO L175 Difference]: Start difference. First operand has 252 places, 211 transitions, 1431 flow. Second operand 11 states and 135 transitions. [2024-06-21 16:46:49,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 228 transitions, 1937 flow [2024-06-21 16:46:49,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 228 transitions, 1870 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 16:46:49,973 INFO L231 Difference]: Finished difference. Result has 255 places, 212 transitions, 1444 flow [2024-06-21 16:46:49,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1444, PETRI_PLACES=255, PETRI_TRANSITIONS=212} [2024-06-21 16:46:49,974 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 225 predicate places. [2024-06-21 16:46:49,974 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 212 transitions, 1444 flow [2024-06-21 16:46:49,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:49,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:49,974 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 16:46:49,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 16:46:49,974 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 16:46:49,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:49,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1306903942, now seen corresponding path program 8 times [2024-06-21 16:46:49,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:49,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869178019] [2024-06-21 16:46:49,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:49,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:50,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:50,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869178019] [2024-06-21 16:46:50,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869178019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:50,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:50,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:50,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143487636] [2024-06-21 16:46:50,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:50,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:50,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:50,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:50,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:50,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:50,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 212 transitions, 1444 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:50,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:50,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:50,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:51,330 INFO L124 PetriNetUnfolderBase]: 463/907 cut-off events. [2024-06-21 16:46:51,330 INFO L125 PetriNetUnfolderBase]: For 45224/45224 co-relation queries the response was YES. [2024-06-21 16:46:51,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4079 conditions, 907 events. 463/907 cut-off events. For 45224/45224 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 5007 event pairs, 57 based on Foata normal form. 2/908 useless extension candidates. Maximal degree in co-relation 3967. Up to 759 conditions per place. [2024-06-21 16:46:51,336 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 196 selfloop transitions, 31 changer transitions 0/230 dead transitions. [2024-06-21 16:46:51,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 230 transitions, 1958 flow [2024-06-21 16:46:51,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:51,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:51,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 16:46:51,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40175953079178883 [2024-06-21 16:46:51,337 INFO L175 Difference]: Start difference. First operand has 255 places, 212 transitions, 1444 flow. Second operand 11 states and 137 transitions. [2024-06-21 16:46:51,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 230 transitions, 1958 flow [2024-06-21 16:46:51,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 230 transitions, 1888 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 16:46:51,499 INFO L231 Difference]: Finished difference. Result has 257 places, 213 transitions, 1458 flow [2024-06-21 16:46:51,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1458, PETRI_PLACES=257, PETRI_TRANSITIONS=213} [2024-06-21 16:46:51,499 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 227 predicate places. [2024-06-21 16:46:51,499 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 213 transitions, 1458 flow [2024-06-21 16:46:51,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:51,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:51,500 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 16:46:51,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 16:46:51,500 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 16:46:51,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:51,500 INFO L85 PathProgramCache]: Analyzing trace with hash 265788128, now seen corresponding path program 9 times [2024-06-21 16:46:51,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:51,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699180031] [2024-06-21 16:46:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:51,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:52,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:52,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699180031] [2024-06-21 16:46:52,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699180031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:52,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:52,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:52,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515704834] [2024-06-21 16:46:52,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:52,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:52,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:52,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:52,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:52,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:52,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 213 transitions, 1458 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:52,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:52,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:52,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:52,882 INFO L124 PetriNetUnfolderBase]: 565/1105 cut-off events. [2024-06-21 16:46:52,882 INFO L125 PetriNetUnfolderBase]: For 54430/54430 co-relation queries the response was YES. [2024-06-21 16:46:52,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4992 conditions, 1105 events. 565/1105 cut-off events. For 54430/54430 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 6437 event pairs, 71 based on Foata normal form. 2/1106 useless extension candidates. Maximal degree in co-relation 4879. Up to 872 conditions per place. [2024-06-21 16:46:52,890 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 235 selfloop transitions, 36 changer transitions 0/274 dead transitions. [2024-06-21 16:46:52,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 274 transitions, 2544 flow [2024-06-21 16:46:52,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:46:52,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:46:52,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-06-21 16:46:52,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897849462365591 [2024-06-21 16:46:52,892 INFO L175 Difference]: Start difference. First operand has 257 places, 213 transitions, 1458 flow. Second operand 12 states and 145 transitions. [2024-06-21 16:46:52,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 274 transitions, 2544 flow [2024-06-21 16:46:53,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 274 transitions, 2408 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 16:46:53,069 INFO L231 Difference]: Finished difference. Result has 267 places, 242 transitions, 1764 flow [2024-06-21 16:46:53,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1764, PETRI_PLACES=267, PETRI_TRANSITIONS=242} [2024-06-21 16:46:53,069 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 237 predicate places. [2024-06-21 16:46:53,069 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 242 transitions, 1764 flow [2024-06-21 16:46:53,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:53,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:53,070 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 16:46:53,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 16:46:53,070 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 16:46:53,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:53,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1271677612, now seen corresponding path program 10 times [2024-06-21 16:46:53,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:53,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674787209] [2024-06-21 16:46:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:53,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:53,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:53,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674787209] [2024-06-21 16:46:53,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674787209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:53,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:53,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:53,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479911990] [2024-06-21 16:46:53,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:53,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:53,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:53,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:53,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:54,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:54,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 242 transitions, 1764 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:54,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:54,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:54,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:54,511 INFO L124 PetriNetUnfolderBase]: 593/1157 cut-off events. [2024-06-21 16:46:54,511 INFO L125 PetriNetUnfolderBase]: For 80034/80034 co-relation queries the response was YES. [2024-06-21 16:46:54,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5753 conditions, 1157 events. 593/1157 cut-off events. For 80034/80034 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 6793 event pairs, 76 based on Foata normal form. 4/1160 useless extension candidates. Maximal degree in co-relation 5632. Up to 956 conditions per place. [2024-06-21 16:46:54,521 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 208 selfloop transitions, 54 changer transitions 0/265 dead transitions. [2024-06-21 16:46:54,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 265 transitions, 2621 flow [2024-06-21 16:46:54,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 16:46:54,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 16:46:54,522 INFO L175 Difference]: Start difference. First operand has 267 places, 242 transitions, 1764 flow. Second operand 11 states and 136 transitions. [2024-06-21 16:46:54,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 265 transitions, 2621 flow [2024-06-21 16:46:54,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 265 transitions, 2587 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-21 16:46:54,728 INFO L231 Difference]: Finished difference. Result has 277 places, 250 transitions, 1968 flow [2024-06-21 16:46:54,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1968, PETRI_PLACES=277, PETRI_TRANSITIONS=250} [2024-06-21 16:46:54,729 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 247 predicate places. [2024-06-21 16:46:54,729 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 250 transitions, 1968 flow [2024-06-21 16:46:54,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:54,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:54,729 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 16:46:54,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 16:46:54,729 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 16:46:54,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:54,730 INFO L85 PathProgramCache]: Analyzing trace with hash -103292738, now seen corresponding path program 11 times [2024-06-21 16:46:54,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:54,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152617825] [2024-06-21 16:46:54,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:54,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:55,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:55,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152617825] [2024-06-21 16:46:55,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152617825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:55,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:55,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:55,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656953071] [2024-06-21 16:46:55,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:55,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:55,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:55,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:55,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:55,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:55,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 250 transitions, 1968 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:55,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:55,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:55,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:56,022 INFO L124 PetriNetUnfolderBase]: 601/1173 cut-off events. [2024-06-21 16:46:56,022 INFO L125 PetriNetUnfolderBase]: For 82251/82251 co-relation queries the response was YES. [2024-06-21 16:46:56,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5962 conditions, 1173 events. 601/1173 cut-off events. For 82251/82251 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 6911 event pairs, 82 based on Foata normal form. 4/1176 useless extension candidates. Maximal degree in co-relation 5838. Up to 1006 conditions per place. [2024-06-21 16:46:56,029 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 209 selfloop transitions, 53 changer transitions 0/265 dead transitions. [2024-06-21 16:46:56,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 265 transitions, 2563 flow [2024-06-21 16:46:56,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-21 16:46:56,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-21 16:46:56,030 INFO L175 Difference]: Start difference. First operand has 277 places, 250 transitions, 1968 flow. Second operand 11 states and 131 transitions. [2024-06-21 16:46:56,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 265 transitions, 2563 flow [2024-06-21 16:46:56,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 265 transitions, 2459 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 16:46:56,254 INFO L231 Difference]: Finished difference. Result has 281 places, 252 transitions, 2021 flow [2024-06-21 16:46:56,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1864, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2021, PETRI_PLACES=281, PETRI_TRANSITIONS=252} [2024-06-21 16:46:56,254 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 251 predicate places. [2024-06-21 16:46:56,254 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 252 transitions, 2021 flow [2024-06-21 16:46:56,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:56,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:56,254 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 16:46:56,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 16:46:56,255 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 16:46:56,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:56,255 INFO L85 PathProgramCache]: Analyzing trace with hash -304381988, now seen corresponding path program 12 times [2024-06-21 16:46:56,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:56,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546546855] [2024-06-21 16:46:56,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:56,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:57,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:57,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546546855] [2024-06-21 16:46:57,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546546855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:57,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:57,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:57,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823437985] [2024-06-21 16:46:57,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:57,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:57,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:57,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:57,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:57,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:57,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 252 transitions, 2021 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:57,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:57,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:57,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:57,729 INFO L124 PetriNetUnfolderBase]: 595/1167 cut-off events. [2024-06-21 16:46:57,729 INFO L125 PetriNetUnfolderBase]: For 67189/67189 co-relation queries the response was YES. [2024-06-21 16:46:57,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5601 conditions, 1167 events. 595/1167 cut-off events. For 67189/67189 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 6894 event pairs, 80 based on Foata normal form. 4/1170 useless extension candidates. Maximal degree in co-relation 5476. Up to 996 conditions per place. [2024-06-21 16:46:57,740 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 210 selfloop transitions, 52 changer transitions 0/265 dead transitions. [2024-06-21 16:46:57,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 265 transitions, 2575 flow [2024-06-21 16:46:57,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 16:46:57,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 16:46:57,741 INFO L175 Difference]: Start difference. First operand has 281 places, 252 transitions, 2021 flow. Second operand 11 states and 133 transitions. [2024-06-21 16:46:57,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 265 transitions, 2575 flow [2024-06-21 16:46:57,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 265 transitions, 2417 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-21 16:46:57,916 INFO L231 Difference]: Finished difference. Result has 283 places, 252 transitions, 1973 flow [2024-06-21 16:46:57,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1863, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1973, PETRI_PLACES=283, PETRI_TRANSITIONS=252} [2024-06-21 16:46:57,917 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 253 predicate places. [2024-06-21 16:46:57,917 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 252 transitions, 1973 flow [2024-06-21 16:46:57,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:57,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:57,917 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 16:46:57,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 16:46:57,917 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 16:46:57,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:57,918 INFO L85 PathProgramCache]: Analyzing trace with hash -110442578, now seen corresponding path program 13 times [2024-06-21 16:46:57,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:57,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350162917] [2024-06-21 16:46:57,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:57,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:58,840 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 16:46:58,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:58,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350162917] [2024-06-21 16:46:58,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350162917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:58,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:58,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:46:58,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897797170] [2024-06-21 16:46:58,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:58,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:46:58,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:58,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:46:58,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:46:58,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:46:58,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 252 transitions, 1973 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:58,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:58,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:46:58,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:59,413 INFO L124 PetriNetUnfolderBase]: 603/1178 cut-off events. [2024-06-21 16:46:59,413 INFO L125 PetriNetUnfolderBase]: For 68540/68540 co-relation queries the response was YES. [2024-06-21 16:46:59,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5613 conditions, 1178 events. 603/1178 cut-off events. For 68540/68540 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 6969 event pairs, 82 based on Foata normal form. 4/1181 useless extension candidates. Maximal degree in co-relation 5487. Up to 977 conditions per place. [2024-06-21 16:46:59,421 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 200 selfloop transitions, 64 changer transitions 0/267 dead transitions. [2024-06-21 16:46:59,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 267 transitions, 2576 flow [2024-06-21 16:46:59,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:46:59,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:46:59,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 16:46:59,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 16:46:59,422 INFO L175 Difference]: Start difference. First operand has 283 places, 252 transitions, 1973 flow. Second operand 11 states and 133 transitions. [2024-06-21 16:46:59,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 267 transitions, 2576 flow [2024-06-21 16:46:59,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 267 transitions, 2467 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 16:46:59,601 INFO L231 Difference]: Finished difference. Result has 284 places, 254 transitions, 2047 flow [2024-06-21 16:46:59,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1864, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2047, PETRI_PLACES=284, PETRI_TRANSITIONS=254} [2024-06-21 16:46:59,602 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 254 predicate places. [2024-06-21 16:46:59,602 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 254 transitions, 2047 flow [2024-06-21 16:46:59,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:59,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:59,602 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 16:46:59,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 16:46:59,602 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 16:46:59,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:59,603 INFO L85 PathProgramCache]: Analyzing trace with hash 7030194, now seen corresponding path program 14 times [2024-06-21 16:46:59,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:59,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278918710] [2024-06-21 16:46:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:59,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:00,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:00,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278918710] [2024-06-21 16:47:00,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278918710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:00,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:00,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:00,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632844177] [2024-06-21 16:47:00,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:00,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:00,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:00,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:00,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:00,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:00,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 254 transitions, 2047 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:00,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:00,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:00,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:00,988 INFO L124 PetriNetUnfolderBase]: 618/1207 cut-off events. [2024-06-21 16:47:00,988 INFO L125 PetriNetUnfolderBase]: For 79224/79224 co-relation queries the response was YES. [2024-06-21 16:47:00,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6081 conditions, 1207 events. 618/1207 cut-off events. For 79224/79224 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7185 event pairs, 81 based on Foata normal form. 4/1210 useless extension candidates. Maximal degree in co-relation 5954. Up to 876 conditions per place. [2024-06-21 16:47:00,999 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 198 selfloop transitions, 72 changer transitions 0/273 dead transitions. [2024-06-21 16:47:00,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 273 transitions, 2884 flow [2024-06-21 16:47:00,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:01,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 16:47:01,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40175953079178883 [2024-06-21 16:47:01,000 INFO L175 Difference]: Start difference. First operand has 284 places, 254 transitions, 2047 flow. Second operand 11 states and 137 transitions. [2024-06-21 16:47:01,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 273 transitions, 2884 flow [2024-06-21 16:47:01,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 273 transitions, 2690 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-21 16:47:01,208 INFO L231 Difference]: Finished difference. Result has 285 places, 257 transitions, 2079 flow [2024-06-21 16:47:01,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2079, PETRI_PLACES=285, PETRI_TRANSITIONS=257} [2024-06-21 16:47:01,208 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 255 predicate places. [2024-06-21 16:47:01,208 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 257 transitions, 2079 flow [2024-06-21 16:47:01,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:01,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:01,209 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 16:47:01,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 16:47:01,209 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 16:47:01,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:01,210 INFO L85 PathProgramCache]: Analyzing trace with hash -110649968, now seen corresponding path program 15 times [2024-06-21 16:47:01,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:01,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688346551] [2024-06-21 16:47:01,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:01,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:02,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:02,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688346551] [2024-06-21 16:47:02,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688346551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:02,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:02,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:02,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473539265] [2024-06-21 16:47:02,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:02,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:02,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:02,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:02,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:02,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:02,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 257 transitions, 2079 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:02,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:02,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:02,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:02,632 INFO L124 PetriNetUnfolderBase]: 612/1197 cut-off events. [2024-06-21 16:47:02,632 INFO L125 PetriNetUnfolderBase]: For 63166/63166 co-relation queries the response was YES. [2024-06-21 16:47:02,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5616 conditions, 1197 events. 612/1197 cut-off events. For 63166/63166 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7126 event pairs, 83 based on Foata normal form. 4/1200 useless extension candidates. Maximal degree in co-relation 5488. Up to 956 conditions per place. [2024-06-21 16:47:02,641 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 200 selfloop transitions, 68 changer transitions 0/271 dead transitions. [2024-06-21 16:47:02,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 271 transitions, 2647 flow [2024-06-21 16:47:02,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:02,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 16:47:02,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 16:47:02,644 INFO L175 Difference]: Start difference. First operand has 285 places, 257 transitions, 2079 flow. Second operand 11 states and 134 transitions. [2024-06-21 16:47:02,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 271 transitions, 2647 flow [2024-06-21 16:47:02,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 271 transitions, 2499 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-21 16:47:02,823 INFO L231 Difference]: Finished difference. Result has 289 places, 257 transitions, 2072 flow [2024-06-21 16:47:02,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1931, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2072, PETRI_PLACES=289, PETRI_TRANSITIONS=257} [2024-06-21 16:47:02,824 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 259 predicate places. [2024-06-21 16:47:02,824 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 257 transitions, 2072 flow [2024-06-21 16:47:02,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:02,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:02,825 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 16:47:02,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 16:47:02,825 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 16:47:02,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:02,825 INFO L85 PathProgramCache]: Analyzing trace with hash -304374052, now seen corresponding path program 2 times [2024-06-21 16:47:02,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:02,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442260244] [2024-06-21 16:47:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:02,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:03,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:03,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442260244] [2024-06-21 16:47:03,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442260244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:03,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:03,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:47:03,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325878892] [2024-06-21 16:47:03,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:03,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:47:03,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:03,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:47:03,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:47:04,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:04,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 257 transitions, 2072 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:04,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:04,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:04,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:04,630 INFO L124 PetriNetUnfolderBase]: 627/1231 cut-off events. [2024-06-21 16:47:04,630 INFO L125 PetriNetUnfolderBase]: For 82183/82183 co-relation queries the response was YES. [2024-06-21 16:47:04,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5842 conditions, 1231 events. 627/1231 cut-off events. For 82183/82183 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 7401 event pairs, 89 based on Foata normal form. 8/1238 useless extension candidates. Maximal degree in co-relation 5712. Up to 1039 conditions per place. [2024-06-21 16:47:04,642 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 215 selfloop transitions, 48 changer transitions 10/276 dead transitions. [2024-06-21 16:47:04,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 276 transitions, 2744 flow [2024-06-21 16:47:04,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:47:04,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:47:04,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-06-21 16:47:04,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897849462365591 [2024-06-21 16:47:04,643 INFO L175 Difference]: Start difference. First operand has 289 places, 257 transitions, 2072 flow. Second operand 12 states and 145 transitions. [2024-06-21 16:47:04,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 276 transitions, 2744 flow [2024-06-21 16:47:04,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 276 transitions, 2541 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 16:47:04,840 INFO L231 Difference]: Finished difference. Result has 291 places, 255 transitions, 1950 flow [2024-06-21 16:47:04,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1869, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1950, PETRI_PLACES=291, PETRI_TRANSITIONS=255} [2024-06-21 16:47:04,840 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 261 predicate places. [2024-06-21 16:47:04,840 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 255 transitions, 1950 flow [2024-06-21 16:47:04,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:04,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:04,841 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 16:47:04,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 16:47:04,841 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 16:47:04,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:04,842 INFO L85 PathProgramCache]: Analyzing trace with hash -110434642, now seen corresponding path program 3 times [2024-06-21 16:47:04,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:04,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668839878] [2024-06-21 16:47:04,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:04,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:06,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:06,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668839878] [2024-06-21 16:47:06,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668839878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:06,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:06,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:47:06,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874188477] [2024-06-21 16:47:06,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:06,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:47:06,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:06,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:47:06,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:47:06,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:06,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 255 transitions, 1950 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:06,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:06,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:06,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:06,775 INFO L124 PetriNetUnfolderBase]: 623/1231 cut-off events. [2024-06-21 16:47:06,776 INFO L125 PetriNetUnfolderBase]: For 83580/83580 co-relation queries the response was YES. [2024-06-21 16:47:06,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5654 conditions, 1231 events. 623/1231 cut-off events. For 83580/83580 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 7405 event pairs, 91 based on Foata normal form. 8/1238 useless extension candidates. Maximal degree in co-relation 5523. Up to 1035 conditions per place. [2024-06-21 16:47:06,786 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 215 selfloop transitions, 46 changer transitions 10/274 dead transitions. [2024-06-21 16:47:06,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 274 transitions, 2622 flow [2024-06-21 16:47:06,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:47:06,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:47:06,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 144 transitions. [2024-06-21 16:47:06,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 16:47:06,787 INFO L175 Difference]: Start difference. First operand has 291 places, 255 transitions, 1950 flow. Second operand 12 states and 144 transitions. [2024-06-21 16:47:06,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 274 transitions, 2622 flow [2024-06-21 16:47:06,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 274 transitions, 2516 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 16:47:06,992 INFO L231 Difference]: Finished difference. Result has 291 places, 253 transitions, 1925 flow [2024-06-21 16:47:06,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1925, PETRI_PLACES=291, PETRI_TRANSITIONS=253} [2024-06-21 16:47:06,993 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 261 predicate places. [2024-06-21 16:47:06,993 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 253 transitions, 1925 flow [2024-06-21 16:47:06,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:06,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:06,993 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 16:47:06,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 16:47:06,993 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 16:47:06,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:06,994 INFO L85 PathProgramCache]: Analyzing trace with hash -103016032, now seen corresponding path program 4 times [2024-06-21 16:47:06,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:06,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639585457] [2024-06-21 16:47:06,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:06,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:07,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:07,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639585457] [2024-06-21 16:47:07,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639585457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:07,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:07,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:47:07,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538627194] [2024-06-21 16:47:07,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:07,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:47:07,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:07,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:47:07,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:47:08,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:08,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 253 transitions, 1925 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:08,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:08,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:08,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:08,583 INFO L124 PetriNetUnfolderBase]: 634/1259 cut-off events. [2024-06-21 16:47:08,583 INFO L125 PetriNetUnfolderBase]: For 106707/106707 co-relation queries the response was YES. [2024-06-21 16:47:08,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6617 conditions, 1259 events. 