./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi003_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/rfi003_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/rfi003_tso.i ./goblint.2024-06-19_11-23-25.files/protection/rfi003_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:49:10,515 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:49:10,587 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:49:10,598 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:49:10,598 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:49:10,623 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:49:10,624 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:49:10,624 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:49:10,625 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:49:10,628 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:49:10,628 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:49:10,628 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:49:10,629 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:49:10,630 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:49:10,630 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:49:10,630 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:49:10,631 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:49:10,631 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:49:10,631 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:49:10,631 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:49:10,631 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:49:10,632 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:49:10,632 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:49:10,632 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:49:10,632 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:49:10,633 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:49:10,633 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:49:10,633 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:49:10,634 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:49:10,634 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:49:10,635 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:49:10,635 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:49:10,635 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:49:10,635 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:49:10,635 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:49:10,636 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:49:10,636 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:49:10,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:49:10,636 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:49:10,636 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:49:10,636 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:49:10,637 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:49:10,637 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:49:10,637 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:49:10,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:49:10,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:49:10,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:49:10,889 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:49:10,889 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:49:10,890 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/rfi003_tso.yml/witness.yml [2024-06-27 17:49:11,014 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:49:11,014 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:49:11,015 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi003_tso.i [2024-06-27 17:49:12,056 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:49:12,266 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:49:12,267 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi003_tso.i [2024-06-27 17:49:12,278 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50981094d/28b229e6144646e9ab6b9d4f6122e989/FLAG282fc1932 [2024-06-27 17:49:12,288 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50981094d/28b229e6144646e9ab6b9d4f6122e989 [2024-06-27 17:49:12,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:49:12,291 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:49:12,293 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:49:12,294 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:49:12,297 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:49:12,298 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:49:11" (1/2) ... [2024-06-27 17:49:12,299 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f1c5769 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:12, skipping insertion in model container [2024-06-27 17:49:12,299 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:49:11" (1/2) ... [2024-06-27 17:49:12,300 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@9f9171e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:12, skipping insertion in model container [2024-06-27 17:49:12,301 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:49:12" (2/2) ... [2024-06-27 17:49:12,301 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f1c5769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:12, skipping insertion in model container [2024-06-27 17:49:12,301 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:49:12" (2/2) ... [2024-06-27 17:49:12,302 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:49:12,358 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:49:12,359 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] (((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) [2024-06-27 17:49:12,359 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) [2024-06-27 17:49:12,359 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:49:12,360 INFO L106 edCorrectnessWitness]: ghost_update [L836-L836] multithreaded = 1; [2024-06-27 17:49:12,402 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:49:12,559 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi003_tso.i[944,957] [2024-06-27 17:49:12,768 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:49:12,779 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:49:12,809 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi003_tso.i[944,957] Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:49:12,873 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:49:12,912 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:49:12,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:12 WrapperNode [2024-06-27 17:49:12,912 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:49:12,914 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:49:12,914 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:49:12,914 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:49:12,920 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:12" (1/1) ... [2024-06-27 17:49:12,947 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:12" (1/1) ... [2024-06-27 17:49:13,028 INFO L138 Inliner]: procedures = 174, calls = 39, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 173 [2024-06-27 17:49:13,029 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:49:13,030 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:49:13,030 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:49:13,030 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:49:13,045 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:12" (1/1) ... [2024-06-27 17:49:13,045 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:12" (1/1) ... [2024-06-27 17:49:13,056 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:12" (1/1) ... [2024-06-27 17:49:13,070 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]. [2024-06-27 17:49:13,070 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:12" (1/1) ... [2024-06-27 17:49:13,070 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:12" (1/1) ... [2024-06-27 17:49:13,077 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:12" (1/1) ... [2024-06-27 17:49:13,079 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:12" (1/1) ... [2024-06-27 17:49:13,081 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:12" (1/1) ... [2024-06-27 17:49:13,082 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:12" (1/1) ... [2024-06-27 17:49:13,085 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:49:13,086 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:49:13,086 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:49:13,086 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:49:13,087 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:12" (1/1) ... [2024-06-27 17:49:13,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:49:13,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:49:13,115 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) [2024-06-27 17:49:13,126 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 [2024-06-27 17:49:13,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:49:13,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:49:13,149 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:49:13,149 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:49:13,150 