634/1259 cut-off events. For 106707/106707 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 7606 event pairs, 99 based on Foata normal form. 6/1264 useless extension candidates. Maximal degree in co-relation 6486. Up to 965 conditions per place. [2024-06-21 16:47:08,594 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 204 selfloop transitions, 61 changer transitions 6/274 dead transitions. [2024-06-21 16:47:08,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 274 transitions, 2829 flow [2024-06-21 16:47:08,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:47:08,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:47:08,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-21 16:47:08,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 16:47:08,595 INFO L175 Difference]: Start difference. First operand has 291 places, 253 transitions, 1925 flow. Second operand 12 states and 148 transitions. [2024-06-21 16:47:08,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 274 transitions, 2829 flow [2024-06-21 16:47:09,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 274 transitions, 2729 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 16:47:09,005 INFO L231 Difference]: Finished difference. Result has 290 places, 251 transitions, 1940 flow [2024-06-21 16:47:09,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1827, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1940, PETRI_PLACES=290, PETRI_TRANSITIONS=251} [2024-06-21 16:47:09,005 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2024-06-21 16:47:09,005 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 251 transitions, 1940 flow [2024-06-21 16:47:09,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:09,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:09,006 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 16:47:09,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 16:47:09,006 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 16:47:09,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:09,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1162653936, now seen corresponding path program 5 times [2024-06-21 16:47:09,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:09,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965849287] [2024-06-21 16:47:09,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:09,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:10,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:10,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965849287] [2024-06-21 16:47:10,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965849287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:10,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:10,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:47:10,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354096283] [2024-06-21 16:47:10,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:10,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:47:10,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:10,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:47:10,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:47:10,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:10,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 251 transitions, 1940 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:10,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:10,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:10,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:10,915 INFO L124 PetriNetUnfolderBase]: 643/1279 cut-off events. [2024-06-21 16:47:10,915 INFO L125 PetriNetUnfolderBase]: For 143721/143721 co-relation queries the response was YES. [2024-06-21 16:47:10,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6822 conditions, 1279 events. 643/1279 cut-off events. For 143721/143721 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 7766 event pairs, 107 based on Foata normal form. 14/1292 useless extension candidates. Maximal degree in co-relation 6692. Up to 1047 conditions per place. [2024-06-21 16:47:10,926 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 209 selfloop transitions, 42 changer transitions 16/270 dead transitions. [2024-06-21 16:47:10,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 270 transitions, 2604 flow [2024-06-21 16:47:10,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:47:10,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:47:10,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 16:47:10,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924731182795699 [2024-06-21 16:47:10,927 INFO L175 Difference]: Start difference. First operand has 290 places, 251 transitions, 1940 flow. Second operand 12 states and 146 transitions. [2024-06-21 16:47:10,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 270 transitions, 2604 flow [2024-06-21 16:47:11,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 270 transitions, 2480 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 16:47:11,326 INFO L231 Difference]: Finished difference. Result has 290 places, 244 transitions, 1847 flow [2024-06-21 16:47:11,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1847, PETRI_PLACES=290, PETRI_TRANSITIONS=244} [2024-06-21 16:47:11,327 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2024-06-21 16:47:11,327 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 244 transitions, 1847 flow [2024-06-21 16:47:11,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:11,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:11,327 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 16:47:11,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 16:47:11,328 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 16:47:11,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:11,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1472982188, now seen corresponding path program 6 times [2024-06-21 16:47:11,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:11,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434910464] [2024-06-21 16:47:11,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:11,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:12,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:12,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434910464] [2024-06-21 16:47:12,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434910464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:12,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:12,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:47:12,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467174772] [2024-06-21 16:47:12,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:12,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:47:12,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:12,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:47:12,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:47:12,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:12,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 244 transitions, 1847 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:12,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:12,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:12,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:13,029 INFO L124 PetriNetUnfolderBase]: 614/1224 cut-off events. [2024-06-21 16:47:13,029 INFO L125 PetriNetUnfolderBase]: For 115728/115728 co-relation queries the response was YES. [2024-06-21 16:47:13,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6505 conditions, 1224 events. 614/1224 cut-off events. For 115728/115728 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 7383 event pairs, 101 based on Foata normal form. 8/1231 useless extension candidates. Maximal degree in co-relation 6375. Up to 1038 conditions per place. [2024-06-21 16:47:13,046 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 208 selfloop transitions, 40 changer transitions 10/261 dead transitions. [2024-06-21 16:47:13,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 261 transitions, 2479 flow [2024-06-21 16:47:13,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:47:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:47:13,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-06-21 16:47:13,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3844086021505376 [2024-06-21 16:47:13,047 INFO L175 Difference]: Start difference. First operand has 290 places, 244 transitions, 1847 flow. Second operand 12 states and 143 transitions. [2024-06-21 16:47:13,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 261 transitions, 2479 flow [2024-06-21 16:47:13,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 261 transitions, 2385 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 16:47:13,449 INFO L231 Difference]: Finished difference. Result has 286 places, 240 transitions, 1802 flow [2024-06-21 16:47:13,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1753, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1802, PETRI_PLACES=286, PETRI_TRANSITIONS=240} [2024-06-21 16:47:13,449 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 256 predicate places. [2024-06-21 16:47:13,449 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 240 transitions, 1802 flow [2024-06-21 16:47:13,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:13,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:13,449 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 16:47:13,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 16:47:13,450 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 16:47:13,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:13,450 INFO L85 PathProgramCache]: Analyzing trace with hash -103025332, now seen corresponding path program 7 times [2024-06-21 16:47:13,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:13,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249260779] [2024-06-21 16:47:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:13,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:14,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:14,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249260779] [2024-06-21 16:47:14,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249260779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:14,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:14,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:47:14,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733798994] [2024-06-21 16:47:14,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:14,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:47:14,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:14,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:47:14,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:47:14,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:14,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 240 transitions, 1802 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:14,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:14,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:14,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:14,949 INFO L124 PetriNetUnfolderBase]: 585/1168 cut-off events. [2024-06-21 16:47:14,949 INFO L125 PetriNetUnfolderBase]: For 79666/79666 co-relation queries the response was YES. [2024-06-21 16:47:14,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5354 conditions, 1168 events. 585/1168 cut-off events. For 79666/79666 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 7024 event pairs, 91 based on Foata normal form. 8/1175 useless extension candidates. Maximal degree in co-relation 5226. Up to 945 conditions per place. [2024-06-21 16:47:14,959 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 194 selfloop transitions, 48 changer transitions 12/257 dead transitions. [2024-06-21 16:47:14,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 257 transitions, 2426 flow [2024-06-21 16:47:14,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:47:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:47:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-06-21 16:47:14,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3844086021505376 [2024-06-21 16:47:14,960 INFO L175 Difference]: Start difference. First operand has 286 places, 240 transitions, 1802 flow. Second operand 12 states and 143 transitions. [2024-06-21 16:47:14,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 257 transitions, 2426 flow [2024-06-21 16:47:15,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 257 transitions, 2338 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-21 16:47:15,147 INFO L231 Difference]: Finished difference. Result has 284 places, 235 transitions, 1776 flow [2024-06-21 16:47:15,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1776, PETRI_PLACES=284, PETRI_TRANSITIONS=235} [2024-06-21 16:47:15,148 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 254 predicate places. [2024-06-21 16:47:15,148 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 235 transitions, 1776 flow [2024-06-21 16:47:15,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:15,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:15,148 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 16:47:15,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 16:47:15,148 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 16:47:15,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:15,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1028008898, now seen corresponding path program 16 times [2024-06-21 16:47:15,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:15,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561681471] [2024-06-21 16:47:15,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:15,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:16,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:16,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561681471] [2024-06-21 16:47:16,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561681471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:16,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:16,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:16,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940908251] [2024-06-21 16:47:16,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:16,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:16,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:16,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:16,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:16,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:16,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 235 transitions, 1776 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:16,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:16,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:16,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:16,637 INFO L124 PetriNetUnfolderBase]: 569/1135 cut-off events. [2024-06-21 16:47:16,638 INFO L125 PetriNetUnfolderBase]: For 53347/53347 co-relation queries the response was YES. [2024-06-21 16:47:16,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5155 conditions, 1135 events. 569/1135 cut-off events. For 53347/53347 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 6795 event pairs, 95 based on Foata normal form. 2/1136 useless extension candidates. Maximal degree in co-relation 5028. Up to 851 conditions per place. [2024-06-21 16:47:16,649 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 171 selfloop transitions, 73 changer transitions 0/247 dead transitions. [2024-06-21 16:47:16,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 247 transitions, 2312 flow [2024-06-21 16:47:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:16,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:16,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-21 16:47:16,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41055718475073316 [2024-06-21 16:47:16,652 INFO L175 Difference]: Start difference. First operand has 284 places, 235 transitions, 1776 flow. Second operand 11 states and 140 transitions. [2024-06-21 16:47:16,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 247 transitions, 2312 flow [2024-06-21 16:47:16,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 247 transitions, 2202 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 16:47:16,850 INFO L231 Difference]: Finished difference. Result has 278 places, 236 transitions, 1842 flow [2024-06-21 16:47:16,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1666, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1842, PETRI_PLACES=278, PETRI_TRANSITIONS=236} [2024-06-21 16:47:16,850 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 248 predicate places. [2024-06-21 16:47:16,851 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 236 transitions, 1842 flow [2024-06-21 16:47:16,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:16,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:16,851 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 16:47:16,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 16:47:16,851 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 16:47:16,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:16,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1741637992, now seen corresponding path program 17 times [2024-06-21 16:47:16,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:16,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55403642] [2024-06-21 16:47:16,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:16,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:17,836 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 16:47:17,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:17,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55403642] [2024-06-21 16:47:17,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55403642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:17,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:17,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:17,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686119703] [2024-06-21 16:47:17,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:17,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:17,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:17,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:17,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:17,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:17,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 236 transitions, 1842 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:17,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:17,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:17,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:18,408 INFO L124 PetriNetUnfolderBase]: 573/1144 cut-off events. [2024-06-21 16:47:18,408 INFO L125 PetriNetUnfolderBase]: For 51743/51743 co-relation queries the response was YES. [2024-06-21 16:47:18,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5219 conditions, 1144 events. 573/1144 cut-off events. For 51743/51743 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 6843 event pairs, 88 based on Foata normal form. 2/1145 useless extension candidates. Maximal degree in co-relation 5094. Up to 880 conditions per place. [2024-06-21 16:47:18,418 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 178 selfloop transitions, 68 changer transitions 0/249 dead transitions. [2024-06-21 16:47:18,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 249 transitions, 2386 flow [2024-06-21 16:47:18,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:47:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:47:18,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2024-06-21 16:47:18,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 16:47:18,419 INFO L175 Difference]: Start difference. First operand has 278 places, 236 transitions, 1842 flow. Second operand 12 states and 150 transitions. [2024-06-21 16:47:18,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 249 transitions, 2386 flow [2024-06-21 16:47:18,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 249 transitions, 2220 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 16:47:18,599 INFO L231 Difference]: Finished difference. Result has 281 places, 237 transitions, 1844 flow [2024-06-21 16:47:18,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1676, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1844, PETRI_PLACES=281, PETRI_TRANSITIONS=237} [2024-06-21 16:47:18,599 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 251 predicate places. [2024-06-21 16:47:18,599 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 237 transitions, 1844 flow [2024-06-21 16:47:18,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:18,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:18,600 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 16:47:18,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 16:47:18,600 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 16:47:18,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:18,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1965667220, now seen corresponding path program 18 times [2024-06-21 16:47:18,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:18,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485221879] [2024-06-21 16:47:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:18,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:19,493 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 16:47:19,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:19,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485221879] [2024-06-21 16:47:19,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485221879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:19,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:19,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:19,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308539078] [2024-06-21 16:47:19,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:19,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:19,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:19,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:19,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:19,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:19,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 237 transitions, 1844 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:19,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:19,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:19,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:19,991 INFO L124 PetriNetUnfolderBase]: 580/1159 cut-off events. [2024-06-21 16:47:19,992 INFO L125 PetriNetUnfolderBase]: For 52911/52911 co-relation queries the response was YES. [2024-06-21 16:47:19,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5281 conditions, 1159 events. 580/1159 cut-off events. For 52911/52911 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 6989 event pairs, 97 based on Foata normal form. 2/1160 useless extension candidates. Maximal degree in co-relation 5155. Up to 871 conditions per place. [2024-06-21 16:47:20,001 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 161 selfloop transitions, 87 changer transitions 0/251 dead transitions. [2024-06-21 16:47:20,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 251 transitions, 2410 flow [2024-06-21 16:47:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 16:47:20,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-21 16:47:20,002 INFO L175 Difference]: Start difference. First operand has 281 places, 237 transitions, 1844 flow. Second operand 11 states and 135 transitions. [2024-06-21 16:47:20,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 251 transitions, 2410 flow [2024-06-21 16:47:20,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 251 transitions, 2248 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-21 16:47:20,165 INFO L231 Difference]: Finished difference. Result has 282 places, 240 transitions, 1908 flow [2024-06-21 16:47:20,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1908, PETRI_PLACES=282, PETRI_TRANSITIONS=240} [2024-06-21 16:47:20,166 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 252 predicate places. [2024-06-21 16:47:20,166 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 240 transitions, 1908 flow [2024-06-21 16:47:20,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:20,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:20,166 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 16:47:20,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 16:47:20,167 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 16:47:20,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:20,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1908818332, now seen corresponding path program 19 times [2024-06-21 16:47:20,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:20,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215733458] [2024-06-21 16:47:20,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:20,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:21,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:21,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215733458] [2024-06-21 16:47:21,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215733458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:21,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:21,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:21,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611775391] [2024-06-21 16:47:21,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:21,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:21,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:21,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:21,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:21,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:21,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 240 transitions, 1908 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:21,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:21,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:21,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:21,560 INFO L124 PetriNetUnfolderBase]: 591/1180 cut-off events. [2024-06-21 16:47:21,560 INFO L125 PetriNetUnfolderBase]: For 63327/63327 co-relation queries the response was YES. [2024-06-21 16:47:21,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5673 conditions, 1180 events. 591/1180 cut-off events. For 63327/63327 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 7118 event pairs, 98 based on Foata normal form. 2/1181 useless extension candidates. Maximal degree in co-relation 5546. Up to 869 conditions per place. [2024-06-21 16:47:21,570 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 163 selfloop transitions, 89 changer transitions 0/255 dead transitions. [2024-06-21 16:47:21,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 255 transitions, 2688 flow [2024-06-21 16:47:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:21,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 16:47:21,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40175953079178883 [2024-06-21 16:47:21,571 INFO L175 Difference]: Start difference. First operand has 282 places, 240 transitions, 1908 flow. Second operand 11 states and 137 transitions. [2024-06-21 16:47:21,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 255 transitions, 2688 flow [2024-06-21 16:47:21,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 255 transitions, 2499 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 16:47:21,796 INFO L231 Difference]: Finished difference. Result has 286 places, 242 transitions, 1963 flow [2024-06-21 16:47:21,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1963, PETRI_PLACES=286, PETRI_TRANSITIONS=242} [2024-06-21 16:47:21,796 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 256 predicate places. [2024-06-21 16:47:21,797 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 242 transitions, 1963 flow [2024-06-21 16:47:21,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:21,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:21,797 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 16:47:21,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 16:47:21,797 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 16:47:21,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:21,797 INFO L85 PathProgramCache]: Analyzing trace with hash 877851578, now seen corresponding path program 20 times [2024-06-21 16:47:21,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:21,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964028652] [2024-06-21 16:47:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:21,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:22,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:22,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964028652] [2024-06-21 16:47:22,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964028652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:22,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:22,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:22,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426922639] [2024-06-21 16:47:22,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:22,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:22,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:22,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:22,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:22,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:22,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 242 transitions, 1963 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:22,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:22,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:22,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:23,193 INFO L124 PetriNetUnfolderBase]: 602/1201 cut-off events. [2024-06-21 16:47:23,193 INFO L125 PetriNetUnfolderBase]: For 74300/74300 co-relation queries the response was YES. [2024-06-21 16:47:23,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6046 conditions, 1201 events. 602/1201 cut-off events. For 74300/74300 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 7291 event pairs, 99 based on Foata normal form. 2/1202 useless extension candidates. Maximal degree in co-relation 5918. Up to 878 conditions per place. [2024-06-21 16:47:23,202 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 174 selfloop transitions, 81 changer transitions 0/258 dead transitions. [2024-06-21 16:47:23,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 258 transitions, 2757 flow [2024-06-21 16:47:23,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:23,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2024-06-21 16:47:23,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41642228739002934 [2024-06-21 16:47:23,204 INFO L175 Difference]: Start difference. First operand has 286 places, 242 transitions, 1963 flow. Second operand 11 states and 142 transitions. [2024-06-21 16:47:23,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 258 transitions, 2757 flow [2024-06-21 16:47:23,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 258 transitions, 2607 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 16:47:23,481 INFO L231 Difference]: Finished difference. Result has 290 places, 244 transitions, 2045 flow [2024-06-21 16:47:23,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2045, PETRI_PLACES=290, PETRI_TRANSITIONS=244} [2024-06-21 16:47:23,482 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2024-06-21 16:47:23,482 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 244 transitions, 2045 flow [2024-06-21 16:47:23,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:23,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:23,482 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 16:47:23,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 16:47:23,482 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 16:47:23,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:23,483 INFO L85 PathProgramCache]: Analyzing trace with hash 883565498, now seen corresponding path program 21 times [2024-06-21 16:47:23,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:23,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632667270] [2024-06-21 16:47:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:23,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:24,577 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 16:47:24,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:24,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632667270] [2024-06-21 16:47:24,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632667270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:24,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:24,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:24,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449724518] [2024-06-21 16:47:24,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:24,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:24,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:24,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:24,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:24,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 244 transitions, 2045 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:24,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:24,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:24,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:25,204 INFO L124 PetriNetUnfolderBase]: 606/1209 cut-off events. [2024-06-21 16:47:25,204 INFO L125 PetriNetUnfolderBase]: For 75887/75887 co-relation queries the response was YES. [2024-06-21 16:47:25,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6179 conditions, 1209 events. 606/1209 cut-off events. For 75887/75887 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 7339 event pairs, 100 based on Foata normal form. 2/1210 useless extension candidates. Maximal degree in co-relation 6049. Up to 956 conditions per place. [2024-06-21 16:47:25,215 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 181 selfloop transitions, 72 changer transitions 0/256 dead transitions. [2024-06-21 16:47:25,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 256 transitions, 2609 flow [2024-06-21 16:47:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:25,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:25,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 16:47:25,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 16:47:25,216 INFO L175 Difference]: Start difference. First operand has 290 places, 244 transitions, 2045 flow. Second operand 11 states and 136 transitions. [2024-06-21 16:47:25,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 256 transitions, 2609 flow [2024-06-21 16:47:25,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 256 transitions, 2459 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 16:47:25,575 INFO L231 Difference]: Finished difference. Result has 294 places, 245 transitions, 2079 flow [2024-06-21 16:47:25,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1905, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2079, PETRI_PLACES=294, PETRI_TRANSITIONS=245} [2024-06-21 16:47:25,576 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 264 predicate places. [2024-06-21 16:47:25,576 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 245 transitions, 2079 flow [2024-06-21 16:47:25,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:25,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:25,576 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 16:47:25,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 16:47:25,577 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 16:47:25,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:25,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1736131462, now seen corresponding path program 22 times [2024-06-21 16:47:25,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:25,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108596853] [2024-06-21 16:47:25,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:25,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:26,594 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 16:47:26,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:26,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108596853] [2024-06-21 16:47:26,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108596853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:26,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:26,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:26,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597066472] [2024-06-21 16:47:26,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:26,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:26,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:26,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:26,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:26,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:26,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 245 transitions, 2079 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:26,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:26,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:26,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:27,128 INFO L124 PetriNetUnfolderBase]: 617/1230 cut-off events. [2024-06-21 16:47:27,128 INFO L125 PetriNetUnfolderBase]: For 86759/86759 co-relation queries the response was YES. [2024-06-21 16:47:27,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6591 conditions, 1230 events. 