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:49:13,150 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:49:13,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:49:13,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:49:13,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:49:13,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:49:13,152 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:49:13,262 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:49:13,264 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:49:13,625 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:49:13,626 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:49:13,800 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:49:13,800 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:49:13,801 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:49:13 BoogieIcfgContainer [2024-06-27 17:49:13,801 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:49:13,803 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:49:13,803 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:49:13,806 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:49:13,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:49:11" (1/4) ... [2024-06-27 17:49:13,806 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f3bc5b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:49:13, skipping insertion in model container [2024-06-27 17:49:13,807 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:49:12" (2/4) ... [2024-06-27 17:49:13,807 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f3bc5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:49:13, skipping insertion in model container [2024-06-27 17:49:13,807 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:12" (3/4) ... [2024-06-27 17:49:13,811 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f3bc5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:49:13, skipping insertion in model container [2024-06-27 17:49:13,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:49:13" (4/4) ... [2024-06-27 17:49:13,812 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi003_tso.i [2024-06-27 17:49:13,826 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:49:13,826 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 17:49:13,826 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:49:13,859 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:49:13,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 38 transitions, 84 flow [2024-06-27 17:49:13,957 INFO L124 PetriNetUnfolderBase]: 1/36 cut-off events. [2024-06-27 17:49:13,957 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:49:13,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 36 events. 1/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2024-06-27 17:49:13,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 38 transitions, 84 flow [2024-06-27 17:49:13,964 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 36 transitions, 78 flow [2024-06-27 17:49:14,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:49:14,014 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;@4a424713, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:49:14,014 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 17:49:14,017 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:49:14,017 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 17:49:14,017 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:49:14,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:14,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:49:14,023 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:14,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:14,032 INFO L85 PathProgramCache]: Analyzing trace with hash 393106488, now seen corresponding path program 1 times [2024-06-27 17:49:14,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:14,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080106506] [2024-06-27 17:49:14,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:14,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:14,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:14,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080106506] [2024-06-27 17:49:14,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080106506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:14,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:14,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:49:14,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477131562] [2024-06-27 17:49:14,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:14,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:49:14,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:14,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:49:14,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:49:14,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-06-27 17:49:14,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 78 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) [2024-06-27 17:49:14,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:14,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-06-27 17:49:14,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:15,203 INFO L124 PetriNetUnfolderBase]: 708/1181 cut-off events. [2024-06-27 17:49:15,204 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-27 17:49:15,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2362 conditions, 1181 events. 708/1181 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5902 event pairs, 311 based on Foata normal form. 55/1179 useless extension candidates. Maximal degree in co-relation 2351. Up to 1153 conditions per place. [2024-06-27 17:49:15,211 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 34 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2024-06-27 17:49:15,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 175 flow [2024-06-27 17:49:15,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:49:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:49:15,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-06-27 17:49:15,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6491228070175439 [2024-06-27 17:49:15,222 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 78 flow. Second operand 3 states and 74 transitions. [2024-06-27 17:49:15,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 175 flow [2024-06-27 17:49:15,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:15,226 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 95 flow [2024-06-27 17:49:15,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-06-27 17:49:15,230 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2024-06-27 17:49:15,230 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 95 flow [2024-06-27 17:49:15,230 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) [2024-06-27 17:49:15,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:15,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:15,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:49:15,231 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:15,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:15,232 INFO L85 PathProgramCache]: Analyzing trace with hash -181686223, now seen corresponding path program 1 times [2024-06-27 17:49:15,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:15,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129807274] [2024-06-27 17:49:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:15,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:15,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:15,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129807274] [2024-06-27 17:49:15,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129807274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:15,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:15,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:49:15,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050816707] [2024-06-27 17:49:15,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:15,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:49:15,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:15,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:49:15,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:49:15,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-06-27 17:49:15,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:15,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:15,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-06-27 17:49:15,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:15,934 INFO L124 PetriNetUnfolderBase]: 699/1304 cut-off events. [2024-06-27 17:49:15,935 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2024-06-27 17:49:15,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2658 conditions, 1304 events. 699/1304 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 7142 event pairs, 383 based on Foata normal form. 6/1213 useless extension candidates. Maximal degree in co-relation 2646. Up to 1102 conditions per place. [2024-06-27 17:49:15,942 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 41 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-27 17:49:15,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 243 flow [2024-06-27 17:49:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:49:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:49:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-27 17:49:15,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6052631578947368 [2024-06-27 17:49:15,944 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 95 flow. Second operand 4 states and 92 transitions. [2024-06-27 17:49:15,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 243 flow [2024-06-27 17:49:15,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:15,946 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 146 flow [2024-06-27 17:49:15,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2024-06-27 17:49:15,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2024-06-27 17:49:15,947 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 146 flow [2024-06-27 17:49:15,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:15,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:15,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:15,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:49:15,948 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:15,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:15,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1409715982, now seen corresponding path program 1 times [2024-06-27 17:49:15,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:15,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526880971] [2024-06-27 17:49:15,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:15,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:15,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:15,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526880971] [2024-06-27 17:49:15,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526880971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:15,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:15,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:49:15,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022125653] [2024-06-27 17:49:15,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:16,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:49:16,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:16,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:49:16,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:49:16,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 38 [2024-06-27 17:49:16,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:16,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:16,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 38 [2024-06-27 17:49:16,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:16,138 INFO L124 PetriNetUnfolderBase]: 312/661 cut-off events. [2024-06-27 17:49:16,138 INFO L125 PetriNetUnfolderBase]: For 46/49 co-relation queries the response was YES. [2024-06-27 17:49:16,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1324 conditions, 661 events. 312/661 cut-off events. For 46/49 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3756 event pairs, 45 based on Foata normal form. 3/635 useless extension candidates. Maximal degree in co-relation 1309. Up to 440 conditions per place. [2024-06-27 17:49:16,141 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 28 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-06-27 17:49:16,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 224 flow [2024-06-27 17:49:16,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:49:16,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:49:16,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-27 17:49:16,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7017543859649122 [2024-06-27 17:49:16,143 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 146 flow. Second operand 3 states and 80 transitions. [2024-06-27 17:49:16,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 224 flow [2024-06-27 17:49:16,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 222 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 17:49:16,145 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 146 flow [2024-06-27 17:49:16,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2024-06-27 17:49:16,145 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-27 17:49:16,151 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 146 flow [2024-06-27 17:49:16,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:16,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:16,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:16,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:49:16,152 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:16,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:16,152 INFO L85 PathProgramCache]: Analyzing trace with hash 751521904, now seen corresponding path program 1 times [2024-06-27 17:49:16,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:16,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236156262] [2024-06-27 17:49:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:16,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:16,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:16,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236156262] [2024-06-27 17:49:16,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236156262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:16,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:16,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:16,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815087995] [2024-06-27 17:49:16,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:16,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:16,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:16,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:16,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:16,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:16,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:16,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:16,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:16,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:16,885 INFO L124 PetriNetUnfolderBase]: 825/1519 cut-off events. [2024-06-27 17:49:16,885 INFO L125 PetriNetUnfolderBase]: For 488/488 co-relation queries the response was YES. [2024-06-27 17:49:16,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3415 conditions, 1519 events. 825/1519 cut-off events. For 488/488 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 8119 event pairs, 478 based on Foata normal form. 1/1463 useless extension candidates. Maximal degree in co-relation 3397. Up to 1321 conditions per place. [2024-06-27 17:49:16,892 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 43 selfloop transitions, 8 changer transitions 3/60 dead transitions. [2024-06-27 17:49:16,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 60 transitions, 298 flow [2024-06-27 17:49:16,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-27 17:49:16,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2024-06-27 17:49:16,897 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 146 flow. Second operand 5 states and 90 transitions. [2024-06-27 17:49:16,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 60 transitions, 298 flow [2024-06-27 17:49:16,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 60 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:16,901 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 172 flow [2024-06-27 17:49:16,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-27 17:49:16,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-27 17:49:16,902 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 172 flow [2024-06-27 17:49:16,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:16,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:16,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:16,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:49:16,903 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:16,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:16,904 INFO L85 PathProgramCache]: Analyzing trace with hash 460733295, now seen corresponding path program 1 times [2024-06-27 17:49:16,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:16,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341928037] [2024-06-27 17:49:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:16,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:18,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:18,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341928037] [2024-06-27 17:49:18,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341928037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:18,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:18,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:18,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852999213] [2024-06-27 17:49:18,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:18,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:18,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:18,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:18,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:18,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 38 [2024-06-27 17:49:18,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 172 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:18,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:18,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 38 [2024-06-27 17:49:18,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:18,646 INFO L124 PetriNetUnfolderBase]: 627/1185 cut-off events. [2024-06-27 17:49:18,646 INFO L125 PetriNetUnfolderBase]: For 673/673 co-relation queries the response was YES. [2024-06-27 17:49:18,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2800 conditions, 1185 events. 