617/1230 cut-off events. For 86759/86759 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 7490 event pairs, 104 based on Foata normal form. 2/1231 useless extension candidates. Maximal degree in co-relation 6459. Up to 885 conditions per place. [2024-06-21 16:47:27,139 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 180 selfloop transitions, 78 changer transitions 0/261 dead transitions. [2024-06-21 16:47:27,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 261 transitions, 2887 flow [2024-06-21 16:47:27,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:27,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:27,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-21 16:47:27,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 16:47:27,144 INFO L175 Difference]: Start difference. First operand has 294 places, 245 transitions, 2079 flow. Second operand 11 states and 143 transitions. [2024-06-21 16:47:27,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 261 transitions, 2887 flow [2024-06-21 16:47:27,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 261 transitions, 2725 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 16:47:27,424 INFO L231 Difference]: Finished difference. Result has 296 places, 247 transitions, 2147 flow [2024-06-21 16:47:27,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2147, PETRI_PLACES=296, PETRI_TRANSITIONS=247} [2024-06-21 16:47:27,425 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 266 predicate places. [2024-06-21 16:47:27,425 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 247 transitions, 2147 flow [2024-06-21 16:47:27,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:27,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:27,425 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 16:47:27,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 16:47:27,425 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 16:47:27,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:27,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1201333084, now seen corresponding path program 23 times [2024-06-21 16:47:27,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:27,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418820940] [2024-06-21 16:47:27,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:27,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:28,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:28,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418820940] [2024-06-21 16:47:28,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418820940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:28,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:28,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:28,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166339061] [2024-06-21 16:47:28,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:28,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:28,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:28,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:28,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:28,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:28,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 247 transitions, 2147 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:28,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:28,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:28,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:28,865 INFO L124 PetriNetUnfolderBase]: 621/1238 cut-off events. [2024-06-21 16:47:28,865 INFO L125 PetriNetUnfolderBase]: For 88985/88985 co-relation queries the response was YES. [2024-06-21 16:47:28,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6691 conditions, 1238 events. 621/1238 cut-off events. For 88985/88985 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 7541 event pairs, 110 based on Foata normal form. 2/1239 useless extension candidates. Maximal degree in co-relation 6558. Up to 950 conditions per place. [2024-06-21 16:47:28,878 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 180 selfloop transitions, 76 changer transitions 0/259 dead transitions. [2024-06-21 16:47:28,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 259 transitions, 2719 flow [2024-06-21 16:47:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:28,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:28,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 16:47:28,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-21 16:47:28,879 INFO L175 Difference]: Start difference. First operand has 296 places, 247 transitions, 2147 flow. Second operand 11 states and 139 transitions. [2024-06-21 16:47:28,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 259 transitions, 2719 flow [2024-06-21 16:47:29,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 259 transitions, 2573 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 16:47:29,218 INFO L231 Difference]: Finished difference. Result has 300 places, 248 transitions, 2195 flow [2024-06-21 16:47:29,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2195, PETRI_PLACES=300, PETRI_TRANSITIONS=248} [2024-06-21 16:47:29,219 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 270 predicate places. [2024-06-21 16:47:29,219 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 248 transitions, 2195 flow [2024-06-21 16:47:29,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:29,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:29,219 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 16:47:29,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 16:47:29,219 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 16:47:29,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:29,220 INFO L85 PathProgramCache]: Analyzing trace with hash 149108210, now seen corresponding path program 24 times [2024-06-21 16:47:29,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:29,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153735552] [2024-06-21 16:47:29,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:29,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:30,128 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 16:47:30,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:30,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153735552] [2024-06-21 16:47:30,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153735552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:30,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:30,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:30,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775684972] [2024-06-21 16:47:30,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:30,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:30,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:30,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:30,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:30,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:30,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 248 transitions, 2195 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:30,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:30,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:30,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:30,710 INFO L124 PetriNetUnfolderBase]: 618/1233 cut-off events. [2024-06-21 16:47:30,710 INFO L125 PetriNetUnfolderBase]: For 79879/79879 co-relation queries the response was YES. [2024-06-21 16:47:30,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6484 conditions, 1233 events. 618/1233 cut-off events. For 79879/79879 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 7554 event pairs, 107 based on Foata normal form. 2/1234 useless extension candidates. Maximal degree in co-relation 6349. Up to 931 conditions per place. [2024-06-21 16:47:30,721 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 176 selfloop transitions, 81 changer transitions 0/260 dead transitions. [2024-06-21 16:47:30,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 260 transitions, 2735 flow [2024-06-21 16:47:30,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 16:47:30,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-21 16:47:30,722 INFO L175 Difference]: Start difference. First operand has 300 places, 248 transitions, 2195 flow. Second operand 11 states and 139 transitions. [2024-06-21 16:47:30,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 260 transitions, 2735 flow [2024-06-21 16:47:31,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 260 transitions, 2545 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 16:47:31,048 INFO L231 Difference]: Finished difference. Result has 302 places, 248 transitions, 2171 flow [2024-06-21 16:47:31,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2005, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2171, PETRI_PLACES=302, PETRI_TRANSITIONS=248} [2024-06-21 16:47:31,048 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 272 predicate places. [2024-06-21 16:47:31,049 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 248 transitions, 2171 flow [2024-06-21 16:47:31,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:31,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:31,049 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 16:47:31,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 16:47:31,049 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 16:47:31,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:31,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1498610, now seen corresponding path program 25 times [2024-06-21 16:47:31,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:31,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149670038] [2024-06-21 16:47:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:31,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:31,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:31,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149670038] [2024-06-21 16:47:31,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149670038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:31,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:31,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:31,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461611467] [2024-06-21 16:47:31,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:31,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:31,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:31,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:31,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:32,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:32,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 248 transitions, 2171 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:32,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:32,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:32,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:32,425 INFO L124 PetriNetUnfolderBase]: 629/1254 cut-off events. [2024-06-21 16:47:32,425 INFO L125 PetriNetUnfolderBase]: For 91985/91985 co-relation queries the response was YES. [2024-06-21 16:47:32,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6851 conditions, 1254 events. 629/1254 cut-off events. For 91985/91985 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 7666 event pairs, 108 based on Foata normal form. 2/1255 useless extension candidates. Maximal degree in co-relation 6715. Up to 757 conditions per place. [2024-06-21 16:47:32,437 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 170 selfloop transitions, 92 changer transitions 0/265 dead transitions. [2024-06-21 16:47:32,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 265 transitions, 2999 flow [2024-06-21 16:47:32,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:32,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-06-21 16:47:32,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41348973607038125 [2024-06-21 16:47:32,438 INFO L175 Difference]: Start difference. First operand has 302 places, 248 transitions, 2171 flow. Second operand 11 states and 141 transitions. [2024-06-21 16:47:32,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 265 transitions, 2999 flow [2024-06-21 16:47:32,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 265 transitions, 2831 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 16:47:32,806 INFO L231 Difference]: Finished difference. Result has 303 places, 250 transitions, 2265 flow [2024-06-21 16:47:32,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2265, PETRI_PLACES=303, PETRI_TRANSITIONS=250} [2024-06-21 16:47:32,807 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 273 predicate places. [2024-06-21 16:47:32,807 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 250 transitions, 2265 flow [2024-06-21 16:47:32,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:32,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:32,807 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 16:47:32,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 16:47:32,807 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 16:47:32,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:32,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1201327504, now seen corresponding path program 26 times [2024-06-21 16:47:32,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:32,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514324932] [2024-06-21 16:47:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:32,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:33,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:33,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514324932] [2024-06-21 16:47:33,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514324932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:33,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:33,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:33,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432310002] [2024-06-21 16:47:33,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:33,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:33,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:33,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:33,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:33,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:33,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 250 transitions, 2265 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:33,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:33,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:33,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:34,200 INFO L124 PetriNetUnfolderBase]: 633/1262 cut-off events. [2024-06-21 16:47:34,200 INFO L125 PetriNetUnfolderBase]: For 94444/94444 co-relation queries the response was YES. [2024-06-21 16:47:34,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6994 conditions, 1262 events. 633/1262 cut-off events. For 94444/94444 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 7735 event pairs, 112 based on Foata normal form. 2/1263 useless extension candidates. Maximal degree in co-relation 6857. Up to 951 conditions per place. [2024-06-21 16:47:34,212 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 183 selfloop transitions, 78 changer transitions 0/264 dead transitions. [2024-06-21 16:47:34,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 264 transitions, 3045 flow [2024-06-21 16:47:34,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:34,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-06-21 16:47:34,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41348973607038125 [2024-06-21 16:47:34,213 INFO L175 Difference]: Start difference. First operand has 303 places, 250 transitions, 2265 flow. Second operand 11 states and 141 transitions. [2024-06-21 16:47:34,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 264 transitions, 3045 flow [2024-06-21 16:47:34,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 264 transitions, 2897 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 16:47:34,575 INFO L231 Difference]: Finished difference. Result has 307 places, 251 transitions, 2305 flow [2024-06-21 16:47:34,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2305, PETRI_PLACES=307, PETRI_TRANSITIONS=251} [2024-06-21 16:47:34,576 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 277 predicate places. [2024-06-21 16:47:34,576 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 251 transitions, 2305 flow [2024-06-21 16:47:34,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:34,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:34,576 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 16:47:34,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 16:47:34,576 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 16:47:34,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:34,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1208684734, now seen corresponding path program 27 times [2024-06-21 16:47:34,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:34,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522929708] [2024-06-21 16:47:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:34,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:35,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:35,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522929708] [2024-06-21 16:47:35,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522929708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:35,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:35,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:35,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133922579] [2024-06-21 16:47:35,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:35,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:35,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:35,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:35,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:35,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:35,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 251 transitions, 2305 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:35,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:35,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:35,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:35,980 INFO L124 PetriNetUnfolderBase]: 630/1257 cut-off events. [2024-06-21 16:47:35,980 INFO L125 PetriNetUnfolderBase]: For 84953/84953 co-relation queries the response was YES. [2024-06-21 16:47:35,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6785 conditions, 1257 events. 630/1257 cut-off events. For 84953/84953 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 7717 event pairs, 111 based on Foata normal form. 2/1258 useless extension candidates. Maximal degree in co-relation 6646. Up to 969 conditions per place. [2024-06-21 16:47:35,989 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 181 selfloop transitions, 78 changer transitions 0/262 dead transitions. [2024-06-21 16:47:35,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 262 transitions, 2847 flow [2024-06-21 16:47:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:35,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:35,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 16:47:35,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 16:47:35,990 INFO L175 Difference]: Start difference. First operand has 307 places, 251 transitions, 2305 flow. Second operand 11 states and 138 transitions. [2024-06-21 16:47:35,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 262 transitions, 2847 flow [2024-06-21 16:47:36,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 262 transitions, 2645 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-21 16:47:36,397 INFO L231 Difference]: Finished difference. Result has 309 places, 251 transitions, 2263 flow [2024-06-21 16:47:36,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2103, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2263, PETRI_PLACES=309, PETRI_TRANSITIONS=251} [2024-06-21 16:47:36,397 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 279 predicate places. [2024-06-21 16:47:36,398 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 251 transitions, 2263 flow [2024-06-21 16:47:36,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:36,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:36,398 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 16:47:36,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 16:47:36,398 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 16:47:36,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:36,398 INFO L85 PathProgramCache]: Analyzing trace with hash 67460158, now seen corresponding path program 28 times [2024-06-21 16:47:36,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:36,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800882202] [2024-06-21 16:47:36,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:36,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:37,308 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 16:47:37,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:37,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800882202] [2024-06-21 16:47:37,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800882202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:37,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:37,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:37,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637436582] [2024-06-21 16:47:37,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:37,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:37,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:37,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:37,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:37,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:37,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 251 transitions, 2263 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:37,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:37,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:37,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:37,845 INFO L124 PetriNetUnfolderBase]: 637/1270 cut-off events. [2024-06-21 16:47:37,846 INFO L125 PetriNetUnfolderBase]: For 86168/86168 co-relation queries the response was YES. [2024-06-21 16:47:37,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6824 conditions, 1270 events. 637/1270 cut-off events. For 86168/86168 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 7816 event pairs, 113 based on Foata normal form. 2/1271 useless extension candidates. Maximal degree in co-relation 6684. Up to 981 conditions per place. [2024-06-21 16:47:37,857 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 179 selfloop transitions, 83 changer transitions 0/265 dead transitions. [2024-06-21 16:47:37,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 265 transitions, 2867 flow [2024-06-21 16:47:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:37,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:37,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 16:47:37,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 16:47:37,858 INFO L175 Difference]: Start difference. First operand has 309 places, 251 transitions, 2263 flow. Second operand 11 states and 136 transitions. [2024-06-21 16:47:37,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 265 transitions, 2867 flow [2024-06-21 16:47:38,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 265 transitions, 2701 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 16:47:38,218 INFO L231 Difference]: Finished difference. Result has 310 places, 254 transitions, 2325 flow [2024-06-21 16:47:38,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2101, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2325, PETRI_PLACES=310, PETRI_TRANSITIONS=254} [2024-06-21 16:47:38,219 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 280 predicate places. [2024-06-21 16:47:38,219 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 254 transitions, 2325 flow [2024-06-21 16:47:38,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:38,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:38,219 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 16:47:38,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 16:47:38,219 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 16:47:38,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:38,219 INFO L85 PathProgramCache]: Analyzing trace with hash 61890388, now seen corresponding path program 29 times [2024-06-21 16:47:38,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:38,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841004586] [2024-06-21 16:47:38,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:38,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:39,120 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 16:47:39,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:39,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841004586] [2024-06-21 16:47:39,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841004586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:39,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:39,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:39,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767895548] [2024-06-21 16:47:39,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:39,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:39,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:39,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:39,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:39,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:39,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 254 transitions, 2325 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:39,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:39,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:39,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:39,652 INFO L124 PetriNetUnfolderBase]: 641/1278 cut-off events. [2024-06-21 16:47:39,652 INFO L125 PetriNetUnfolderBase]: For 88229/88229 co-relation queries the response was YES. [2024-06-21 16:47:39,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6927 conditions, 1278 events. 641/1278 cut-off events. For 88229/88229 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 7866 event pairs, 111 based on Foata normal form. 2/1279 useless extension candidates. Maximal degree in co-relation 6786. Up to 975 conditions per place. [2024-06-21 16:47:39,665 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 180 selfloop transitions, 84 changer transitions 0/267 dead transitions. [2024-06-21 16:47:39,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 267 transitions, 2911 flow [2024-06-21 16:47:39,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:39,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:39,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 16:47:39,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 16:47:39,666 INFO L175 Difference]: Start difference. First operand has 310 places, 254 transitions, 2325 flow. Second operand 11 states and 138 transitions. [2024-06-21 16:47:39,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 267 transitions, 2911 flow [2024-06-21 16:47:40,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 267 transitions, 2707 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 16:47:40,054 INFO L231 Difference]: Finished difference. Result has 313 places, 255 transitions, 2327 flow [2024-06-21 16:47:40,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2121, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2327, PETRI_PLACES=313, PETRI_TRANSITIONS=255} [2024-06-21 16:47:40,054 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 283 predicate places. [2024-06-21 16:47:40,054 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 255 transitions, 2327 flow [2024-06-21 16:47:40,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:40,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:40,055 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 16:47:40,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 16:47:40,055 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 16:47:40,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:40,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1972817060, now seen corresponding path program 30 times [2024-06-21 16:47:40,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:40,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736037459] [2024-06-21 16:47:40,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:40,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:40,966 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 16:47:40,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:40,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736037459] [2024-06-21 16:47:40,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736037459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:40,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:40,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:40,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911504706] [2024-06-21 16:47:40,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:40,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:40,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:40,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:40,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:41,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:41,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 255 transitions, 2327 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:41,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:41,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:41,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:41,431 INFO L124 PetriNetUnfolderBase]: 638/1273 cut-off events. [2024-06-21 16:47:41,431 INFO L125 PetriNetUnfolderBase]: For 78557/78557 co-relation queries the response was YES. [2024-06-21 16:47:41,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6658 conditions, 1273 events. 638/1273 cut-off events. For 78557/78557 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 7860 event pairs, 114 based on Foata normal form. 2/1274 useless extension candidates. Maximal degree in co-relation 6516. Up to 984 conditions per place. [2024-06-21 16:47:41,444 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 174 selfloop transitions, 89 changer transitions 0/266 dead transitions. [2024-06-21 16:47:41,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 266 transitions, 2877 flow [2024-06-21 16:47:41,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:41,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:41,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 16:47:41,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 16:47:41,444 INFO L175 Difference]: Start difference. First operand has 313 places, 255 transitions, 2327 flow. Second operand 11 states and 136 transitions. [2024-06-21 16:47:41,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 266 transitions, 2877 flow [2024-06-21 16:47:41,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 266 transitions, 2665 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 16:47:41,852 INFO L231 Difference]: Finished difference. Result has 315 places, 255 transitions, 2297 flow [2024-06-21 16:47:41,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2297, PETRI_PLACES=315, PETRI_TRANSITIONS=255} [2024-06-21 16:47:41,853 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 285 predicate places. [2024-06-21 16:47:41,853 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 255 transitions, 2297 flow [2024-06-21 16:47:41,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:41,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:41,853 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 16:47:41,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 16:47:41,853 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 16:47:41,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:41,854 INFO L85 PathProgramCache]: Analyzing trace with hash -866656552, now seen corresponding path program 31 times [2024-06-21 16:47:41,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:41,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793944573] [2024-06-21 16:47:41,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:41,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:42,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:42,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793944573] [2024-06-21 16:47:42,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793944573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:42,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:42,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:42,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838876172] [2024-06-21 16:47:42,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:42,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:42,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:42,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:42,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:42,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:42,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 255 transitions, 2297 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:42,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:42,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:42,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:43,235 INFO L124 PetriNetUnfolderBase]: 642/1281 cut-off events. [2024-06-21 16:47:43,235 INFO L125 PetriNetUnfolderBase]: For 79725/79725 co-relation queries the response was YES. [2024-06-21 16:47:43,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6679 conditions, 1281 events. 642/1281 cut-off events. For 79725/79725 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 7934 event pairs, 110 based on Foata normal form. 2/1282 useless extension candidates. Maximal degree in co-relation 6536. Up to 911 conditions per place. [2024-06-21 16:47:43,247 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 178 selfloop transitions, 89 changer transitions 0/270 dead transitions. [2024-06-21 16:47:43,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 270 transitions, 3107 flow [2024-06-21 16:47:43,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:43,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 16:47:43,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-21 16:47:43,248 INFO L175 Difference]: Start difference. First operand has 315 places, 255 transitions, 2297 flow. Second operand 11 states and 139 transitions. [2024-06-21 16:47:43,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 270 transitions, 3107 flow [2024-06-21 16:47:43,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 270 transitions, 2913 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 16:47:43,606 INFO L231 Difference]: Finished difference. Result has 315 places, 256 transitions, 2319 flow [2024-06-21 16:47:43,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2103, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2319, PETRI_PLACES=315, PETRI_TRANSITIONS=256} [2024-06-21 16:47:43,606 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 285 predicate places. [2024-06-21 16:47:43,606 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 256 transitions, 2319 flow [2024-06-21 16:47:43,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:43,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:43,606 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 16:47:43,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 16:47:43,606 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 16:47:43,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:43,607 INFO L85 PathProgramCache]: Analyzing trace with hash -667003222, now seen corresponding path program 32 times [2024-06-21 16:47:43,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:43,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342690843] [2024-06-21 16:47:43,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:43,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:44,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:44,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342690843] [2024-06-21 16:47:44,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342690843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:44,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:44,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:44,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688009585] [2024-06-21 16:47:44,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:44,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:44,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:44,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:44,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:44,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:44,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 256 transitions, 2319 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:44,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:44,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:44,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:45,267 INFO L124 PetriNetUnfolderBase]: 649/1296 cut-off events. [2024-06-21 16:47:45,268 INFO L125 PetriNetUnfolderBase]: For 81825/81825 co-relation queries the response was YES. [2024-06-21 16:47:45,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6820 conditions, 1296 events. 649/1296 cut-off events. For 81825/81825 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 8047 event pairs, 116 based on Foata normal form. 2/1297 useless extension candidates. Maximal degree in co-relation 6676. Up to 1004 conditions per place. [2024-06-21 16:47:45,280 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 184 selfloop transitions, 83 changer transitions 0/270 dead transitions. [2024-06-21 16:47:45,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 270 transitions, 2939 flow [2024-06-21 16:47:45,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:45,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:45,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 16:47:45,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 16:47:45,281 INFO L175 Difference]: Start difference. First operand has 315 places, 256 transitions, 2319 flow. Second operand 11 states and 138 transitions. [2024-06-21 16:47:45,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 270 transitions, 2939 flow [2024-06-21 16:47:45,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 270 transitions, 2579 flow, removed 19 selfloop flow, removed 11 redundant places. [2024-06-21 16:47:45,652 INFO L231 Difference]: Finished difference. Result has 315 places, 259 transitions, 2193 flow [2024-06-21 16:47:45,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1973, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2193, PETRI_PLACES=315, PETRI_TRANSITIONS=259} [2024-06-21 16:47:45,652 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 285 predicate places. [2024-06-21 16:47:45,652 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 259 transitions, 2193 flow [2024-06-21 16:47:45,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:45,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:45,652 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 16:47:45,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 16:47:45,652 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 16:47:45,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:45,653 INFO L85 PathProgramCache]: Analyzing trace with hash -667210612, now seen corresponding path program 33 times [2024-06-21 16:47:45,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:45,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202160706] [2024-06-21 16:47:45,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:45,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:46,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:46,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202160706] [2024-06-21 16:47:46,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202160706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:46,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:46,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:46,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801097236] [2024-06-21 16:47:46,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:46,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:46,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:46,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:46,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:46,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:46,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 259 transitions, 2193 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:46,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:46,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:46,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:47,089 INFO L124 PetriNetUnfolderBase]: 653/1304 cut-off events. [2024-06-21 16:47:47,089 INFO L125 PetriNetUnfolderBase]: For 82983/82983 co-relation queries the response was YES. [2024-06-21 16:47:47,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6519 conditions, 1304 events. 