627/1185 cut-off events. For 673/673 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6349 event pairs, 127 based on Foata normal form. 4/1139 useless extension candidates. Maximal degree in co-relation 2781. Up to 948 conditions per place. [2024-06-27 17:49:18,653 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 51 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-27 17:49:18,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 368 flow [2024-06-27 17:49:18,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:18,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-27 17:49:18,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307017543859649 [2024-06-27 17:49:18,654 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 172 flow. Second operand 6 states and 121 transitions. [2024-06-27 17:49:18,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 368 flow [2024-06-27 17:49:18,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 354 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:18,657 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 213 flow [2024-06-27 17:49:18,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=213, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-27 17:49:18,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-27 17:49:18,658 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 213 flow [2024-06-27 17:49:18,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:18,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:18,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:18,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:49:18,659 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:18,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:18,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1795560322, now seen corresponding path program 1 times [2024-06-27 17:49:18,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:18,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018015081] [2024-06-27 17:49:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:18,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:19,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:19,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018015081] [2024-06-27 17:49:19,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018015081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:19,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:19,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:19,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825715408] [2024-06-27 17:49:19,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:19,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:19,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:19,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:19,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:19,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:19,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 213 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) [2024-06-27 17:49:19,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:19,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:19,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:19,427 INFO L124 PetriNetUnfolderBase]: 727/1342 cut-off events. [2024-06-27 17:49:19,427 INFO L125 PetriNetUnfolderBase]: For 1108/1108 co-relation queries the response was YES. [2024-06-27 17:49:19,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3405 conditions, 1342 events. 727/1342 cut-off events. For 1108/1108 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7006 event pairs, 347 based on Foata normal form. 1/1293 useless extension candidates. Maximal degree in co-relation 3384. Up to 1167 conditions per place. [2024-06-27 17:49:19,435 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 54 selfloop transitions, 10 changer transitions 0/70 dead transitions. [2024-06-27 17:49:19,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 70 transitions, 419 flow [2024-06-27 17:49:19,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:19,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:19,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-27 17:49:19,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298245614035088 [2024-06-27 17:49:19,436 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 213 flow. Second operand 6 states and 98 transitions. [2024-06-27 17:49:19,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 70 transitions, 419 flow [2024-06-27 17:49:19,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 70 transitions, 390 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:19,439 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 275 flow [2024-06-27 17:49:19,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=275, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-27 17:49:19,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-27 17:49:19,440 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 275 flow [2024-06-27 17:49:19,440 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) [2024-06-27 17:49:19,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:19,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:19,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:49:19,441 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:19,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:19,441 INFO L85 PathProgramCache]: Analyzing trace with hash -172451057, now seen corresponding path program 1 times [2024-06-27 17:49:19,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:19,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160476482] [2024-06-27 17:49:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:19,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:19,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:19,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160476482] [2024-06-27 17:49:19,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160476482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:19,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:19,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:19,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877460618] [2024-06-27 17:49:19,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:19,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:19,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:19,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:19,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:19,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:19,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 275 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) [2024-06-27 17:49:19,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:19,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:19,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:20,265 INFO L124 PetriNetUnfolderBase]: 747/1394 cut-off events. [2024-06-27 17:49:20,266 INFO L125 PetriNetUnfolderBase]: For 1625/1625 co-relation queries the response was YES. [2024-06-27 17:49:20,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3769 conditions, 1394 events. 