653/1304 cut-off events. For 82983/82983 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 8105 event pairs, 114 based on Foata normal form. 2/1305 useless extension candidates. Maximal degree in co-relation 6376. Up to 989 conditions per place. [2024-06-21 16:47:47,103 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 185 selfloop transitions, 85 changer transitions 0/273 dead transitions. [2024-06-21 16:47:47,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 273 transitions, 3009 flow [2024-06-21 16:47:47,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:47,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-21 16:47:47,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41055718475073316 [2024-06-21 16:47:47,104 INFO L175 Difference]: Start difference. First operand has 315 places, 259 transitions, 2193 flow. Second operand 11 states and 140 transitions. [2024-06-21 16:47:47,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 273 transitions, 3009 flow [2024-06-21 16:47:47,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 273 transitions, 2811 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 16:47:47,467 INFO L231 Difference]: Finished difference. Result has 318 places, 260 transitions, 2201 flow [2024-06-21 16:47:47,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2201, PETRI_PLACES=318, PETRI_TRANSITIONS=260} [2024-06-21 16:47:47,468 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 288 predicate places. [2024-06-21 16:47:47,468 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 260 transitions, 2201 flow [2024-06-21 16:47:47,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:47,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:47,468 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 16:47:47,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 16:47:47,468 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 16:47:47,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:47,469 INFO L85 PathProgramCache]: Analyzing trace with hash -659853382, now seen corresponding path program 34 times [2024-06-21 16:47:47,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:47,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387942710] [2024-06-21 16:47:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:47,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:48,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:48,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387942710] [2024-06-21 16:47:48,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387942710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:48,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:48,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:48,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297233011] [2024-06-21 16:47:48,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:48,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:48,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:48,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:48,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:48,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:48,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 260 transitions, 2201 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:48,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:48,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:48,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:48,661 INFO L124 PetriNetUnfolderBase]: 650/1299 cut-off events. [2024-06-21 16:47:48,661 INFO L125 PetriNetUnfolderBase]: For 72317/72317 co-relation queries the response was YES. [2024-06-21 16:47:48,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6234 conditions, 1299 events. 650/1299 cut-off events. For 72317/72317 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 8073 event pairs, 110 based on Foata normal form. 2/1300 useless extension candidates. Maximal degree in co-relation 6090. Up to 1042 conditions per place. [2024-06-21 16:47:48,672 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 194 selfloop transitions, 74 changer transitions 0/271 dead transitions. [2024-06-21 16:47:48,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 271 transitions, 2761 flow [2024-06-21 16:47:48,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:48,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:48,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 16:47:48,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 16:47:48,673 INFO L175 Difference]: Start difference. First operand has 318 places, 260 transitions, 2201 flow. Second operand 11 states and 136 transitions. [2024-06-21 16:47:48,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 271 transitions, 2761 flow [2024-06-21 16:47:48,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 271 transitions, 2467 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-06-21 16:47:48,999 INFO L231 Difference]: Finished difference. Result has 319 places, 260 transitions, 2059 flow [2024-06-21 16:47:48,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1907, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2059, PETRI_PLACES=319, PETRI_TRANSITIONS=260} [2024-06-21 16:47:48,999 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 289 predicate places. [2024-06-21 16:47:49,000 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 260 transitions, 2059 flow [2024-06-21 16:47:49,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:49,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:49,000 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 16:47:49,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 16:47:49,000 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 16:47:49,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:49,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1028016834, now seen corresponding path program 8 times [2024-06-21 16:47:49,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:49,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127662255] [2024-06-21 16:47:49,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:49,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:50,234 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 16:47:50,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:50,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127662255] [2024-06-21 16:47:50,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127662255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:50,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:50,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:47:50,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559465605] [2024-06-21 16:47:50,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:50,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:47:50,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:50,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:47:50,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:47:50,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:50,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 260 transitions, 2059 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:50,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:50,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:50,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:50,909 INFO L124 PetriNetUnfolderBase]: 662/1327 cut-off events. [2024-06-21 16:47:50,909 INFO L125 PetriNetUnfolderBase]: For 106620/106620 co-relation queries the response was YES. [2024-06-21 16:47:50,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6168 conditions, 1327 events. 662/1327 cut-off events. For 106620/106620 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 8306 event pairs, 119 based on Foata normal form. 8/1334 useless extension candidates. Maximal degree in co-relation 6024. Up to 1006 conditions per place. [2024-06-21 16:47:50,923 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 186 selfloop transitions, 77 changer transitions 9/275 dead transitions. [2024-06-21 16:47:50,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 275 transitions, 2705 flow [2024-06-21 16:47:50,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:47:50,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:47:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2024-06-21 16:47:50,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 16:47:50,924 INFO L175 Difference]: Start difference. First operand has 319 places, 260 transitions, 2059 flow. Second operand 12 states and 152 transitions. [2024-06-21 16:47:50,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 275 transitions, 2705 flow [2024-06-21 16:47:51,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 275 transitions, 2538 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 16:47:51,246 INFO L231 Difference]: Finished difference. Result has 320 places, 257 transitions, 2032 flow [2024-06-21 16:47:51,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1892, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2032, PETRI_PLACES=320, PETRI_TRANSITIONS=257} [2024-06-21 16:47:51,246 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 290 predicate places. [2024-06-21 16:47:51,246 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 257 transitions, 2032 flow [2024-06-21 16:47:51,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:51,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:51,247 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 16:47:51,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 16:47:51,247 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 16:47:51,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:51,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1221956244, now seen corresponding path program 9 times [2024-06-21 16:47:51,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:51,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020633452] [2024-06-21 16:47:51,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:51,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:52,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:52,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020633452] [2024-06-21 16:47:52,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020633452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:52,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:52,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:47:52,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267335282] [2024-06-21 16:47:52,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:52,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:47:52,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:52,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:47:52,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:47:52,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:52,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 257 transitions, 2032 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:52,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:52,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:52,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:53,028 INFO L124 PetriNetUnfolderBase]: 657/1320 cut-off events. [2024-06-21 16:47:53,028 INFO L125 PetriNetUnfolderBase]: For 109734/109734 co-relation queries the response was YES. [2024-06-21 16:47:53,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6140 conditions, 1320 events. 657/1320 cut-off events. For 109734/109734 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 8293 event pairs, 119 based on Foata normal form. 8/1327 useless extension candidates. Maximal degree in co-relation 5995. Up to 999 conditions per place. [2024-06-21 16:47:53,040 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 183 selfloop transitions, 77 changer transitions 9/272 dead transitions. [2024-06-21 16:47:53,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 272 transitions, 2672 flow [2024-06-21 16:47:53,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:47:53,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:47:53,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 151 transitions. [2024-06-21 16:47:53,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40591397849462363 [2024-06-21 16:47:53,041 INFO L175 Difference]: Start difference. First operand has 320 places, 257 transitions, 2032 flow. Second operand 12 states and 151 transitions. [2024-06-21 16:47:53,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 272 transitions, 2672 flow [2024-06-21 16:47:53,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 272 transitions, 2506 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 16:47:53,386 INFO L231 Difference]: Finished difference. Result has 318 places, 254 transitions, 2010 flow [2024-06-21 16:47:53,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1870, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2010, PETRI_PLACES=318, PETRI_TRANSITIONS=254} [2024-06-21 16:47:53,387 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 288 predicate places. [2024-06-21 16:47:53,387 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 254 transitions, 2010 flow [2024-06-21 16:47:53,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:53,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:53,387 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 16:47:53,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 16:47:53,388 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 16:47:53,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:53,388 INFO L85 PathProgramCache]: Analyzing trace with hash 169736950, now seen corresponding path program 10 times [2024-06-21 16:47:53,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:53,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446590249] [2024-06-21 16:47:53,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:53,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:54,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:54,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446590249] [2024-06-21 16:47:54,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446590249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:54,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:54,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:47:54,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210809743] [2024-06-21 16:47:54,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:54,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:47:54,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:54,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:47:54,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:47:54,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:54,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 254 transitions, 2010 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:54,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:54,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:54,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:55,348 INFO L124 PetriNetUnfolderBase]: 652/1313 cut-off events. [2024-06-21 16:47:55,348 INFO L125 PetriNetUnfolderBase]: For 107913/107913 co-relation queries the response was YES. [2024-06-21 16:47:55,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6083 conditions, 1313 events. 652/1313 cut-off events. For 107913/107913 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 8195 event pairs, 121 based on Foata normal form. 8/1320 useless extension candidates. Maximal degree in co-relation 5939. Up to 982 conditions per place. [2024-06-21 16:47:55,359 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 175 selfloop transitions, 78 changer transitions 13/269 dead transitions. [2024-06-21 16:47:55,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 269 transitions, 2640 flow [2024-06-21 16:47:55,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:47:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:47:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2024-06-21 16:47:55,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 16:47:55,360 INFO L175 Difference]: Start difference. First operand has 318 places, 254 transitions, 2010 flow. Second operand 12 states and 150 transitions. [2024-06-21 16:47:55,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 269 transitions, 2640 flow [2024-06-21 16:47:55,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 269 transitions, 2474 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 16:47:55,660 INFO L231 Difference]: Finished difference. Result has 316 places, 248 transitions, 1973 flow [2024-06-21 16:47:55,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1973, PETRI_PLACES=316, PETRI_TRANSITIONS=248} [2024-06-21 16:47:55,661 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 286 predicate places. [2024-06-21 16:47:55,661 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 248 transitions, 1973 flow [2024-06-21 16:47:55,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:55,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:55,661 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 16:47:55,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 16:47:55,661 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 16:47:55,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:55,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1965675156, now seen corresponding path program 11 times [2024-06-21 16:47:55,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:55,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942746136] [2024-06-21 16:47:55,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:55,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:56,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:56,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942746136] [2024-06-21 16:47:56,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942746136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:56,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:56,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:47:56,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129156301] [2024-06-21 16:47:56,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:56,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:47:56,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:56,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:47:56,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:47:57,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:57,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 248 transitions, 1973 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:57,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:57,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:57,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:57,490 INFO L124 PetriNetUnfolderBase]: 643/1298 cut-off events. [2024-06-21 16:47:57,491 INFO L125 PetriNetUnfolderBase]: For 106112/106112 co-relation queries the response was YES. [2024-06-21 16:47:57,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6000 conditions, 1298 events. 643/1298 cut-off events. For 106112/106112 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 8142 event pairs, 119 based on Foata normal form. 8/1305 useless extension candidates. Maximal degree in co-relation 5857. Up to 980 conditions per place. [2024-06-21 16:47:57,502 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 168 selfloop transitions, 85 changer transitions 9/265 dead transitions. [2024-06-21 16:47:57,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 265 transitions, 2601 flow [2024-06-21 16:47:57,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:47:57,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:47:57,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-06-21 16:47:57,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-06-21 16:47:57,503 INFO L175 Difference]: Start difference. First operand has 316 places, 248 transitions, 1973 flow. Second operand 12 states and 147 transitions. [2024-06-21 16:47:57,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 265 transitions, 2601 flow [2024-06-21 16:47:57,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 265 transitions, 2431 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 16:47:57,769 INFO L231 Difference]: Finished difference. Result has 312 places, 247 transitions, 1975 flow [2024-06-21 16:47:57,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1975, PETRI_PLACES=312, PETRI_TRANSITIONS=247} [2024-06-21 16:47:57,770 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 282 predicate places. [2024-06-21 16:47:57,770 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 247 transitions, 1975 flow [2024-06-21 16:47:57,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:57,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:57,770 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 16:47:57,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 16:47:57,771 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 16:47:57,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:57,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1942942568, now seen corresponding path program 12 times [2024-06-21 16:47:57,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:57,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88106456] [2024-06-21 16:47:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:57,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:58,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:58,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88106456] [2024-06-21 16:47:58,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88106456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:58,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:58,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:47:58,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455460685] [2024-06-21 16:47:58,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:58,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:47:58,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:58,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:47:58,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:47:59,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:47:59,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 247 transitions, 1975 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:59,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:59,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:47:59,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:59,470 INFO L124 PetriNetUnfolderBase]: 638/1295 cut-off events. [2024-06-21 16:47:59,470 INFO L125 PetriNetUnfolderBase]: For 102339/102339 co-relation queries the response was YES. [2024-06-21 16:47:59,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5963 conditions, 1295 events. 638/1295 cut-off events. For 102339/102339 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 8137 event pairs, 121 based on Foata normal form. 8/1302 useless extension candidates. Maximal degree in co-relation 5821. Up to 963 conditions per place. [2024-06-21 16:47:59,479 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 174 selfloop transitions, 72 changer transitions 13/262 dead transitions. [2024-06-21 16:47:59,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 262 transitions, 2583 flow [2024-06-21 16:47:59,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:47:59,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:47:59,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 151 transitions. [2024-06-21 16:47:59,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40591397849462363 [2024-06-21 16:47:59,480 INFO L175 Difference]: Start difference. First operand has 312 places, 247 transitions, 1975 flow. Second operand 12 states and 151 transitions. [2024-06-21 16:47:59,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 262 transitions, 2583 flow [2024-06-21 16:47:59,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 262 transitions, 2407 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 16:47:59,759 INFO L231 Difference]: Finished difference. Result has 311 places, 241 transitions, 1914 flow [2024-06-21 16:47:59,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1799, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1914, PETRI_PLACES=311, PETRI_TRANSITIONS=241} [2024-06-21 16:47:59,760 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 281 predicate places. [2024-06-21 16:47:59,760 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 241 transitions, 1914 flow [2024-06-21 16:47:59,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:59,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:59,760 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 16:47:59,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 16:47:59,760 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 16:47:59,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:59,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1943211338, now seen corresponding path program 13 times [2024-06-21 16:47:59,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:59,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368701348] [2024-06-21 16:47:59,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:59,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:00,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:00,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368701348] [2024-06-21 16:48:00,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368701348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:00,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:00,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:00,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41167176] [2024-06-21 16:48:00,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:00,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:00,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:00,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:00,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:00,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:00,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 241 transitions, 1914 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:00,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:00,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:00,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:01,324 INFO L124 PetriNetUnfolderBase]: 644/1311 cut-off events. [2024-06-21 16:48:01,324 INFO L125 PetriNetUnfolderBase]: For 134402/134402 co-relation queries the response was YES. [2024-06-21 16:48:01,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6914 conditions, 1311 events. 644/1311 cut-off events. For 134402/134402 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 8207 event pairs, 124 based on Foata normal form. 6/1316 useless extension candidates. Maximal degree in co-relation 6773. Up to 958 conditions per place. [2024-06-21 16:48:01,336 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 185 selfloop transitions, 66 changer transitions 6/260 dead transitions. [2024-06-21 16:48:01,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 260 transitions, 2776 flow [2024-06-21 16:48:01,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:01,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 153 transitions. [2024-06-21 16:48:01,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112903225806452 [2024-06-21 16:48:01,337 INFO L175 Difference]: Start difference. First operand has 311 places, 241 transitions, 1914 flow. Second operand 12 states and 153 transitions. [2024-06-21 16:48:01,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 260 transitions, 2776 flow [2024-06-21 16:48:01,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 260 transitions, 2610 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-21 16:48:01,772 INFO L231 Difference]: Finished difference. Result has 306 places, 239 transitions, 1885 flow [2024-06-21 16:48:01,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1885, PETRI_PLACES=306, PETRI_TRANSITIONS=239} [2024-06-21 16:48:01,772 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 276 predicate places. [2024-06-21 16:48:01,772 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 239 transitions, 1885 flow [2024-06-21 16:48:01,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:01,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:01,772 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 16:48:01,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 16:48:01,772 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 16:48:01,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:01,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1229365554, now seen corresponding path program 14 times [2024-06-21 16:48:01,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:01,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609905375] [2024-06-21 16:48:01,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:01,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:02,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:02,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609905375] [2024-06-21 16:48:02,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609905375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:02,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:02,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:02,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829925202] [2024-06-21 16:48:02,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:02,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:02,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:02,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:02,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:02,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:02,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 239 transitions, 1885 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:02,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:02,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:02,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:03,143 INFO L124 PetriNetUnfolderBase]: 635/1292 cut-off events. [2024-06-21 16:48:03,143 INFO L125 PetriNetUnfolderBase]: For 129227/129227 co-relation queries the response was YES. [2024-06-21 16:48:03,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6519 conditions, 1292 events. 635/1292 cut-off events. For 129227/129227 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 8030 event pairs, 132 based on Foata normal form. 8/1299 useless extension candidates. Maximal degree in co-relation 6380. Up to 976 conditions per place. [2024-06-21 16:48:03,154 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 169 selfloop transitions, 70 changer transitions 12/254 dead transitions. [2024-06-21 16:48:03,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 254 transitions, 2473 flow [2024-06-21 16:48:03,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-21 16:48:03,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 16:48:03,155 INFO L175 Difference]: Start difference. First operand has 306 places, 239 transitions, 1885 flow. Second operand 12 states and 148 transitions. [2024-06-21 16:48:03,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 254 transitions, 2473 flow [2024-06-21 16:48:03,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 254 transitions, 2341 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 16:48:03,561 INFO L231 Difference]: Finished difference. Result has 305 places, 234 transitions, 1867 flow [2024-06-21 16:48:03,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1753, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1867, PETRI_PLACES=305, PETRI_TRANSITIONS=234} [2024-06-21 16:48:03,562 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 275 predicate places. [2024-06-21 16:48:03,562 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 234 transitions, 1867 flow [2024-06-21 16:48:03,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:03,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:03,562 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 16:48:03,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 16:48:03,562 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 16:48:03,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:03,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1972824996, now seen corresponding path program 15 times [2024-06-21 16:48:03,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:03,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315009743] [2024-06-21 16:48:03,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:03,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:04,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:04,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315009743] [2024-06-21 16:48:04,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315009743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:04,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:04,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:04,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87022825] [2024-06-21 16:48:04,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:04,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:04,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:04,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:04,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:04,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:04,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 234 transitions, 1867 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:04,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:04,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:04,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:05,076 INFO L124 PetriNetUnfolderBase]: 628/1277 cut-off events. [2024-06-21 16:48:05,076 INFO L125 PetriNetUnfolderBase]: For 127947/127947 co-relation queries the response was YES. [2024-06-21 16:48:05,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6469 conditions, 1277 events. 628/1277 cut-off events. For 127947/127947 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 7904 event pairs, 127 based on Foata normal form. 8/1284 useless extension candidates. Maximal degree in co-relation 6331. Up to 994 conditions per place. [2024-06-21 16:48:05,088 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 166 selfloop transitions, 67 changer transitions 13/249 dead transitions. [2024-06-21 16:48:05,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 249 transitions, 2445 flow [2024-06-21 16:48:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:05,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:05,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-21 16:48:05,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 16:48:05,089 INFO L175 Difference]: Start difference. First operand has 305 places, 234 transitions, 1867 flow. Second operand 12 states and 148 transitions. [2024-06-21 16:48:05,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 249 transitions, 2445 flow [2024-06-21 16:48:05,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 249 transitions, 2287 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 16:48:05,454 INFO L231 Difference]: Finished difference. Result has 300 places, 228 transitions, 1818 flow [2024-06-21 16:48:05,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1818, PETRI_PLACES=300, PETRI_TRANSITIONS=228} [2024-06-21 16:48:05,455 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 270 predicate places. [2024-06-21 16:48:05,455 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 228 transitions, 1818 flow [2024-06-21 16:48:05,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:05,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:05,455 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 16:48:05,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 16:48:05,455 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 16:48:05,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:05,455 INFO L85 PathProgramCache]: Analyzing trace with hash 67468094, now seen corresponding path program 16 times [2024-06-21 16:48:05,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:05,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632161825] [2024-06-21 16:48:05,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:05,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:06,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:06,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632161825] [2024-06-21 16:48:06,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632161825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:06,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:06,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:06,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166717471] [2024-06-21 16:48:06,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:06,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:06,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:06,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:06,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:06,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:06,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 228 transitions, 1818 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:06,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:06,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:06,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:07,313 INFO L124 PetriNetUnfolderBase]: 619/1260 cut-off events. [2024-06-21 16:48:07,314 INFO L125 PetriNetUnfolderBase]: For 122488/122488 co-relation queries the response was YES. [2024-06-21 16:48:07,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6338 conditions, 1260 events. 619/1260 cut-off events. For 122488/122488 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 7776 event pairs, 132 based on Foata normal form. 8/1267 useless extension candidates. Maximal degree in co-relation 6202. Up to 957 conditions per place. [2024-06-21 16:48:07,322 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 161 selfloop transitions, 72 changer transitions 9/245 dead transitions. [2024-06-21 16:48:07,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 245 transitions, 2392 flow [2024-06-21 16:48:07,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:07,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:07,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-21 16:48:07,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 16:48:07,323 INFO L175 Difference]: Start difference. First operand has 300 places, 228 transitions, 1818 flow. Second operand 12 states and 148 transitions. [2024-06-21 16:48:07,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 245 transitions, 2392 flow [2024-06-21 16:48:07,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 245 transitions, 2248 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 16:48:07,658 INFO L231 Difference]: Finished difference. Result has 296 places, 227 transitions, 1816 flow [2024-06-21 16:48:07,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1674, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1816, PETRI_PLACES=296, PETRI_TRANSITIONS=227} [2024-06-21 16:48:07,659 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 266 predicate places. [2024-06-21 16:48:07,659 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 227 transitions, 1816 flow [2024-06-21 16:48:07,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:07,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:07,659 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 16:48:07,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 16:48:07,659 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 16:48:07,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:07,659 INFO L85 PathProgramCache]: Analyzing trace with hash 261407504, now seen corresponding path program 17 times [2024-06-21 16:48:07,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:07,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816654751] [2024-06-21 16:48:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:07,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:08,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:08,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816654751] [2024-06-21 16:48:08,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816654751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:08,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:08,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:08,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952629684] [2024-06-21 16:48:08,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:08,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:08,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:08,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:08,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:08,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:08,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 227 transitions, 1816 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:08,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:08,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:08,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:09,387 INFO L124 PetriNetUnfolderBase]: 617/1258 cut-off events. [2024-06-21 16:48:09,388 INFO L125 PetriNetUnfolderBase]: For 120188/120188 co-relation queries the response was YES. [2024-06-21 16:48:09,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6318 conditions, 1258 events. 617/1258 cut-off events. For 120188/120188 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 7797 event pairs, 132 based on Foata normal form. 8/1265 useless extension candidates. Maximal degree in co-relation 6183. Up to 955 conditions per place. [2024-06-21 16:48:09,400 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 162 selfloop transitions, 70 changer transitions 9/244 dead transitions. [2024-06-21 16:48:09,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 244 transitions, 2392 flow [2024-06-21 16:48:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:09,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2024-06-21 16:48:09,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 16:48:09,401 INFO L175 Difference]: Start difference. First operand has 296 places, 227 transitions, 1816 flow. Second operand 12 states and 150 transitions. [2024-06-21 16:48:09,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 244 transitions, 2392 flow [2024-06-21 16:48:09,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 244 transitions, 2238 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 16:48:09,723 INFO L231 Difference]: Finished difference. Result has 296 places, 226 transitions, 1804 flow [2024-06-21 16:48:09,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1666, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1804, PETRI_PLACES=296, PETRI_TRANSITIONS=226} [2024-06-21 16:48:09,723 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 266 predicate places. [2024-06-21 16:48:09,724 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 226 transitions, 1804 flow [2024-06-21 16:48:09,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:09,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:09,724 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 16:48:09,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 16:48:09,724 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 16:48:09,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:09,724 INFO L85 PathProgramCache]: Analyzing trace with hash 268816814, now seen corresponding path program 18 times [2024-06-21 16:48:09,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:09,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151345010] [2024-06-21 16:48:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:09,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:10,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:10,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151345010] [2024-06-21 16:48:10,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151345010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:10,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:10,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:10,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096370368] [2024-06-21 16:48:10,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:10,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:10,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:10,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:10,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:10,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:10,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 226 transitions, 1804 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:10,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:10,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:10,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:11,165 INFO L124 PetriNetUnfolderBase]: 612/1251 cut-off events. [2024-06-21 16:48:11,166 INFO L125 PetriNetUnfolderBase]: For 120184/120184 co-relation queries the response was YES. [2024-06-21 16:48:11,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6282 conditions, 1251 events. 612/1251 cut-off events. For 120184/120184 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 7739 event pairs, 132 based on Foata normal form. 8/1258 useless extension candidates. Maximal degree in co-relation 6147. Up to 942 conditions per place. [2024-06-21 16:48:11,176 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 156 selfloop transitions, 73 changer transitions 9/241 dead transitions. [2024-06-21 16:48:11,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 241 transitions, 2360 flow [2024-06-21 16:48:11,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:11,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2024-06-21 16:48:11,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 16:48:11,178 INFO L175 Difference]: Start difference. First operand has 296 places, 226 transitions, 1804 flow. Second operand 12 states and 150 transitions. [2024-06-21 16:48:11,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 241 transitions, 2360 flow [2024-06-21 16:48:11,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 241 transitions, 2214 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 16:48:11,504 INFO L231 Difference]: Finished difference. Result has 295 places, 223 transitions, 1791 flow [2024-06-21 16:48:11,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1791, PETRI_PLACES=295, PETRI_TRANSITIONS=223} [2024-06-21 16:48:11,505 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 265 predicate places. [2024-06-21 16:48:11,505 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 223 transitions, 1791 flow [2024-06-21 16:48:11,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:11,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:11,505 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 16:48:11,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 16:48:11,505 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 16:48:11,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:11,506 INFO L85 PathProgramCache]: Analyzing trace with hash 268557344, now seen corresponding path program 19 times [2024-06-21 16:48:11,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:11,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765251946] [2024-06-21 16:48:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:11,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:12,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:12,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765251946] [2024-06-21 16:48:12,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765251946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:12,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:12,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:12,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395050965] [2024-06-21 16:48:12,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:12,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:12,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:12,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:12,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:12,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:12,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 223 transitions, 1791 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:12,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:12,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:12,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:13,000 INFO L124 PetriNetUnfolderBase]: 607/1246 cut-off events. [2024-06-21 16:48:13,001 INFO L125 PetriNetUnfolderBase]: For 120107/120107 co-relation queries the response was YES. [2024-06-21 16:48:13,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6261 conditions, 1246 events. 607/1246 cut-off events. For 120107/120107 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 7692 event pairs, 129 based on Foata normal form. 8/1253 useless extension candidates. Maximal degree in co-relation 6127. Up to 966 conditions per place. [2024-06-21 16:48:13,012 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 164 selfloop transitions, 58 changer transitions 13/238 dead transitions. [2024-06-21 16:48:13,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 238 transitions, 2341 flow [2024-06-21 16:48:13,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:13,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-06-21 16:48:13,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40053763440860213 [2024-06-21 16:48:13,013 INFO L175 Difference]: Start difference. First operand has 295 places, 223 transitions, 1791 flow. Second operand 12 states and 149 transitions. [2024-06-21 16:48:13,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 238 transitions, 2341 flow [2024-06-21 16:48:13,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 238 transitions, 2183 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 16:48:13,365 INFO L231 Difference]: Finished difference. Result has 293 places, 217 transitions, 1722 flow [2024-06-21 16:48:13,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1722, PETRI_PLACES=293, PETRI_TRANSITIONS=217} [2024-06-21 16:48:13,366 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 263 predicate places. [2024-06-21 16:48:13,366 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 217 transitions, 1722 flow [2024-06-21 16:48:13,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:13,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:13,366 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 16:48:13,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 16:48:13,366 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 16:48:13,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:13,367 INFO L85 PathProgramCache]: Analyzing trace with hash 268826114, now seen corresponding path program 20 times [2024-06-21 16:48:13,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:13,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101857643] [2024-06-21 16:48:13,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:13,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:14,423 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 16:48:14,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:14,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101857643] [2024-06-21 16:48:14,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101857643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:14,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:14,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:14,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809008102] [2024-06-21 16:48:14,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:14,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:14,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:14,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:14,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:14,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:14,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 217 transitions, 1722 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:14,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:14,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:14,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:14,923 INFO L124 PetriNetUnfolderBase]: 591/1216 cut-off events. [2024-06-21 16:48:14,923 INFO L125 PetriNetUnfolderBase]: For 107916/107916 co-relation queries the response was YES. [2024-06-21 16:48:14,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6069 conditions, 1216 events. 591/1216 cut-off events. For 107916/107916 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 7509 event pairs, 128 based on Foata normal form. 6/1221 useless extension candidates. Maximal degree in co-relation 5936. Up to 918 conditions per place. [2024-06-21 16:48:14,939 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 152 selfloop transitions, 66 changer transitions 11/232 dead transitions. [2024-06-21 16:48:14,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 232 transitions, 2242 flow [2024-06-21 16:48:14,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:14,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:14,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 16:48:14,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924731182795699 [2024-06-21 16:48:14,941 INFO L175 Difference]: Start difference. First operand has 293 places, 217 transitions, 1722 flow. Second operand 12 states and 146 transitions. [2024-06-21 16:48:14,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 232 transitions, 2242 flow [2024-06-21 16:48:15,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 232 transitions, 2118 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 16:48:15,422 INFO L231 Difference]: Finished difference. Result has 288 places, 213 transitions, 1710 flow [2024-06-21 16:48:15,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1598, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1710, PETRI_PLACES=288, PETRI_TRANSITIONS=213} [2024-06-21 16:48:15,422 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 258 predicate places. [2024-06-21 16:48:15,422 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 213 transitions, 1710 flow [2024-06-21 16:48:15,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:15,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:15,422 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 16:48:15,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 16:48:15,422 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 16:48:15,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:15,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1952671052, now seen corresponding path program 21 times [2024-06-21 16:48:15,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:15,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532877267] [2024-06-21 16:48:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:15,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:16,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:16,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532877267] [2024-06-21 16:48:16,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532877267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:16,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:16,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:16,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247220251] [2024-06-21 16:48:16,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:16,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:16,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:16,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:16,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:16,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:16,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 213 transitions, 1710 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:16,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:16,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:16,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:16,835 INFO L124 PetriNetUnfolderBase]: 587/1208 cut-off events. [2024-06-21 16:48:16,835 INFO L125 PetriNetUnfolderBase]: For 115725/115725 co-relation queries the response was YES. [2024-06-21 16:48:16,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6058 conditions, 1208 events. 587/1208 cut-off events. For 115725/115725 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 7397 event pairs, 134 based on Foata normal form. 8/1215 useless extension candidates. Maximal degree in co-relation 5927. Up to 908 conditions per place. [2024-06-21 16:48:16,843 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 141 selfloop transitions, 75 changer transitions 9/228 dead transitions. [2024-06-21 16:48:16,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 228 transitions, 2236 flow [2024-06-21 16:48:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:16,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:16,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-06-21 16:48:16,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-06-21 16:48:16,844 INFO L175 Difference]: Start difference. First operand has 288 places, 213 transitions, 1710 flow. Second operand 12 states and 147 transitions. [2024-06-21 16:48:16,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 228 transitions, 2236 flow [2024-06-21 16:48:17,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 228 transitions, 2090 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 16:48:17,150 INFO L231 Difference]: Finished difference. Result has 283 places, 210 transitions, 1707 flow [2024-06-21 16:48:17,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1707, PETRI_PLACES=283, PETRI_TRANSITIONS=210} [2024-06-21 16:48:17,150 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 253 predicate places. [2024-06-21 16:48:17,150 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 210 transitions, 1707 flow [2024-06-21 16:48:17,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:17,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:17,150 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 16:48:17,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 16:48:17,151 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 16:48:17,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:17,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1973093766, now seen corresponding path program 22 times [2024-06-21 16:48:17,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:17,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557711748] [2024-06-21 16:48:17,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:17,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:18,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:18,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557711748] [2024-06-21 16:48:18,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557711748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:18,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:18,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:18,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757865292] [2024-06-21 16:48:18,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:18,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:18,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:18,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:18,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:18,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:18,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 210 transitions, 1707 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:18,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:18,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:18,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:18,747 INFO L124 PetriNetUnfolderBase]: 578/1195 cut-off events. [2024-06-21 16:48:18,747 INFO L125 PetriNetUnfolderBase]: For 101877/101877 co-relation queries the response was YES. [2024-06-21 16:48:18,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5962 conditions, 1195 events. 578/1195 cut-off events. For 101877/101877 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7302 event pairs, 130 based on Foata normal form. 6/1200 useless extension candidates. Maximal degree in co-relation 5833. Up to 898 conditions per place. [2024-06-21 16:48:18,757 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 139 selfloop transitions, 72 changer transitions 11/225 dead transitions. [2024-06-21 16:48:18,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 225 transitions, 2211 flow [2024-06-21 16:48:18,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-06-21 16:48:18,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897849462365591 [2024-06-21 16:48:18,758 INFO L175 Difference]: Start difference. First operand has 283 places, 210 transitions, 1707 flow. Second operand 12 states and 145 transitions. [2024-06-21 16:48:18,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 225 transitions, 2211 flow [2024-06-21 16:48:19,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 225 transitions, 2051 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 16:48:19,024 INFO L231 Difference]: Finished difference. Result has 281 places, 206 transitions, 1673 flow [2024-06-21 16:48:19,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1549, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1673, PETRI_PLACES=281, PETRI_TRANSITIONS=206} [2024-06-21 16:48:19,025 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 251 predicate places. [2024-06-21 16:48:19,025 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 206 transitions, 1673 flow [2024-06-21 16:48:19,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:19,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:19,025 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 16:48:19,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 16:48:19,025 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 16:48:19,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:19,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2072522860, now seen corresponding path program 23 times [2024-06-21 16:48:19,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:19,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293277730] [2024-06-21 16:48:19,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:19,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:20,075 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 16:48:20,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:20,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293277730] [2024-06-21 16:48:20,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293277730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:20,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:20,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:20,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25629546] [2024-06-21 16:48:20,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:20,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:20,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:20,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:20,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:20,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:20,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 206 transitions, 1673 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:20,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:20,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:20,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:20,613 INFO L124 PetriNetUnfolderBase]: 592/1223 cut-off events. [2024-06-21 16:48:20,614 INFO L125 PetriNetUnfolderBase]: For 135625/135625 co-relation queries the response was YES. [2024-06-21 16:48:20,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6831 conditions, 1223 events. 592/1223 cut-off events. For 135625/135625 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 7511 event pairs, 189 based on Foata normal form. 6/1228 useless extension candidates. Maximal degree in co-relation 6703. Up to 1065 conditions per place. [2024-06-21 16:48:20,624 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 200 selfloop transitions, 16 changer transitions 6/225 dead transitions. [2024-06-21 16:48:20,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 225 transitions, 2411 flow [2024-06-21 16:48:20,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:20,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:20,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 16:48:20,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-21 16:48:20,625 INFO L175 Difference]: Start difference. First operand has 281 places, 206 transitions, 1673 flow. Second operand 12 states and 139 transitions. [2024-06-21 16:48:20,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 225 transitions, 2411 flow [2024-06-21 16:48:21,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 225 transitions, 2245 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-21 16:48:21,028 INFO L231 Difference]: Finished difference. Result has 276 places, 204 transitions, 1538 flow [2024-06-21 16:48:21,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1538, PETRI_PLACES=276, PETRI_TRANSITIONS=204} [2024-06-21 16:48:21,028 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 246 predicate places. [2024-06-21 16:48:21,028 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 204 transitions, 1538 flow [2024-06-21 16:48:21,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:21,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:21,028 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 16:48:21,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 16:48:21,029 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 16:48:21,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:21,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1748971032, now seen corresponding path program 24 times [2024-06-21 16:48:21,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:21,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577481512] [2024-06-21 16:48:21,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:21,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:22,054 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 16:48:22,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:22,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577481512] [2024-06-21 16:48:22,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577481512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:22,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:22,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:22,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985434414] [2024-06-21 16:48:22,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:22,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:22,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:22,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:22,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:22,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:22,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 204 transitions, 1538 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:22,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:22,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:22,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:22,572 INFO L124 PetriNetUnfolderBase]: 601/1242 cut-off events. [2024-06-21 16:48:22,572 INFO L125 PetriNetUnfolderBase]: For 155313/155313 co-relation queries the response was YES. [2024-06-21 16:48:22,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7233 conditions, 1242 events. 601/1242 cut-off events. For 155313/155313 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 7617 event pairs, 196 based on Foata normal form. 6/1247 useless extension candidates. Maximal degree in co-relation 7107. Up to 1011 conditions per place. [2024-06-21 16:48:22,587 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 193 selfloop transitions, 19 changer transitions 9/224 dead transitions. [2024-06-21 16:48:22,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 224 transitions, 2242 flow [2024-06-21 16:48:22,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:48:22,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:48:22,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 150 transitions. [2024-06-21 16:48:22,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37220843672456577 [2024-06-21 16:48:22,589 INFO L175 Difference]: Start difference. First operand has 276 places, 204 transitions, 1538 flow. Second operand 13 states and 150 transitions. [2024-06-21 16:48:22,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 224 transitions, 2242 flow [2024-06-21 16:48:23,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 224 transitions, 2206 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 16:48:23,112 INFO L231 Difference]: Finished difference. Result has 276 places, 201 transitions, 1529 flow [2024-06-21 16:48:23,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1529, PETRI_PLACES=276, PETRI_TRANSITIONS=201} [2024-06-21 16:48:23,112 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 246 predicate places. [2024-06-21 16:48:23,113 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 201 transitions, 1529 flow [2024-06-21 16:48:23,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:23,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:23,113 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 16:48:23,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 16:48:23,113 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 16:48:23,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:23,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2129173658, now seen corresponding path program 25 times [2024-06-21 16:48:23,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:23,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703776903] [2024-06-21 16:48:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:23,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:24,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:24,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703776903] [2024-06-21 16:48:24,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703776903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:24,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:24,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:24,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375320312] [2024-06-21 16:48:24,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:24,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:24,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:24,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:24,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:24,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:24,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 201 transitions, 1529 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:24,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:24,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:24,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:24,786 INFO L124 PetriNetUnfolderBase]: 573/1186 cut-off events. [2024-06-21 16:48:24,787 INFO L125 PetriNetUnfolderBase]: For 130093/130093 co-relation queries the response was YES. [2024-06-21 16:48:24,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6280 conditions, 1186 events. 573/1186 cut-off events. For 130093/130093 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 7201 event pairs, 190 based on Foata normal form. 8/1193 useless extension candidates. Maximal degree in co-relation 6155. Up to 1080 conditions per place. [2024-06-21 16:48:24,794 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 188 selfloop transitions, 12 changer transitions 13/216 dead transitions. [2024-06-21 16:48:24,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 216 transitions, 2019 flow [2024-06-21 16:48:24,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:24,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:24,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-21 16:48:24,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-21 16:48:24,795 INFO L175 Difference]: Start difference. First operand has 276 places, 201 transitions, 1529 flow. Second operand 12 states and 134 transitions. [2024-06-21 16:48:24,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 216 transitions, 2019 flow [2024-06-21 16:48:25,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 216 transitions, 1980 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 16:48:25,258 INFO L231 Difference]: Finished difference. Result has 272 places, 196 transitions, 1482 flow [2024-06-21 16:48:25,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1490, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1482, PETRI_PLACES=272, PETRI_TRANSITIONS=196} [2024-06-21 16:48:25,259 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 242 predicate places. [2024-06-21 16:48:25,259 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 196 transitions, 1482 flow [2024-06-21 16:48:25,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:25,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:25,259 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 16:48:25,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 16:48:25,259 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 16:48:25,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:25,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1760012922, now seen corresponding path program 26 times [2024-06-21 16:48:25,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:25,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708106366] [2024-06-21 16:48:25,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:25,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:26,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:26,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708106366] [2024-06-21 16:48:26,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708106366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:26,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:26,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:26,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550259031] [2024-06-21 16:48:26,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:26,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:26,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:26,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:26,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:26,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:26,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 196 transitions, 1482 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:26,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:26,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:26,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:26,782 INFO L124 PetriNetUnfolderBase]: 562/1163 cut-off events. [2024-06-21 16:48:26,782 INFO L125 PetriNetUnfolderBase]: For 116096/116096 co-relation queries the response was YES. [2024-06-21 16:48:26,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6138 conditions, 1163 events. 