747/1394 cut-off events. For 1625/1625 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7407 event pairs, 244 based on Foata normal form. 2/1339 useless extension candidates. Maximal degree in co-relation 3744. Up to 1130 conditions per place. [2024-06-27 17:49:20,273 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 59 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-27 17:49:20,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 539 flow [2024-06-27 17:49:20,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:20,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 17:49:20,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4692982456140351 [2024-06-27 17:49:20,274 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 275 flow. Second operand 6 states and 107 transitions. [2024-06-27 17:49:20,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 539 flow [2024-06-27 17:49:20,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 526 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:20,278 INFO L231 Difference]: Finished difference. Result has 63 places, 64 transitions, 371 flow [2024-06-27 17:49:20,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=371, PETRI_PLACES=63, PETRI_TRANSITIONS=64} [2024-06-27 17:49:20,278 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-27 17:49:20,278 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 64 transitions, 371 flow [2024-06-27 17:49:20,279 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) [2024-06-27 17:49:20,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:20,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:20,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:49:20,279 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:20,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:20,280 INFO L85 PathProgramCache]: Analyzing trace with hash 658061263, now seen corresponding path program 2 times [2024-06-27 17:49:20,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:20,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528617494] [2024-06-27 17:49:20,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:20,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:20,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:20,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528617494] [2024-06-27 17:49:20,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528617494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:20,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:20,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:20,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7727076] [2024-06-27 17:49:20,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:20,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:20,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:20,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:20,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:20,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:20,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 64 transitions, 371 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) [2024-06-27 17:49:20,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:20,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:20,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:21,069 INFO L124 PetriNetUnfolderBase]: 743/1391 cut-off events. [2024-06-27 17:49:21,069 INFO L125 PetriNetUnfolderBase]: For 2201/2204 co-relation queries the response was YES. [2024-06-27 17:49:21,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4004 conditions, 1391 events. 743/1391 cut-off events. For 2201/2204 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7409 event pairs, 252 based on Foata normal form. 4/1336 useless extension candidates. Maximal degree in co-relation 3976. Up to 1127 conditions per place. [2024-06-27 17:49:21,077 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 57 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-27 17:49:21,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 82 transitions, 573 flow [2024-06-27 17:49:21,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:21,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-27 17:49:21,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2024-06-27 17:49:21,078 INFO L175 Difference]: Start difference. First operand has 63 places, 64 transitions, 371 flow. Second operand 6 states and 104 transitions. [2024-06-27 17:49:21,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 82 transitions, 573 flow [2024-06-27 17:49:21,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 82 transitions, 555 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:21,083 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 398 flow [2024-06-27 17:49:21,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=398, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-06-27 17:49:21,083 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-27 17:49:21,083 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 398 flow [2024-06-27 17:49:21,084 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) [2024-06-27 17:49:21,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:21,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:21,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:49:21,084 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:21,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:21,085 INFO L85 PathProgramCache]: Analyzing trace with hash -172203987, now seen corresponding path program 1 times [2024-06-27 17:49:21,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:21,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884848730] [2024-06-27 17:49:21,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:21,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:21,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:21,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884848730] [2024-06-27 17:49:21,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884848730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:21,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:21,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:21,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682312172] [2024-06-27 17:49:21,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:21,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:21,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:21,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:21,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:21,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:21,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 398 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) [2024-06-27 17:49:21,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:21,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:21,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:22,022 INFO L124 PetriNetUnfolderBase]: 746/1395 cut-off events. [2024-06-27 17:49:22,022 INFO L125 PetriNetUnfolderBase]: For 2494/2494 co-relation queries the response was YES. [2024-06-27 17:49:22,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4067 conditions, 1395 events. 746/1395 cut-off events. For 2494/2494 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 7419 event pairs, 335 based on Foata normal form. 1/1338 useless extension candidates. Maximal degree in co-relation 4036. Up to 1184 conditions per place. [2024-06-27 17:49:22,030 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 68 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2024-06-27 17:49:22,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 634 flow [2024-06-27 17:49:22,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:22,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:22,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 17:49:22,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 17:49:22,032 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 398 flow. Second operand 7 states and 114 transitions. [2024-06-27 17:49:22,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 634 flow [2024-06-27 17:49:22,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 87 transitions, 598 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:22,036 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 418 flow [2024-06-27 17:49:22,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=418, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2024-06-27 17:49:22,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-27 17:49:22,037 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 418 flow [2024-06-27 17:49:22,037 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) [2024-06-27 17:49:22,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:22,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:22,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:49:22,038 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:22,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:22,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1250316413, now seen corresponding path program 1 times [2024-06-27 17:49:22,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:22,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954502144] [2024-06-27 17:49:22,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:22,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:22,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:22,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954502144] [2024-06-27 17:49:22,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954502144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:22,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:22,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:22,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703325481] [2024-06-27 17:49:22,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:22,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:22,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:22,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:22,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:22,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:22,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 418 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) [2024-06-27 17:49:22,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:22,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:22,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:22,897 INFO L124 PetriNetUnfolderBase]: 772/1438 cut-off events. [2024-06-27 17:49:22,898 INFO L125 PetriNetUnfolderBase]: For 3201/3204 co-relation queries the response was YES. [2024-06-27 17:49:22,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4345 conditions, 1438 events. 