562/1163 cut-off events. For 116096/116096 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6996 event pairs, 184 based on Foata normal form. 6/1168 useless extension candidates. Maximal degree in co-relation 6015. Up to 1011 conditions per place. [2024-06-21 16:48:26,791 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 190 selfloop transitions, 15 changer transitions 6/214 dead transitions. [2024-06-21 16:48:26,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 214 transitions, 2158 flow [2024-06-21 16:48:26,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:26,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:26,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-21 16:48:26,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682795698924731 [2024-06-21 16:48:26,792 INFO L175 Difference]: Start difference. First operand has 272 places, 196 transitions, 1482 flow. Second operand 12 states and 137 transitions. [2024-06-21 16:48:26,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 214 transitions, 2158 flow [2024-06-21 16:48:27,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 214 transitions, 2122 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 16:48:27,062 INFO L231 Difference]: Finished difference. Result has 266 places, 194 transitions, 1473 flow [2024-06-21 16:48:27,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1473, PETRI_PLACES=266, PETRI_TRANSITIONS=194} [2024-06-21 16:48:27,062 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 236 predicate places. [2024-06-21 16:48:27,063 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 194 transitions, 1473 flow [2024-06-21 16:48:27,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:27,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:27,063 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 16:48:27,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 16:48:27,063 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 16:48:27,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:27,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1760022222, now seen corresponding path program 27 times [2024-06-21 16:48:27,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:27,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107734616] [2024-06-21 16:48:27,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:27,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:28,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:28,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107734616] [2024-06-21 16:48:28,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107734616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:28,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:28,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:28,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131859982] [2024-06-21 16:48:28,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:28,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:28,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:28,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:28,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:28,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:28,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 194 transitions, 1473 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:28,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:28,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:28,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:28,576 INFO L124 PetriNetUnfolderBase]: 538/1111 cut-off events. [2024-06-21 16:48:28,576 INFO L125 PetriNetUnfolderBase]: For 88091/88091 co-relation queries the response was YES. [2024-06-21 16:48:28,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5186 conditions, 1111 events. 538/1111 cut-off events. For 88091/88091 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 6676 event pairs, 176 based on Foata normal form. 8/1118 useless extension candidates. Maximal degree in co-relation 5065. Up to 1011 conditions per place. [2024-06-21 16:48:28,585 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 180 selfloop transitions, 10 changer transitions 15/208 dead transitions. [2024-06-21 16:48:28,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 208 transitions, 1921 flow [2024-06-21 16:48:28,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:28,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:28,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-21 16:48:28,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 16:48:28,586 INFO L175 Difference]: Start difference. First operand has 266 places, 194 transitions, 1473 flow. Second operand 12 states and 132 transitions. [2024-06-21 16:48:28,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 208 transitions, 1921 flow [2024-06-21 16:48:28,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 208 transitions, 1887 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 16:48:28,770 INFO L231 Difference]: Finished difference. Result has 265 places, 187 transitions, 1402 flow [2024-06-21 16:48:28,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1402, PETRI_PLACES=265, PETRI_TRANSITIONS=187} [2024-06-21 16:48:28,771 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 235 predicate places. [2024-06-21 16:48:28,771 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 187 transitions, 1402 flow [2024-06-21 16:48:28,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:28,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:28,771 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 16:48:28,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 16:48:28,772 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 16:48:28,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:28,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1934257034, now seen corresponding path program 35 times [2024-06-21 16:48:28,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:28,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329604777] [2024-06-21 16:48:28,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:28,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:29,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:29,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329604777] [2024-06-21 16:48:29,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329604777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:29,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:29,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:48:29,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345011978] [2024-06-21 16:48:29,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:29,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:48:29,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:29,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:48:29,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:48:29,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:29,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 187 transitions, 1402 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:29,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:29,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:29,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:30,073 INFO L124 PetriNetUnfolderBase]: 522/1073 cut-off events. [2024-06-21 16:48:30,074 INFO L125 PetriNetUnfolderBase]: For 55635/55635 co-relation queries the response was YES. [2024-06-21 16:48:30,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4823 conditions, 1073 events. 522/1073 cut-off events. For 55635/55635 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6378 event pairs, 112 based on Foata normal form. 2/1074 useless extension candidates. Maximal degree in co-relation 4703. Up to 811 conditions per place. [2024-06-21 16:48:30,083 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 177 selfloop transitions, 45 changer transitions 0/225 dead transitions. [2024-06-21 16:48:30,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 225 transitions, 1996 flow [2024-06-21 16:48:30,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:30,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:30,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-21 16:48:30,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 16:48:30,084 INFO L175 Difference]: Start difference. First operand has 265 places, 187 transitions, 1402 flow. Second operand 12 states and 148 transitions. [2024-06-21 16:48:30,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 225 transitions, 1996 flow [2024-06-21 16:48:30,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 225 transitions, 1915 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 16:48:30,265 INFO L231 Difference]: Finished difference. Result has 256 places, 190 transitions, 1461 flow [2024-06-21 16:48:30,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1321, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1461, PETRI_PLACES=256, PETRI_TRANSITIONS=190} [2024-06-21 16:48:30,265 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 226 predicate places. [2024-06-21 16:48:30,265 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 190 transitions, 1461 flow [2024-06-21 16:48:30,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:30,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:30,265 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 16:48:30,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 16:48:30,266 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 16:48:30,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:30,266 INFO L85 PathProgramCache]: Analyzing trace with hash -605149013, now seen corresponding path program 1 times [2024-06-21 16:48:30,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:30,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650469367] [2024-06-21 16:48:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:30,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:31,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:31,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650469367] [2024-06-21 16:48:31,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650469367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:31,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:31,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:31,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994865048] [2024-06-21 16:48:31,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:31,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:31,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:31,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:31,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:31,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 190 transitions, 1461 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:31,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:31,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:31,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:31,615 INFO L124 PetriNetUnfolderBase]: 530/1094 cut-off events. [2024-06-21 16:48:31,616 INFO L125 PetriNetUnfolderBase]: For 68071/68071 co-relation queries the response was YES. [2024-06-21 16:48:31,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4825 conditions, 1094 events. 530/1094 cut-off events. For 68071/68071 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6527 event pairs, 110 based on Foata normal form. 6/1099 useless extension candidates. Maximal degree in co-relation 4708. Up to 941 conditions per place. [2024-06-21 16:48:31,624 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 172 selfloop transitions, 13 changer transitions 25/213 dead transitions. [2024-06-21 16:48:31,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 213 transitions, 1935 flow [2024-06-21 16:48:31,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:31,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-21 16:48:31,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 16:48:31,625 INFO L175 Difference]: Start difference. First operand has 256 places, 190 transitions, 1461 flow. Second operand 12 states and 140 transitions. [2024-06-21 16:48:31,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 213 transitions, 1935 flow [2024-06-21 16:48:31,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 213 transitions, 1599 flow, removed 40 selfloop flow, removed 19 redundant places. [2024-06-21 16:48:31,767 INFO L231 Difference]: Finished difference. Result has 249 places, 181 transitions, 1107 flow [2024-06-21 16:48:31,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1127, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1107, PETRI_PLACES=249, PETRI_TRANSITIONS=181} [2024-06-21 16:48:31,768 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 219 predicate places. [2024-06-21 16:48:31,768 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 181 transitions, 1107 flow [2024-06-21 16:48:31,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:31,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:31,768 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 16:48:31,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 16:48:31,768 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 16:48:31,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:31,769 INFO L85 PathProgramCache]: Analyzing trace with hash 747487403, now seen corresponding path program 2 times [2024-06-21 16:48:31,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:31,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828035565] [2024-06-21 16:48:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:31,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:32,724 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 16:48:32,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:32,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828035565] [2024-06-21 16:48:32,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828035565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:32,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:32,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:32,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001389058] [2024-06-21 16:48:32,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:32,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:32,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:32,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:32,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:32,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:32,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 181 transitions, 1107 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:32,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:32,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:32,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:33,225 INFO L124 PetriNetUnfolderBase]: 496/1034 cut-off events. [2024-06-21 16:48:33,225 INFO L125 PetriNetUnfolderBase]: For 67378/67378 co-relation queries the response was YES. [2024-06-21 16:48:33,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3956 conditions, 1034 events. 496/1034 cut-off events. For 67378/67378 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6152 event pairs, 93 based on Foata normal form. 6/1039 useless extension candidates. Maximal degree in co-relation 3849. Up to 835 conditions per place. [2024-06-21 16:48:33,232 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 161 selfloop transitions, 20 changer transitions 17/201 dead transitions. [2024-06-21 16:48:33,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 201 transitions, 1547 flow [2024-06-21 16:48:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-21 16:48:33,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 16:48:33,233 INFO L175 Difference]: Start difference. First operand has 249 places, 181 transitions, 1107 flow. Second operand 12 states and 140 transitions. [2024-06-21 16:48:33,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 201 transitions, 1547 flow [2024-06-21 16:48:33,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 201 transitions, 1509 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 16:48:33,376 INFO L231 Difference]: Finished difference. Result has 239 places, 174 transitions, 1066 flow [2024-06-21 16:48:33,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1066, PETRI_PLACES=239, PETRI_TRANSITIONS=174} [2024-06-21 16:48:33,376 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 209 predicate places. [2024-06-21 16:48:33,376 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 174 transitions, 1066 flow [2024-06-21 16:48:33,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:33,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:33,376 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 16:48:33,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 16:48:33,377 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 16:48:33,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:33,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1817615585, now seen corresponding path program 3 times [2024-06-21 16:48:33,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:33,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029320416] [2024-06-21 16:48:33,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:33,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:34,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:34,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029320416] [2024-06-21 16:48:34,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029320416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:34,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:34,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:34,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137866054] [2024-06-21 16:48:34,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:34,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:34,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:34,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:34,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:34,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:34,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 174 transitions, 1066 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:34,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:34,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:34,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:34,985 INFO L124 PetriNetUnfolderBase]: 474/996 cut-off events. [2024-06-21 16:48:34,985 INFO L125 PetriNetUnfolderBase]: For 59941/59941 co-relation queries the response was YES. [2024-06-21 16:48:34,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3793 conditions, 996 events. 474/996 cut-off events. For 59941/59941 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 5886 event pairs, 96 based on Foata normal form. 6/1001 useless extension candidates. Maximal degree in co-relation 3691. Up to 831 conditions per place. [2024-06-21 16:48:34,992 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 158 selfloop transitions, 18 changer transitions 14/193 dead transitions. [2024-06-21 16:48:34,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 193 transitions, 1488 flow [2024-06-21 16:48:34,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:34,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:34,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-21 16:48:34,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682795698924731 [2024-06-21 16:48:34,993 INFO L175 Difference]: Start difference. First operand has 239 places, 174 transitions, 1066 flow. Second operand 12 states and 137 transitions. [2024-06-21 16:48:34,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 193 transitions, 1488 flow [2024-06-21 16:48:35,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 193 transitions, 1438 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 16:48:35,123 INFO L231 Difference]: Finished difference. Result has 231 places, 168 transitions, 1013 flow [2024-06-21 16:48:35,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1013, PETRI_PLACES=231, PETRI_TRANSITIONS=168} [2024-06-21 16:48:35,123 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 201 predicate places. [2024-06-21 16:48:35,123 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 168 transitions, 1013 flow [2024-06-21 16:48:35,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:35,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:35,123 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 16:48:35,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 16:48:35,123 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 16:48:35,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:35,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1028417707, now seen corresponding path program 4 times [2024-06-21 16:48:35,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:35,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812985032] [2024-06-21 16:48:35,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:35,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:36,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:36,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812985032] [2024-06-21 16:48:36,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812985032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:36,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:36,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:36,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100167672] [2024-06-21 16:48:36,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:36,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:36,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:36,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:36,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:36,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:36,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 168 transitions, 1013 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:36,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:36,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:36,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:36,563 INFO L124 PetriNetUnfolderBase]: 456/966 cut-off events. [2024-06-21 16:48:36,563 INFO L125 PetriNetUnfolderBase]: For 54106/54106 co-relation queries the response was YES. [2024-06-21 16:48:36,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3641 conditions, 966 events. 456/966 cut-off events. For 54106/54106 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5694 event pairs, 96 based on Foata normal form. 6/971 useless extension candidates. Maximal degree in co-relation 3543. Up to 827 conditions per place. [2024-06-21 16:48:36,573 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 147 selfloop transitions, 7 changer transitions 29/186 dead transitions. [2024-06-21 16:48:36,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 186 transitions, 1419 flow [2024-06-21 16:48:36,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:36,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:36,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-06-21 16:48:36,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575268817204301 [2024-06-21 16:48:36,574 INFO L175 Difference]: Start difference. First operand has 231 places, 168 transitions, 1013 flow. Second operand 12 states and 133 transitions. [2024-06-21 16:48:36,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 186 transitions, 1419 flow [2024-06-21 16:48:36,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 186 transitions, 1375 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 16:48:36,703 INFO L231 Difference]: Finished difference. Result has 225 places, 153 transitions, 888 flow [2024-06-21 16:48:36,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=888, PETRI_PLACES=225, PETRI_TRANSITIONS=153} [2024-06-21 16:48:36,703 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 195 predicate places. [2024-06-21 16:48:36,703 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 153 transitions, 888 flow [2024-06-21 16:48:36,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:36,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:36,704 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 16:48:36,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 16:48:36,704 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 16:48:36,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:36,704 INFO L85 PathProgramCache]: Analyzing trace with hash -240273855, now seen corresponding path program 5 times [2024-06-21 16:48:36,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:36,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479396491] [2024-06-21 16:48:36,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:36,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:37,803 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 16:48:37,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:37,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479396491] [2024-06-21 16:48:37,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479396491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:37,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:37,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:37,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275880379] [2024-06-21 16:48:37,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:37,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:37,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:37,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:37,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:37,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:37,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 153 transitions, 888 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:37,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:37,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:37,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:38,188 INFO L124 PetriNetUnfolderBase]: 429/895 cut-off events. [2024-06-21 16:48:38,188 INFO L125 PetriNetUnfolderBase]: For 50020/50028 co-relation queries the response was YES. [2024-06-21 16:48:38,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3356 conditions, 895 events. 429/895 cut-off events. For 50020/50028 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5182 event pairs, 86 based on Foata normal form. 14/908 useless extension candidates. Maximal degree in co-relation 3273. Up to 669 conditions per place. [2024-06-21 16:48:38,193 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 119 selfloop transitions, 34 changer transitions 14/170 dead transitions. [2024-06-21 16:48:38,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 170 transitions, 1258 flow [2024-06-21 16:48:38,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:38,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 16:48:38,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-21 16:48:38,194 INFO L175 Difference]: Start difference. First operand has 225 places, 153 transitions, 888 flow. Second operand 12 states and 139 transitions. [2024-06-21 16:48:38,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 170 transitions, 1258 flow [2024-06-21 16:48:38,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 170 transitions, 1217 flow, removed 6 selfloop flow, removed 14 redundant places. [2024-06-21 16:48:38,282 INFO L231 Difference]: Finished difference. Result has 207 places, 147 transitions, 885 flow [2024-06-21 16:48:38,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=885, PETRI_PLACES=207, PETRI_TRANSITIONS=147} [2024-06-21 16:48:38,282 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 177 predicate places. [2024-06-21 16:48:38,282 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 147 transitions, 885 flow [2024-06-21 16:48:38,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:38,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:38,283 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 16:48:38,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 16:48:38,283 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 16:48:38,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:38,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1854846993, now seen corresponding path program 6 times [2024-06-21 16:48:38,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:38,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835878009] [2024-06-21 16:48:38,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:38,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:39,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:39,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835878009] [2024-06-21 16:48:39,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835878009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:39,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:39,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:39,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608477167] [2024-06-21 16:48:39,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:39,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:39,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:39,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:39,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:39,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:39,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 147 transitions, 885 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:39,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:39,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:39,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:39,931 INFO L124 PetriNetUnfolderBase]: 401/843 cut-off events. [2024-06-21 16:48:39,931 INFO L125 PetriNetUnfolderBase]: For 43575/43579 co-relation queries the response was YES. [2024-06-21 16:48:39,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3193 conditions, 843 events. 401/843 cut-off events. For 43575/43579 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4815 event pairs, 84 based on Foata normal form. 10/852 useless extension candidates. Maximal degree in co-relation 3117. Up to 661 conditions per place. [2024-06-21 16:48:39,935 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 114 selfloop transitions, 29 changer transitions 17/163 dead transitions. [2024-06-21 16:48:39,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 163 transitions, 1239 flow [2024-06-21 16:48:39,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:39,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:39,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-21 16:48:39,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 16:48:39,936 INFO L175 Difference]: Start difference. First operand has 207 places, 147 transitions, 885 flow. Second operand 12 states and 135 transitions. [2024-06-21 16:48:39,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 163 transitions, 1239 flow [2024-06-21 16:48:39,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 163 transitions, 1163 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 16:48:39,996 INFO L231 Difference]: Finished difference. Result has 201 places, 140 transitions, 833 flow [2024-06-21 16:48:39,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=833, PETRI_PLACES=201, PETRI_TRANSITIONS=140} [2024-06-21 16:48:39,996 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2024-06-21 16:48:39,996 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 140 transitions, 833 flow [2024-06-21 16:48:39,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:39,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:39,996 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 16:48:39,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 16:48:39,997 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 16:48:39,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:39,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1970138163, now seen corresponding path program 7 times [2024-06-21 16:48:39,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:39,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985599565] [2024-06-21 16:48:39,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:39,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:41,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:41,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985599565] [2024-06-21 16:48:41,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985599565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:41,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:41,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:41,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687226513] [2024-06-21 16:48:41,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:41,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:41,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:41,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:41,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:41,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:41,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 140 transitions, 833 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:41,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:41,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:41,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:41,531 INFO L124 PetriNetUnfolderBase]: 377/795 cut-off events. [2024-06-21 16:48:41,531 INFO L125 PetriNetUnfolderBase]: For 39873/39873 co-relation queries the response was YES. [2024-06-21 16:48:41,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3006 conditions, 795 events. 377/795 cut-off events. For 39873/39873 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4461 event pairs, 63 based on Foata normal form. 6/800 useless extension candidates. Maximal degree in co-relation 2933. Up to 457 conditions per place. [2024-06-21 16:48:41,535 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 96 selfloop transitions, 37 changer transitions 22/158 dead transitions. [2024-06-21 16:48:41,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 158 transitions, 1181 flow [2024-06-21 16:48:41,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:41,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:41,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 16:48:41,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-21 16:48:41,536 INFO L175 Difference]: Start difference. First operand has 201 places, 140 transitions, 833 flow. Second operand 12 states and 139 transitions. [2024-06-21 16:48:41,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 158 transitions, 1181 flow [2024-06-21 16:48:41,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 158 transitions, 1117 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 16:48:41,599 INFO L231 Difference]: Finished difference. Result has 195 places, 128 transitions, 787 flow [2024-06-21 16:48:41,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=787, PETRI_PLACES=195, PETRI_TRANSITIONS=128} [2024-06-21 16:48:41,599 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 165 predicate places. [2024-06-21 16:48:41,599 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 128 transitions, 787 flow [2024-06-21 16:48:41,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:41,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:41,600 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 16:48:41,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 16:48:41,600 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 16:48:41,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:41,600 INFO L85 PathProgramCache]: Analyzing trace with hash 767301203, now seen corresponding path program 8 times [2024-06-21 16:48:41,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:41,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470371856] [2024-06-21 16:48:41,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:41,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:42,657 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 16:48:42,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:42,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470371856] [2024-06-21 16:48:42,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470371856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:42,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:42,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:42,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740371403] [2024-06-21 16:48:42,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:42,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:42,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:42,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:42,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:42,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:42,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 128 transitions, 787 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:42,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:42,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:42,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:43,104 INFO L124 PetriNetUnfolderBase]: 339/717 cut-off events. [2024-06-21 16:48:43,104 INFO L125 PetriNetUnfolderBase]: For 37587/37587 co-relation queries the response was YES. [2024-06-21 16:48:43,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2816 conditions, 717 events. 339/717 cut-off events. For 37587/37587 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3921 event pairs, 66 based on Foata normal form. 6/722 useless extension candidates. Maximal degree in co-relation 2745. Up to 545 conditions per place. [2024-06-21 16:48:43,108 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 103 selfloop transitions, 27 changer transitions 11/144 dead transitions. [2024-06-21 16:48:43,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 144 transitions, 1103 flow [2024-06-21 16:48:43,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:43,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:43,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-21 16:48:43,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 16:48:43,109 INFO L175 Difference]: Start difference. First operand has 195 places, 128 transitions, 787 flow. Second operand 12 states and 135 transitions. [2024-06-21 16:48:43,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 144 transitions, 1103 flow [2024-06-21 16:48:43,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 144 transitions, 1017 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-21 16:48:43,161 INFO L231 Difference]: Finished difference. Result has 182 places, 123 transitions, 729 flow [2024-06-21 16:48:43,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=729, PETRI_PLACES=182, PETRI_TRANSITIONS=123} [2024-06-21 16:48:43,162 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 152 predicate places. [2024-06-21 16:48:43,162 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 123 transitions, 729 flow [2024-06-21 16:48:43,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:43,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:43,162 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 16:48:43,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 16:48:43,162 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 16:48:43,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:43,163 INFO L85 PathProgramCache]: Analyzing trace with hash 388812319, now seen corresponding path program 9 times [2024-06-21 16:48:43,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:43,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724571417] [2024-06-21 16:48:43,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:43,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:44,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:44,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724571417] [2024-06-21 16:48:44,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724571417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:44,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:44,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:44,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116709763] [2024-06-21 16:48:44,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:44,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:44,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:44,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:44,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:44,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:44,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 123 transitions, 729 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:44,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:44,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:44,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:44,710 INFO L124 PetriNetUnfolderBase]: 319/681 cut-off events. [2024-06-21 16:48:44,710 INFO L125 PetriNetUnfolderBase]: For 31901/31901 co-relation queries the response was YES. [2024-06-21 16:48:44,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2615 conditions, 681 events. 319/681 cut-off events. For 31901/31901 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3664 event pairs, 68 based on Foata normal form. 6/686 useless extension candidates. Maximal degree in co-relation 2549. Up to 537 conditions per place. [2024-06-21 16:48:44,714 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 99 selfloop transitions, 22 changer transitions 14/138 dead transitions. [2024-06-21 16:48:44,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 138 transitions, 1031 flow [2024-06-21 16:48:44,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:44,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:44,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-21 16:48:44,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 16:48:44,715 INFO L175 Difference]: Start difference. First operand has 182 places, 123 transitions, 729 flow. Second operand 12 states and 132 transitions. [2024-06-21 16:48:44,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 138 transitions, 1031 flow [2024-06-21 16:48:44,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 138 transitions, 971 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 16:48:44,782 INFO L231 Difference]: Finished difference. Result has 178 places, 117 transitions, 683 flow [2024-06-21 16:48:44,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=683, PETRI_PLACES=178, PETRI_TRANSITIONS=117} [2024-06-21 16:48:44,782 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2024-06-21 16:48:44,782 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 117 transitions, 683 flow [2024-06-21 16:48:44,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:44,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:44,783 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 16:48:44,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 16:48:44,783 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 16:48:44,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:44,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1023037661, now seen corresponding path program 10 times [2024-06-21 16:48:44,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:44,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333454803] [2024-06-21 16:48:44,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:44,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:45,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:45,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333454803] [2024-06-21 16:48:45,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333454803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:45,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:45,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:45,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919979554] [2024-06-21 16:48:45,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:45,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:45,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:45,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:45,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:45,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:45,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 117 transitions, 683 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:45,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:45,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:45,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:46,207 INFO L124 PetriNetUnfolderBase]: 303/649 cut-off events. [2024-06-21 16:48:46,207 INFO L125 PetriNetUnfolderBase]: For 29828/29828 co-relation queries the response was YES. [2024-06-21 16:48:46,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2481 conditions, 649 events. 303/649 cut-off events. For 29828/29828 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3419 event pairs, 58 based on Foata normal form. 6/654 useless extension candidates. Maximal degree in co-relation 2417. Up to 433 conditions per place. [2024-06-21 16:48:46,210 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 91 selfloop transitions, 24 changer transitions 16/134 dead transitions. [2024-06-21 16:48:46,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 134 transitions, 981 flow [2024-06-21 16:48:46,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:46,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:46,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-21 16:48:46,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 16:48:46,211 INFO L175 Difference]: Start difference. First operand has 178 places, 117 transitions, 683 flow. Second operand 12 states and 135 transitions. [2024-06-21 16:48:46,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 134 transitions, 981 flow [2024-06-21 16:48:46,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 134 transitions, 933 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 16:48:46,257 INFO L231 Difference]: Finished difference. Result has 174 places, 109 transitions, 643 flow [2024-06-21 16:48:46,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=643, PETRI_PLACES=174, PETRI_TRANSITIONS=109} [2024-06-21 16:48:46,257 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 144 predicate places. [2024-06-21 16:48:46,257 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 109 transitions, 643 flow [2024-06-21 16:48:46,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:46,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:46,258 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 16:48:46,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 16:48:46,258 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 16:48:46,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:46,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1582437549, now seen corresponding path program 11 times [2024-06-21 16:48:46,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:46,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555020060] [2024-06-21 16:48:46,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:46,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:47,325 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 16:48:47,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:47,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555020060] [2024-06-21 16:48:47,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555020060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:47,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:47,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:47,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007787159] [2024-06-21 16:48:47,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:47,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:47,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:47,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:47,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:47,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:47,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 109 transitions, 643 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:47,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:47,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:47,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:47,770 INFO L124 PetriNetUnfolderBase]: 273/587 cut-off events. [2024-06-21 16:48:47,770 INFO L125 PetriNetUnfolderBase]: For 28731/28731 co-relation queries the response was YES. [2024-06-21 16:48:47,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2320 conditions, 587 events. 273/587 cut-off events. For 28731/28731 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3016 event pairs, 60 based on Foata normal form. 6/592 useless extension candidates. Maximal degree in co-relation 2257. Up to 465 conditions per place. [2024-06-21 16:48:47,773 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 93 selfloop transitions, 14 changer transitions 14/124 dead transitions. [2024-06-21 16:48:47,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 124 transitions, 917 flow [2024-06-21 16:48:47,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:47,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-06-21 16:48:47,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3521505376344086 [2024-06-21 16:48:47,774 INFO L175 Difference]: Start difference. First operand has 174 places, 109 transitions, 643 flow. Second operand 12 states and 131 transitions. [2024-06-21 16:48:47,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 124 transitions, 917 flow [2024-06-21 16:48:47,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 124 transitions, 861 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 16:48:47,816 INFO L231 Difference]: Finished difference. Result has 167 places, 102 transitions, 579 flow [2024-06-21 16:48:47,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=579, PETRI_PLACES=167, PETRI_TRANSITIONS=102} [2024-06-21 16:48:47,816 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 137 predicate places. [2024-06-21 16:48:47,816 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 102 transitions, 579 flow [2024-06-21 16:48:47,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:47,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:47,816 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 16:48:47,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 16:48:47,817 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 16:48:47,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:47,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1810338699, now seen corresponding path program 12 times [2024-06-21 16:48:47,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:47,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986262756] [2024-06-21 16:48:47,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:47,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:48,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:48,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986262756] [2024-06-21 16:48:48,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986262756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:48,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:48,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:48,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446671106] [2024-06-21 16:48:48,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:48,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:48,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:48,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:48,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:49,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:49,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 102 transitions, 579 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:49,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:49,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:49,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:49,359 INFO L124 PetriNetUnfolderBase]: 257/551 cut-off events. [2024-06-21 16:48:49,360 INFO L125 PetriNetUnfolderBase]: For 25695/25695 co-relation queries the response was YES. [2024-06-21 16:48:49,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2153 conditions, 551 events. 257/551 cut-off events. For 25695/25695 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2753 event pairs, 60 based on Foata normal form. 6/556 useless extension candidates. Maximal degree in co-relation 2093. Up to 445 conditions per place. [2024-06-21 16:48:49,362 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 89 selfloop transitions, 13 changer transitions 12/117 dead transitions. [2024-06-21 16:48:49,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 117 transitions, 839 flow [2024-06-21 16:48:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:49,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:49,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 129 transitions. [2024-06-21 16:48:49,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-06-21 16:48:49,363 INFO L175 Difference]: Start difference. First operand has 167 places, 102 transitions, 579 flow. Second operand 12 states and 129 transitions. [2024-06-21 16:48:49,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 117 transitions, 839 flow [2024-06-21 16:48:49,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 117 transitions, 807 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 16:48:49,400 INFO L231 Difference]: Finished difference. Result has 163 places, 97 transitions, 547 flow [2024-06-21 16:48:49,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=547, PETRI_PLACES=163, PETRI_TRANSITIONS=97} [2024-06-21 16:48:49,400 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-06-21 16:48:49,400 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 97 transitions, 547 flow [2024-06-21 16:48:49,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:49,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:49,401 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 16:48:49,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 16:48:49,401 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 16:48:49,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:49,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1810511679, now seen corresponding path program 13 times [2024-06-21 16:48:49,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:49,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151600480] [2024-06-21 16:48:49,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:49,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:50,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:50,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151600480] [2024-06-21 16:48:50,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151600480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:50,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:50,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:50,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626682745] [2024-06-21 16:48:50,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:50,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:50,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:50,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:50,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:50,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:50,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 97 transitions, 547 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:50,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:50,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:50,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:50,923 INFO L124 PetriNetUnfolderBase]: 243/525 cut-off events. [2024-06-21 16:48:50,923 INFO L125 PetriNetUnfolderBase]: For 24727/24727 co-relation queries the response was YES. [2024-06-21 16:48:50,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2060 conditions, 525 events. 243/525 cut-off events. For 24727/24727 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2570 event pairs, 56 based on Foata normal form. 6/530 useless extension candidates. Maximal degree in co-relation 2001. Up to 409 conditions per place. [2024-06-21 16:48:50,926 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 78 selfloop transitions, 3 changer transitions 29/113 dead transitions. [2024-06-21 16:48:50,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 113 transitions, 801 flow [2024-06-21 16:48:50,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:50,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:50,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 129 transitions. [2024-06-21 16:48:50,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-06-21 16:48:50,927 INFO L175 Difference]: Start difference. First operand has 163 places, 97 transitions, 547 flow. Second operand 12 states and 129 transitions. [2024-06-21 16:48:50,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 113 transitions, 801 flow [2024-06-21 16:48:50,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 113 transitions, 765 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 16:48:50,962 INFO L231 Difference]: Finished difference. Result has 158 places, 83 transitions, 437 flow [2024-06-21 16:48:50,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=437, PETRI_PLACES=158, PETRI_TRANSITIONS=83} [2024-06-21 16:48:50,962 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2024-06-21 16:48:50,962 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 83 transitions, 437 flow [2024-06-21 16:48:50,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:50,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:50,962 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 16:48:50,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 16:48:50,963 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 16:48:50,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:50,963 INFO L85 PathProgramCache]: Analyzing trace with hash 998199937, now seen corresponding path program 14 times [2024-06-21 16:48:50,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:50,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569140298] [2024-06-21 16:48:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:50,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:52,132 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 16:48:52,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:52,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569140298] [2024-06-21 16:48:52,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569140298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:52,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:52,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:52,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894456374] [2024-06-21 16:48:52,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:52,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:52,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:52,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:52,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:52,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:52,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 83 transitions, 437 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:52,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:52,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:52,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:52,690 INFO L124 PetriNetUnfolderBase]: 212/449 cut-off events. [2024-06-21 16:48:52,690 INFO L125 PetriNetUnfolderBase]: For 22753/22753 co-relation queries the response was YES. [2024-06-21 16:48:52,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 449 events. 212/449 cut-off events. For 22753/22753 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2122 event pairs, 56 based on Foata normal form. 6/455 useless extension candidates. Maximal degree in co-relation 1729. Up to 327 conditions per place. [2024-06-21 16:48:52,693 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 58 selfloop transitions, 25 changer transitions 10/96 dead transitions. [2024-06-21 16:48:52,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 96 transitions, 649 flow [2024-06-21 16:48:52,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:52,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:52,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-21 16:48:52,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 16:48:52,694 INFO L175 Difference]: Start difference. First operand has 158 places, 83 transitions, 437 flow. Second operand 12 states and 132 transitions. [2024-06-21 16:48:52,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 96 transitions, 649 flow [2024-06-21 16:48:52,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 96 transitions, 621 flow, removed 8 selfloop flow, removed 14 redundant places. [2024-06-21 16:48:52,717 INFO L231 Difference]: Finished difference. Result has 134 places, 80 transitions, 447 flow [2024-06-21 16:48:52,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=447, PETRI_PLACES=134, PETRI_TRANSITIONS=80} [2024-06-21 16:48:52,717 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 104 predicate places. [2024-06-21 16:48:52,717 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 80 transitions, 447 flow [2024-06-21 16:48:52,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:52,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:52,717 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 16:48:52,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 16:48:52,718 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 16:48:52,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:52,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2030443395, now seen corresponding path program 15 times [2024-06-21 16:48:52,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:52,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579961869] [2024-06-21 16:48:52,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:52,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:53,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:53,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579961869] [2024-06-21 16:48:53,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579961869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:53,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:53,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:53,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725889514] [2024-06-21 16:48:53,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:53,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:53,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:53,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:53,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:54,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:54,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 80 transitions, 447 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:54,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:54,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:54,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:54,318 INFO L124 PetriNetUnfolderBase]: 205/436 cut-off events. [2024-06-21 16:48:54,318 INFO L125 PetriNetUnfolderBase]: For 17712/17712 co-relation queries the response was YES. [2024-06-21 16:48:54,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1707 conditions, 436 events. 205/436 cut-off events. For 17712/17712 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2023 event pairs, 54 based on Foata normal form. 6/442 useless extension candidates. Maximal degree in co-relation 1658. Up to 309 conditions per place. [2024-06-21 16:48:54,320 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 55 selfloop transitions, 23 changer transitions 13/94 dead transitions. [2024-06-21 16:48:54,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 94 transitions, 657 flow [2024-06-21 16:48:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:54,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-21 16:48:54,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 16:48:54,321 INFO L175 Difference]: Start difference. First operand has 134 places, 80 transitions, 447 flow. Second operand 12 states and 132 transitions. [2024-06-21 16:48:54,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 94 transitions, 657 flow [2024-06-21 16:48:54,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 94 transitions, 603 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 16:48:54,338 INFO L231 Difference]: Finished difference. Result has 131 places, 76 transitions, 424 flow [2024-06-21 16:48:54,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=424, PETRI_PLACES=131, PETRI_TRANSITIONS=76} [2024-06-21 16:48:54,338 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2024-06-21 16:48:54,338 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 76 transitions, 424 flow [2024-06-21 16:48:54,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:54,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:54,339 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 16:48:54,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 16:48:54,339 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 16:48:54,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:54,339 INFO L85 PathProgramCache]: Analyzing trace with hash 794564809, now seen corresponding path program 16 times [2024-06-21 16:48:54,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:54,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077973285] [2024-06-21 16:48:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:54,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:55,476 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 16:48:55,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:55,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077973285] [2024-06-21 16:48:55,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077973285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:55,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:55,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:55,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161831016] [2024-06-21 16:48:55,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:55,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:55,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:55,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:55,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:55,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:55,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 76 transitions, 424 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:55,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:55,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:55,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:56,001 INFO L124 PetriNetUnfolderBase]: 194/415 cut-off events. [2024-06-21 16:48:56,001 INFO L125 PetriNetUnfolderBase]: For 16932/16936 co-relation queries the response was YES. [2024-06-21 16:48:56,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1634 conditions, 415 events. 194/415 cut-off events. For 16932/16936 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1900 event pairs, 52 based on Foata normal form. 10/425 useless extension candidates. Maximal degree in co-relation 1586. Up to 291 conditions per place. [2024-06-21 16:48:56,003 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 49 selfloop transitions, 25 changer transitions 13/90 dead transitions. [2024-06-21 16:48:56,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 90 transitions, 626 flow [2024-06-21 16:48:56,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:56,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:56,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-06-21 16:48:56,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34946236559139787 [2024-06-21 16:48:56,005 INFO L175 Difference]: Start difference. First operand has 131 places, 76 transitions, 424 flow. Second operand 12 states and 130 transitions. [2024-06-21 16:48:56,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 90 transitions, 626 flow [2024-06-21 16:48:56,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 90 transitions, 574 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 16:48:56,029 INFO L231 Difference]: Finished difference. Result has 126 places, 72 transitions, 407 flow [2024-06-21 16:48:56,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=407, PETRI_PLACES=126, PETRI_TRANSITIONS=72} [2024-06-21 16:48:56,029 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 96 predicate places. [2024-06-21 16:48:56,030 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 72 transitions, 407 flow [2024-06-21 16:48:56,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:56,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:56,030 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 16:48:56,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 16:48:56,030 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 16:48:56,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:56,031 INFO L85 PathProgramCache]: Analyzing trace with hash 156685679, now seen corresponding path program 17 times [2024-06-21 16:48:56,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:56,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323608515] [2024-06-21 16:48:56,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:56,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:57,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:57,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323608515] [2024-06-21 16:48:57,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323608515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:57,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:57,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:57,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012323119] [2024-06-21 16:48:57,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:57,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:57,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:57,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:57,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:57,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:57,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 72 transitions, 407 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:57,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:57,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:57,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:57,590 INFO L124 PetriNetUnfolderBase]: 183/394 cut-off events. [2024-06-21 16:48:57,591 INFO L125 PetriNetUnfolderBase]: For 15404/15408 co-relation queries the response was YES. [2024-06-21 16:48:57,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1556 conditions, 394 events. 183/394 cut-off events. For 15404/15408 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1752 event pairs, 48 based on Foata normal form. 10/404 useless extension candidates. Maximal degree in co-relation 1510. Up to 265 conditions per place. [2024-06-21 16:48:57,592 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 45 selfloop transitions, 23 changer transitions 16/87 dead transitions. [2024-06-21 16:48:57,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 87 transitions, 605 flow [2024-06-21 16:48:57,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:57,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-06-21 16:48:57,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34946236559139787 [2024-06-21 16:48:57,593 INFO L175 Difference]: Start difference. First operand has 126 places, 72 transitions, 407 flow. Second operand 12 states and 130 transitions. [2024-06-21 16:48:57,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 87 transitions, 605 flow [2024-06-21 16:48:57,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 87 transitions, 549 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 16:48:57,609 INFO L231 Difference]: Finished difference. Result has 121 places, 67 transitions, 378 flow [2024-06-21 16:48:57,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=378, PETRI_PLACES=121, PETRI_TRANSITIONS=67} [2024-06-21 16:48:57,610 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 91 predicate places. [2024-06-21 16:48:57,610 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 67 transitions, 378 flow [2024-06-21 16:48:57,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:57,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:57,610 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 16:48:57,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 16:48:57,610 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 16:48:57,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:57,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1413379165, now seen corresponding path program 18 times [2024-06-21 16:48:57,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:57,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168860414] [2024-06-21 16:48:57,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:57,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:58,788 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 16:48:58,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:58,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168860414] [2024-06-21 16:48:58,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168860414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:58,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:58,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:48:58,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129629873] [2024-06-21 16:48:58,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:58,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:48:58,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:58,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:48:58,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:48:58,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:48:58,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 67 transitions, 378 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:58,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:58,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:48:58,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:59,198 INFO L124 PetriNetUnfolderBase]: 153/332 cut-off events. [2024-06-21 16:48:59,198 INFO L125 PetriNetUnfolderBase]: For 9342/9342 co-relation queries the response was YES. [2024-06-21 16:48:59,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 332 events. 153/332 cut-off events. For 9342/9342 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1413 event pairs, 35 based on Foata normal form. 6/338 useless extension candidates. Maximal degree in co-relation 1106. Up to 222 conditions per place. [2024-06-21 16:48:59,200 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 48 selfloop transitions, 19 changer transitions 10/80 dead transitions. [2024-06-21 16:48:59,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 80 transitions, 558 flow [2024-06-21 16:48:59,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:48:59,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:48:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-06-21 16:48:59,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34946236559139787 [2024-06-21 16:48:59,201 INFO L175 Difference]: Start difference. First operand has 121 places, 67 transitions, 378 flow. Second operand 12 states and 130 transitions. [2024-06-21 16:48:59,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 80 transitions, 558 flow [2024-06-21 16:48:59,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 80 transitions, 504 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 16:48:59,210 INFO L231 Difference]: Finished difference. Result has 114 places, 64 transitions, 350 flow [2024-06-21 16:48:59,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=350, PETRI_PLACES=114, PETRI_TRANSITIONS=64} [2024-06-21 16:48:59,210 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 84 predicate places. [2024-06-21 16:48:59,210 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 64 transitions, 350 flow [2024-06-21 16:48:59,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:59,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:59,210 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 16:48:59,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 16:48:59,210 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 16:48:59,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:59,211 INFO L85 PathProgramCache]: Analyzing trace with hash 993558307, now seen corresponding path program 19 times [2024-06-21 16:48:59,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:59,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097196734] [2024-06-21 16:48:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:59,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:00,371 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 16:49:00,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:00,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097196734] [2024-06-21 16:49:00,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097196734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:00,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:00,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:49:00,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898621128] [2024-06-21 16:49:00,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:00,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:49:00,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:00,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:49:00,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:49:00,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:49:00,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 64 transitions, 350 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:00,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:00,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:49:00,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:00,818 INFO L124 PetriNetUnfolderBase]: 146/319 cut-off events. [2024-06-21 16:49:00,819 INFO L125 PetriNetUnfolderBase]: For 8016/8016 co-relation queries the response was YES. [2024-06-21 16:49:00,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 319 events. 