772/1438 cut-off events. For 3201/3204 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 7666 event pairs, 254 based on Foata normal form. 4/1383 useless extension candidates. Maximal degree in co-relation 4313. Up to 1149 conditions per place. [2024-06-27 17:49:22,906 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 65 selfloop transitions, 31 changer transitions 0/102 dead transitions. [2024-06-27 17:49:22,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 102 transitions, 738 flow [2024-06-27 17:49:22,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:22,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:22,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 17:49:22,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45864661654135336 [2024-06-27 17:49:22,908 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 418 flow. Second operand 7 states and 122 transitions. [2024-06-27 17:49:22,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 102 transitions, 738 flow [2024-06-27 17:49:22,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 102 transitions, 704 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:22,913 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 555 flow [2024-06-27 17:49:22,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=555, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-27 17:49:22,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-27 17:49:22,914 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 555 flow [2024-06-27 17:49:22,914 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) [2024-06-27 17:49:22,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:22,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:22,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:49:22,914 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:22,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:22,915 INFO L85 PathProgramCache]: Analyzing trace with hash -782464669, now seen corresponding path program 2 times [2024-06-27 17:49:22,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:22,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546866451] [2024-06-27 17:49:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:22,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:23,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:23,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546866451] [2024-06-27 17:49:23,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546866451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:23,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:23,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:23,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412515745] [2024-06-27 17:49:23,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:23,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:23,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:23,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:23,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:23,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:23,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 555 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) [2024-06-27 17:49:23,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:23,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:23,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:23,807 INFO L124 PetriNetUnfolderBase]: 792/1465 cut-off events. [2024-06-27 17:49:23,807 INFO L125 PetriNetUnfolderBase]: For 4463/4466 co-relation queries the response was YES. [2024-06-27 17:49:23,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4994 conditions, 1465 events. 792/1465 cut-off events. For 4463/4466 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7801 event pairs, 232 based on Foata normal form. 4/1410 useless extension candidates. Maximal degree in co-relation 4959. Up to 1118 conditions per place. [2024-06-27 17:49:23,815 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 74 selfloop transitions, 35 changer transitions 0/115 dead transitions. [2024-06-27 17:49:23,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 115 transitions, 971 flow [2024-06-27 17:49:23,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:23,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:23,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 17:49:23,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45864661654135336 [2024-06-27 17:49:23,817 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 555 flow. Second operand 7 states and 122 transitions. [2024-06-27 17:49:23,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 115 transitions, 971 flow [2024-06-27 17:49:23,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 115 transitions, 925 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:23,822 INFO L231 Difference]: Finished difference. Result has 81 places, 89 transitions, 685 flow [2024-06-27 17:49:23,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=685, PETRI_PLACES=81, PETRI_TRANSITIONS=89} [2024-06-27 17:49:23,823 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-27 17:49:23,823 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 89 transitions, 685 flow [2024-06-27 17:49:23,823 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) [2024-06-27 17:49:23,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:23,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:23,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:49:23,824 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:23,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:23,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1906105379, now seen corresponding path program 3 times [2024-06-27 17:49:23,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:23,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985613323] [2024-06-27 17:49:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:23,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:24,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:24,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985613323] [2024-06-27 17:49:24,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985613323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:24,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:24,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:24,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752090464] [2024-06-27 17:49:24,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:24,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:24,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:24,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:24,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:24,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:24,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 89 transitions, 685 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) [2024-06-27 17:49:24,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:24,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:24,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:24,642 INFO L124 PetriNetUnfolderBase]: 802/1480 cut-off events. [2024-06-27 17:49:24,642 INFO L125 PetriNetUnfolderBase]: For 5702/5705 co-relation queries the response was YES. [2024-06-27 17:49:24,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5398 conditions, 1480 events. 802/1480 cut-off events. For 5702/5705 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 7832 event pairs, 250 based on Foata normal form. 4/1425 useless extension candidates. Maximal degree in co-relation 5360. Up to 1194 conditions per place. [2024-06-27 17:49:24,656 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 79 selfloop transitions, 30 changer transitions 0/115 dead transitions. [2024-06-27 17:49:24,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 115 transitions, 1026 flow [2024-06-27 17:49:24,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:24,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 17:49:24,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4473684210526316 [2024-06-27 17:49:24,658 INFO L175 Difference]: Start difference. First operand has 81 places, 89 transitions, 685 flow. Second operand 7 states and 119 transitions. [2024-06-27 17:49:24,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 115 transitions, 1026 flow [2024-06-27 17:49:24,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 115 transitions, 968 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:24,666 INFO L231 Difference]: Finished difference. Result has 86 places, 94 transitions, 752 flow [2024-06-27 17:49:24,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=752, PETRI_PLACES=86, PETRI_TRANSITIONS=94} [2024-06-27 17:49:24,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-27 17:49:24,668 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 94 transitions, 752 flow [2024-06-27 17:49:24,669 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) [2024-06-27 17:49:24,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:24,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:24,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:49:24,669 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:24,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:24,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1905797797, now seen corresponding path program 1 times [2024-06-27 17:49:24,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:24,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091580197] [2024-06-27 17:49:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:24,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:25,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:25,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091580197] [2024-06-27 17:49:25,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091580197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:25,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:25,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:49:25,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616023500] [2024-06-27 17:49:25,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:25,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:49:25,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:25,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:49:25,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:49:25,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:25,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 94 transitions, 752 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) [2024-06-27 17:49:25,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:25,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:25,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:26,428 INFO L124 PetriNetUnfolderBase]: 808/1495 cut-off events. [2024-06-27 17:49:26,429 INFO L125 PetriNetUnfolderBase]: For 6076/6076 co-relation queries the response was YES. [2024-06-27 17:49:26,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5563 conditions, 1495 events. 808/1495 cut-off events. For 6076/6076 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7980 event pairs, 270 based on Foata normal form. 1/1436 useless extension candidates. Maximal degree in co-relation 5522. Up to 1261 conditions per place. [2024-06-27 17:49:26,436 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 100 selfloop transitions, 18 changer transitions 0/124 dead transitions. [2024-06-27 17:49:26,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 124 transitions, 1119 flow [2024-06-27 17:49:26,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:26,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 17:49:26,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276315789473684 [2024-06-27 17:49:26,438 INFO L175 Difference]: Start difference. First operand has 86 places, 94 transitions, 752 flow. Second operand 8 states and 130 transitions. [2024-06-27 17:49:26,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 124 transitions, 1119 flow [2024-06-27 17:49:26,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 124 transitions, 1076 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:26,445 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 793 flow [2024-06-27 17:49:26,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=793, PETRI_PLACES=92, PETRI_TRANSITIONS=98} [2024-06-27 17:49:26,446 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-27 17:49:26,446 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 793 flow [2024-06-27 17:49:26,446 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) [2024-06-27 17:49:26,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:26,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:26,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:49:26,447 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:26,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:26,447 INFO L85 PathProgramCache]: Analyzing trace with hash -109871796, now seen corresponding path program 1 times [2024-06-27 17:49:26,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:26,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338970029] [2024-06-27 17:49:26,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:26,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:27,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:27,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338970029] [2024-06-27 17:49:27,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338970029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:27,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:27,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:49:27,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989134605] [2024-06-27 17:49:27,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:27,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:49:27,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:27,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:49:27,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:49:27,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:27,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 793 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) [2024-06-27 17:49:27,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:27,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:27,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:27,630 INFO L124 PetriNetUnfolderBase]: 828/1525 cut-off events. [2024-06-27 17:49:27,630 INFO L125 PetriNetUnfolderBase]: For 6730/6730 co-relation queries the response was YES. [2024-06-27 17:49:27,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5846 conditions, 1525 events. 828/1525 cut-off events. For 6730/6730 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 8169 event pairs, 175 based on Foata normal form. 2/1467 useless extension candidates. Maximal degree in co-relation 5803. Up to 1252 conditions per place. [2024-06-27 17:49:27,640 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 104 selfloop transitions, 18 changer transitions 0/128 dead transitions. [2024-06-27 17:49:27,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 128 transitions, 1149 flow [2024-06-27 17:49:27,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:27,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 17:49:27,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.462406015037594 [2024-06-27 17:49:27,642 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 793 flow. Second operand 7 states and 123 transitions. [2024-06-27 17:49:27,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 128 transitions, 1149 flow [2024-06-27 17:49:27,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 128 transitions, 1118 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:27,652 INFO L231 Difference]: Finished difference. Result has 95 places, 101 transitions, 834 flow [2024-06-27 17:49:27,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=834, PETRI_PLACES=95, PETRI_TRANSITIONS=101} [2024-06-27 17:49:27,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-27 17:49:27,653 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 101 transitions, 834 flow [2024-06-27 17:49:27,653 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) [2024-06-27 17:49:27,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:27,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:27,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:49:27,654 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:27,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:27,654 INFO L85 PathProgramCache]: Analyzing trace with hash -109751609, now seen corresponding path program 1 times [2024-06-27 17:49:27,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:27,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890545239] [2024-06-27 17:49:27,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:27,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:28,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:28,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890545239] [2024-06-27 17:49:28,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890545239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:28,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:28,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:49:28,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331333700] [2024-06-27 17:49:28,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:28,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:49:28,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:28,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:49:28,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:49:28,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:28,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 101 transitions, 834 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) [2024-06-27 17:49:28,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:28,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:28,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:28,919 INFO L124 PetriNetUnfolderBase]: 902/1644 cut-off events. [2024-06-27 17:49:28,919 INFO L125 PetriNetUnfolderBase]: For 8249/8249 co-relation queries the response was YES. [2024-06-27 17:49:28,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6653 conditions, 1644 events. 902/1644 cut-off events. For 8249/8249 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8825 event pairs, 245 based on Foata normal form. 1/1583 useless extension candidates. Maximal degree in co-relation 6608. Up to 1296 conditions per place. [2024-06-27 17:49:28,927 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 101 selfloop transitions, 39 changer transitions 0/146 dead transitions. [2024-06-27 17:49:28,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 146 transitions, 1419 flow [2024-06-27 17:49:28,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:28,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:28,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 17:49:28,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 17:49:28,929 INFO L175 Difference]: Start difference. First operand has 95 places, 101 transitions, 834 flow. Second operand 8 states and 133 transitions. [2024-06-27 17:49:28,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 146 transitions, 1419 flow [2024-06-27 17:49:28,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 146 transitions, 1343 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 17:49:28,940 INFO L231 Difference]: Finished difference. Result has 100 places, 118 transitions, 1074 flow [2024-06-27 17:49:28,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1074, PETRI_PLACES=100, PETRI_TRANSITIONS=118} [2024-06-27 17:49:28,940 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-27 17:49:28,940 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 118 transitions, 1074 flow [2024-06-27 17:49:28,941 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) [2024-06-27 17:49:28,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:28,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:28,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:49:28,941 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:28,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:28,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1979158195, now seen corresponding path program 2 times [2024-06-27 17:49:28,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:28,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313008726] [2024-06-27 17:49:28,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:28,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:29,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:29,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313008726] [2024-06-27 17:49:29,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313008726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:29,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:29,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:49:29,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412522382] [2024-06-27 17:49:29,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:29,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:49:29,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:29,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:49:29,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:49:29,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:29,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 118 transitions, 1074 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) [2024-06-27 17:49:29,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:29,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:29,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:30,046 INFO L124 PetriNetUnfolderBase]: 982/1765 cut-off events. [2024-06-27 17:49:30,046 INFO L125 PetriNetUnfolderBase]: For 9598/9598 co-relation queries the response was YES. [2024-06-27 17:49:30,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7634 conditions, 1765 events. 982/1765 cut-off events. For 9598/9598 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9450 event pairs, 237 based on Foata normal form. 1/1707 useless extension candidates. Maximal degree in co-relation 7586. Up to 1367 conditions per place. [2024-06-27 17:49:30,058 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 111 selfloop transitions, 63 changer transitions 0/180 dead transitions. [2024-06-27 17:49:30,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 180 transitions, 1902 flow [2024-06-27 17:49:30,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 17:49:30,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4605263157894737 [2024-06-27 17:49:30,060 INFO L175 Difference]: Start difference. First operand has 100 places, 118 transitions, 1074 flow. Second operand 8 states and 140 transitions. [2024-06-27 17:49:30,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 180 transitions, 1902 flow [2024-06-27 17:49:30,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 180 transitions, 1831 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:30,076 INFO L231 Difference]: Finished difference. Result has 108 places, 145 transitions, 1534 flow [2024-06-27 17:49:30,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1534, PETRI_PLACES=108, PETRI_TRANSITIONS=145} [2024-06-27 17:49:30,077 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-27 17:49:30,077 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 145 transitions, 1534 flow [2024-06-27 17:49:30,078 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) [2024-06-27 17:49:30,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:30,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:30,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:49:30,078 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:30,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:30,078 INFO L85 PathProgramCache]: Analyzing trace with hash 140229278, now seen corresponding path program 2 times [2024-06-27 17:49:30,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:30,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424644928] [2024-06-27 17:49:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:30,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:30,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:30,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424644928] [2024-06-27 17:49:30,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424644928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:30,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:30,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:30,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231879116] [2024-06-27 17:49:30,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:30,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:30,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:30,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:30,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:30,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-06-27 17:49:30,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 145 transitions, 1534 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:30,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:30,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-06-27 17:49:30,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:30,992 INFO L124 PetriNetUnfolderBase]: 945/1725 cut-off events. [2024-06-27 17:49:30,992 INFO L125 PetriNetUnfolderBase]: For 10288/10310 co-relation queries the response was YES. [2024-06-27 17:49:30,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7649 conditions, 1725 events. 945/1725 cut-off events. For 10288/10310 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9339 event pairs, 199 based on Foata normal form. 14/1670 useless extension candidates. Maximal degree in co-relation 7597. Up to 1245 conditions per place. [2024-06-27 17:49:31,002 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 96 selfloop transitions, 53 changer transitions 0/169 dead transitions. [2024-06-27 17:49:31,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 169 transitions, 1950 flow [2024-06-27 17:49:31,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:31,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:31,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-27 17:49:31,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4868421052631579 [2024-06-27 17:49:31,004 INFO L175 Difference]: Start difference. First operand has 108 places, 145 transitions, 1534 flow. Second operand 6 states and 111 transitions. [2024-06-27 17:49:31,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 169 transitions, 1950 flow [2024-06-27 17:49:31,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 169 transitions, 1866 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:31,020 INFO L231 Difference]: Finished difference. Result has 