146/319 cut-off events. For 8016/8016 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1339 event pairs, 29 based on Foata normal form. 6/325 useless extension candidates. Maximal degree in co-relation 1042. Up to 182 conditions per place. [2024-06-21 16:49:00,820 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 45 selfloop transitions, 18 changer transitions 13/79 dead transitions. [2024-06-21 16:49:00,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 79 transitions, 532 flow [2024-06-21 16:49:00,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:49:00,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:49:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-21 16:49:00,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 16:49:00,821 INFO L175 Difference]: Start difference. First operand has 114 places, 64 transitions, 350 flow. Second operand 12 states and 132 transitions. [2024-06-21 16:49:00,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 79 transitions, 532 flow [2024-06-21 16:49:00,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 79 transitions, 488 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 16:49:00,829 INFO L231 Difference]: Finished difference. Result has 109 places, 59 transitions, 324 flow [2024-06-21 16:49:00,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=324, PETRI_PLACES=109, PETRI_TRANSITIONS=59} [2024-06-21 16:49:00,829 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 79 predicate places. [2024-06-21 16:49:00,829 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 59 transitions, 324 flow [2024-06-21 16:49:00,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:00,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:00,829 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 16:49:00,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 16:49:00,829 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 16:49:00,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:00,830 INFO L85 PathProgramCache]: Analyzing trace with hash -780736311, now seen corresponding path program 20 times [2024-06-21 16:49:00,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:00,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988795531] [2024-06-21 16:49:00,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:00,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:02,001 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 16:49:02,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:02,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988795531] [2024-06-21 16:49:02,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988795531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:02,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:02,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:49:02,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564790697] [2024-06-21 16:49:02,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:02,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:49:02,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:02,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:49:02,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:49:02,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:49:02,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 59 transitions, 324 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:02,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:02,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:49:02,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:02,387 INFO L124 PetriNetUnfolderBase]: 131/288 cut-off events. [2024-06-21 16:49:02,387 INFO L125 PetriNetUnfolderBase]: For 7122/7122 co-relation queries the response was YES. [2024-06-21 16:49:02,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 991 conditions, 288 events. 131/288 cut-off events. For 7122/7122 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1150 event pairs, 29 based on Foata normal form. 6/294 useless extension candidates. Maximal degree in co-relation 952. Up to 178 conditions per place. [2024-06-21 16:49:02,388 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 39 selfloop transitions, 14 changer transitions 17/73 dead transitions. [2024-06-21 16:49:02,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 73 transitions, 492 flow [2024-06-21 16:49:02,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:49:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:49:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-06-21 16:49:02,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 16:49:02,389 INFO L175 Difference]: Start difference. First operand has 109 places, 59 transitions, 324 flow. Second operand 12 states and 128 transitions. [2024-06-21 16:49:02,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 73 transitions, 492 flow [2024-06-21 16:49:02,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 73 transitions, 448 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 16:49:02,396 INFO L231 Difference]: Finished difference. Result has 102 places, 53 transitions, 286 flow [2024-06-21 16:49:02,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=286, PETRI_PLACES=102, PETRI_TRANSITIONS=53} [2024-06-21 16:49:02,396 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 72 predicate places. [2024-06-21 16:49:02,396 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 53 transitions, 286 flow [2024-06-21 16:49:02,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:02,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:02,396 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 16:49:02,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 16:49:02,397 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 16:49:02,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:02,397 INFO L85 PathProgramCache]: Analyzing trace with hash 679273639, now seen corresponding path program 21 times [2024-06-21 16:49:02,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:02,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170968019] [2024-06-21 16:49:02,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:02,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:03,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:03,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170968019] [2024-06-21 16:49:03,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170968019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:03,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:03,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:49:03,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767932569] [2024-06-21 16:49:03,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:03,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:49:03,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:03,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:49:03,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:49:03,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:49:03,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 53 transitions, 286 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:03,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:03,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:49:03,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:03,856 INFO L124 PetriNetUnfolderBase]: 118/259 cut-off events. [2024-06-21 16:49:03,856 INFO L125 PetriNetUnfolderBase]: For 5930/5930 co-relation queries the response was YES. [2024-06-21 16:49:03,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 886 conditions, 259 events. 118/259 cut-off events. For 5930/5930 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 988 event pairs, 14 based on Foata normal form. 6/265 useless extension candidates. Maximal degree in co-relation 850. Up to 88 conditions per place. [2024-06-21 16:49:03,857 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 27 selfloop transitions, 22 changer transitions 17/69 dead transitions. [2024-06-21 16:49:03,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 69 transitions, 450 flow [2024-06-21 16:49:03,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:49:03,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:49:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-06-21 16:49:03,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 16:49:03,857 INFO L175 Difference]: Start difference. First operand has 102 places, 53 transitions, 286 flow. Second operand 12 states and 128 transitions. [2024-06-21 16:49:03,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 69 transitions, 450 flow [2024-06-21 16:49:03,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 69 transitions, 412 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 16:49:03,862 INFO L231 Difference]: Finished difference. Result has 93 places, 46 transitions, 265 flow [2024-06-21 16:49:03,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=265, PETRI_PLACES=93, PETRI_TRANSITIONS=46} [2024-06-21 16:49:03,862 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 63 predicate places. [2024-06-21 16:49:03,862 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 46 transitions, 265 flow [2024-06-21 16:49:03,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:03,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:03,863 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 16:49:03,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 16:49:03,863 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 16:49:03,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:03,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1570885669, now seen corresponding path program 22 times [2024-06-21 16:49:03,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:03,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245411782] [2024-06-21 16:49:03,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:03,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:04,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:04,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245411782] [2024-06-21 16:49:04,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245411782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:04,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:04,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:49:04,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518964896] [2024-06-21 16:49:04,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:04,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:49:04,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:04,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:49:04,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:49:05,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:49:05,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 46 transitions, 265 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:05,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:05,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:49:05,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:05,423 INFO L124 PetriNetUnfolderBase]: 98/217 cut-off events. [2024-06-21 16:49:05,423 INFO L125 PetriNetUnfolderBase]: For 4522/4522 co-relation queries the response was YES. [2024-06-21 16:49:05,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 782 conditions, 217 events. 98/217 cut-off events. For 4522/4522 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 775 event pairs, 23 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 750. Up to 134 conditions per place. [2024-06-21 16:49:05,424 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 30 selfloop transitions, 16 changer transitions 10/59 dead transitions. [2024-06-21 16:49:05,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 59 transitions, 403 flow [2024-06-21 16:49:05,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:49:05,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:49:05,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-06-21 16:49:05,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33602150537634407 [2024-06-21 16:49:05,425 INFO L175 Difference]: Start difference. First operand has 93 places, 46 transitions, 265 flow. Second operand 12 states and 125 transitions. [2024-06-21 16:49:05,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 59 transitions, 403 flow [2024-06-21 16:49:05,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 59 transitions, 347 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-21 16:49:05,429 INFO L231 Difference]: Finished difference. Result has 82 places, 43 transitions, 230 flow [2024-06-21 16:49:05,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=230, PETRI_PLACES=82, PETRI_TRANSITIONS=43} [2024-06-21 16:49:05,429 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2024-06-21 16:49:05,429 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 43 transitions, 230 flow [2024-06-21 16:49:05,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:05,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:05,429 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 16:49:05,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 16:49:05,429 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 16:49:05,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:05,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1577314759, now seen corresponding path program 23 times [2024-06-21 16:49:05,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:05,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878533137] [2024-06-21 16:49:05,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:05,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:06,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:06,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878533137] [2024-06-21 16:49:06,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878533137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:06,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:06,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:49:06,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381814698] [2024-06-21 16:49:06,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:06,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:49:06,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:06,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:49:06,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:49:06,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:49:06,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 43 transitions, 230 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:06,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:06,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:49:06,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:07,104 INFO L124 PetriNetUnfolderBase]: 91/204 cut-off events. [2024-06-21 16:49:07,104 INFO L125 PetriNetUnfolderBase]: For 3032/3036 co-relation queries the response was YES. [2024-06-21 16:49:07,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 204 events. 91/204 cut-off events. For 3032/3036 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 700 event pairs, 21 based on Foata normal form. 10/214 useless extension candidates. Maximal degree in co-relation 658. Up to 116 conditions per place. [2024-06-21 16:49:07,105 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 27 selfloop transitions, 14 changer transitions 13/57 dead transitions. [2024-06-21 16:49:07,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 57 transitions, 366 flow [2024-06-21 16:49:07,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:49:07,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:49:07,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-06-21 16:49:07,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33602150537634407 [2024-06-21 16:49:07,106 INFO L175 Difference]: Start difference. First operand has 82 places, 43 transitions, 230 flow. Second operand 12 states and 125 transitions. [2024-06-21 16:49:07,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 57 transitions, 366 flow [2024-06-21 16:49:07,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 57 transitions, 330 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 16:49:07,109 INFO L231 Difference]: Finished difference. Result has 79 places, 39 transitions, 207 flow [2024-06-21 16:49:07,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=67, 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=12, PETRI_FLOW=207, PETRI_PLACES=79, PETRI_TRANSITIONS=39} [2024-06-21 16:49:07,109 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2024-06-21 16:49:07,109 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 39 transitions, 207 flow [2024-06-21 16:49:07,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:07,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:07,110 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 16:49:07,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 16:49:07,110 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 16:49:07,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:07,110 INFO L85 PathProgramCache]: Analyzing trace with hash -486547089, now seen corresponding path program 24 times [2024-06-21 16:49:07,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:07,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985342054] [2024-06-21 16:49:07,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:07,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:08,325 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 16:49:08,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:08,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985342054] [2024-06-21 16:49:08,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985342054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:08,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:08,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:49:08,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594496387] [2024-06-21 16:49:08,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:08,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:49:08,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:08,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:49:08,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:49:08,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:49:08,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 39 transitions, 207 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:08,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:08,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:49:08,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:08,746 INFO L124 PetriNetUnfolderBase]: 80/183 cut-off events. [2024-06-21 16:49:08,746 INFO L125 PetriNetUnfolderBase]: For 2758/2758 co-relation queries the response was YES. [2024-06-21 16:49:08,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 183 events. 80/183 cut-off events. For 2758/2758 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 593 event pairs, 21 based on Foata normal form. 6/189 useless extension candidates. Maximal degree in co-relation 592. Up to 106 conditions per place. [2024-06-21 16:49:08,747 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 27 selfloop transitions, 12 changer transitions 10/52 dead transitions. [2024-06-21 16:49:08,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 52 transitions, 331 flow [2024-06-21 16:49:08,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:49:08,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:49:08,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-06-21 16:49:08,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33602150537634407 [2024-06-21 16:49:08,748 INFO L175 Difference]: Start difference. First operand has 79 places, 39 transitions, 207 flow. Second operand 12 states and 125 transitions. [2024-06-21 16:49:08,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 52 transitions, 331 flow [2024-06-21 16:49:08,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 52 transitions, 297 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 16:49:08,750 INFO L231 Difference]: Finished difference. Result has 74 places, 36 transitions, 186 flow [2024-06-21 16:49:08,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=186, PETRI_PLACES=74, PETRI_TRANSITIONS=36} [2024-06-21 16:49:08,751 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2024-06-21 16:49:08,751 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 36 transitions, 186 flow [2024-06-21 16:49:08,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:08,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:08,751 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 16:49:08,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 16:49:08,751 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 16:49:08,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:08,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1748017189, now seen corresponding path program 25 times [2024-06-21 16:49:08,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:08,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060342131] [2024-06-21 16:49:08,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:08,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:09,912 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 16:49:09,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:09,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060342131] [2024-06-21 16:49:09,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060342131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:09,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:09,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:49:09,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880976901] [2024-06-21 16:49:09,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:09,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:49:09,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:09,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:49:09,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:49:10,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:49:10,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 36 transitions, 186 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:10,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:10,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:49:10,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:10,270 INFO L124 PetriNetUnfolderBase]: 73/170 cut-off events. [2024-06-21 16:49:10,270 INFO L125 PetriNetUnfolderBase]: For 2266/2266 co-relation queries the response was YES. [2024-06-21 16:49:10,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 170 events. 73/170 cut-off events. For 2266/2266 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 536 event pairs, 8 based on Foata normal form. 6/176 useless extension candidates. Maximal degree in co-relation 540. Up to 46 conditions per place. [2024-06-21 16:49:10,271 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 21 selfloop transitions, 14 changer transitions 13/51 dead transitions. [2024-06-21 16:49:10,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 51 transitions, 312 flow [2024-06-21 16:49:10,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:49:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:49:10,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 124 transitions. [2024-06-21 16:49:10,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-21 16:49:10,272 INFO L175 Difference]: Start difference. First operand has 74 places, 36 transitions, 186 flow. Second operand 12 states and 124 transitions. [2024-06-21 16:49:10,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 51 transitions, 312 flow [2024-06-21 16:49:10,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 51 transitions, 282 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 16:49:10,273 INFO L231 Difference]: Finished difference. Result has 70 places, 31 transitions, 166 flow [2024-06-21 16:49:10,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=166, PETRI_PLACES=70, PETRI_TRANSITIONS=31} [2024-06-21 16:49:10,274 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 40 predicate places. [2024-06-21 16:49:10,274 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 31 transitions, 166 flow [2024-06-21 16:49:10,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:10,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:10,274 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 16:49:10,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 16:49:10,275 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 16:49:10,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:10,275 INFO L85 PathProgramCache]: Analyzing trace with hash 791308403, now seen corresponding path program 26 times [2024-06-21 16:49:10,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:10,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150146096] [2024-06-21 16:49:10,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:10,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:11,335 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 16:49:11,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:11,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150146096] [2024-06-21 16:49:11,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150146096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:11,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:11,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:49:11,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522633025] [2024-06-21 16:49:11,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:11,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:49:11,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:11,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:49:11,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:49:11,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:49:11,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 31 transitions, 166 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:11,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:11,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:49:11,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:11,653 INFO L124 PetriNetUnfolderBase]: 58/139 cut-off events. [2024-06-21 16:49:11,653 INFO L125 PetriNetUnfolderBase]: For 1820/1820 co-relation queries the response was YES. [2024-06-21 16:49:11,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 139 events. 58/139 cut-off events. For 1820/1820 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 388 event pairs, 15 based on Foata normal form. 6/145 useless extension candidates. Maximal degree in co-relation 460. Up to 62 conditions per place. [2024-06-21 16:49:11,654 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 19 selfloop transitions, 7 changer transitions 16/45 dead transitions. [2024-06-21 16:49:11,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 45 transitions, 278 flow [2024-06-21 16:49:11,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:49:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:49:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 124 transitions. [2024-06-21 16:49:11,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-21 16:49:11,655 INFO L175 Difference]: Start difference. First operand has 70 places, 31 transitions, 166 flow. Second operand 12 states and 124 transitions. [2024-06-21 16:49:11,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 45 transitions, 278 flow [2024-06-21 16:49:11,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 45 transitions, 242 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 16:49:11,656 INFO L231 Difference]: Finished difference. Result has 63 places, 25 transitions, 121 flow [2024-06-21 16:49:11,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=121, PETRI_PLACES=63, PETRI_TRANSITIONS=25} [2024-06-21 16:49:11,656 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2024-06-21 16:49:11,656 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 25 transitions, 121 flow [2024-06-21 16:49:11,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:11,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:11,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:11,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 16:49:11,657 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 16:49:11,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:11,657 INFO L85 PathProgramCache]: Analyzing trace with hash -949743867, now seen corresponding path program 27 times [2024-06-21 16:49:11,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:11,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497178358] [2024-06-21 16:49:11,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:11,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:12,823 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 16:49:12,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:12,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497178358] [2024-06-21 16:49:12,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497178358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:12,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:12,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:49:12,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378484161] [2024-06-21 16:49:12,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:12,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:49:12,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:12,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:49:12,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:49:12,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:49:12,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 25 transitions, 121 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:12,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:12,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:49:12,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:13,207 INFO L124 PetriNetUnfolderBase]: 45/110 cut-off events. [2024-06-21 16:49:13,208 INFO L125 PetriNetUnfolderBase]: For 1242/1246 co-relation queries the response was YES. [2024-06-21 16:49:13,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 110 events. 45/110 cut-off events. For 1242/1246 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 266 event pairs, 15 based on Foata normal form. 10/120 useless extension candidates. Maximal degree in co-relation 348. Up to 52 conditions per place. [2024-06-21 16:49:13,208 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 17 selfloop transitions, 8 changer transitions 10/38 dead transitions. [2024-06-21 16:49:13,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 38 transitions, 217 flow [2024-06-21 16:49:13,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:49:13,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:49:13,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 120 transitions. [2024-06-21 16:49:13,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-06-21 16:49:13,209 INFO L175 Difference]: Start difference. First operand has 63 places, 25 transitions, 121 flow. Second operand 12 states and 120 transitions. [2024-06-21 16:49:13,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 38 transitions, 217 flow [2024-06-21 16:49:13,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 38 transitions, 193 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 16:49:13,210 INFO L231 Difference]: Finished difference. Result has 54 places, 22 transitions, 102 flow [2024-06-21 16:49:13,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=102, PETRI_PLACES=54, PETRI_TRANSITIONS=22} [2024-06-21 16:49:13,210 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 24 predicate places. [2024-06-21 16:49:13,210 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 22 transitions, 102 flow [2024-06-21 16:49:13,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:13,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:13,210 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 16:49:13,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 16:49:13,210 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 16:49:13,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:13,211 INFO L85 PathProgramCache]: Analyzing trace with hash 799713481, now seen corresponding path program 28 times [2024-06-21 16:49:13,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:13,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821337995] [2024-06-21 16:49:13,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:13,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:14,376 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 16:49:14,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:14,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821337995] [2024-06-21 16:49:14,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821337995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:14,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:14,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:49:14,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003999326] [2024-06-21 16:49:14,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:14,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:49:14,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:14,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:49:14,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:49:14,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 16:49:14,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 22 transitions, 102 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:14,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:14,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 16:49:14,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:14,720 INFO L124 PetriNetUnfolderBase]: 23/64 cut-off events. [2024-06-21 16:49:14,720 INFO L125 PetriNetUnfolderBase]: For 332/332 co-relation queries the response was YES. [2024-06-21 16:49:14,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 64 events. 23/64 cut-off events. For 332/332 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 94 event pairs, 0 based on Foata normal form. 6/70 useless extension candidates. Maximal degree in co-relation 164. Up to 24 conditions per place. [2024-06-21 16:49:14,721 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 0 selfloop transitions, 0 changer transitions 31/31 dead transitions. [2024-06-21 16:49:14,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 31 transitions, 156 flow [2024-06-21 16:49:14,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:49:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:49:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 113 transitions. [2024-06-21 16:49:14,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30376344086021506 [2024-06-21 16:49:14,721 INFO L175 Difference]: Start difference. First operand has 54 places, 22 transitions, 102 flow. Second operand 12 states and 113 transitions. [2024-06-21 16:49:14,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 31 transitions, 156 flow [2024-06-21 16:49:14,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 31 transitions, 124 flow, removed 0 selfloop flow, removed 16 redundant places. [2024-06-21 16:49:14,722 INFO L231 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2024-06-21 16:49:14,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=0, PETRI_PLACES=43, PETRI_TRANSITIONS=0} [2024-06-21 16:49:14,722 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2024-06-21 16:49:14,722 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2024-06-21 16:49:14,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:14,725 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 16:49:14,725 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 16:49:14,725 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 16:49:14,725 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 16:49:14,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 16:49:14,726 INFO L445 BasicCegarLoop]: Path program histogram: [35, 28, 27, 20, 11, 10, 7, 6, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:14,729 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 16:49:14,729 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 16:49:14,732 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 16:49:14,732 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 16:49:14,733 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 04:49:14 BasicIcfg [2024-06-21 16:49:14,733 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 16:49:14,734 INFO L158 Benchmark]: Toolchain (without parser) took 267055.79ms. Allocated memory was 138.4MB in the beginning and 1.1GB in the end (delta: 924.8MB). Free memory was 103.7MB in the beginning and 475.3MB in the end (delta: -371.6MB). Peak memory consumption was 554.2MB. Max. memory is 16.1GB. [2024-06-21 16:49:14,734 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 138.4MB. Free memory is still 114.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 16:49:14,734 INFO L158 Benchmark]: Witness Parser took 0.20ms. Allocated memory is still 138.4MB. Free memory is still 109.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 16:49:14,734 INFO L158 Benchmark]: CACSL2BoogieTranslator took 581.56ms. Allocated memory is still 138.4MB. Free memory was 103.7MB in the beginning and 71.1MB in the end (delta: 32.6MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2024-06-21 16:49:14,735 INFO L158 Benchmark]: Boogie Procedure Inliner took 76.08ms. Allocated memory is still 138.4MB. Free memory was 70.6MB in the beginning and 68.0MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 16:49:14,735 INFO L158 Benchmark]: Boogie Preprocessor took 88.24ms. Allocated memory is still 138.4MB. Free memory was 68.0MB in the beginning and 65.0MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 16:49:14,735 INFO L158 Benchmark]: RCFGBuilder took 678.34ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 65.0MB in the beginning and 103.2MB in the end (delta: -38.2MB). Peak memory consumption was 24.7MB. Max. memory is 16.1GB. [2024-06-21 16:49:14,735 INFO L158 Benchmark]: TraceAbstraction took 265624.75ms. Allocated memory was 167.8MB in the beginning and 1.1GB in the end (delta: 895.5MB). Free memory was 103.0MB in the beginning and 475.3MB in the end (delta: -372.3MB). Peak memory consumption was 523.2MB. Max. memory is 16.1GB. [2024-06-21 16:49:14,737 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 138.4MB. Free memory is still 114.1MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.20ms. Allocated memory is still 138.4MB. Free memory is still 109.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 581.56ms. Allocated memory is still 138.4MB. Free memory was 103.7MB in the beginning and 71.1MB in the end (delta: 32.6MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 76.08ms. Allocated memory is still 138.4MB. Free memory was 70.6MB in the beginning and 68.0MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 88.24ms. Allocated memory is still 138.4MB. Free memory was 68.0MB in the beginning and 65.0MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 678.34ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 65.0MB in the beginning and 103.2MB in the end (delta: -38.2MB). Peak memory consumption was 24.7MB. Max. memory is 16.1GB. * TraceAbstraction took 265624.75ms. Allocated memory was 167.8MB in the beginning and 1.1GB in the end (delta: 895.5MB). Free memory was 103.0MB in the beginning and 475.3MB in the end (delta: -372.3MB). Peak memory consumption was 523.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 816]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 817]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 50 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 265.5s, OverallIterations: 175, TraceHistogramMax: 1, PathProgramHistogramMax: 35, EmptinessCheckTime: 0.0s, AutomataDifference: 100.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12579 SdHoareTripleChecker+Valid, 43.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10628 mSDsluCounter, 10168 SdHoareTripleChecker+Invalid, 37.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9322 mSDsCounter, 2245 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 72321 IncrementalHoareTripleChecker+Invalid, 74566 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2245 mSolverCounterUnsat, 846 mSDtfsCounter, 72321 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2113 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5274 ImplicationChecksByTransitivity, 70.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2327occurred in iteration=121, InterpolantAutomatonStates: 1837, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 163.1s InterpolantComputationTime, 2960 NumberOfCodeBlocks, 2960 NumberOfCodeBlocksAsserted, 175 NumberOfCheckSat, 2785 ConstructedInterpolants, 0 QuantifiedInterpolants, 135611 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 175 InterpolantComputations, 175 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 16:49:14,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE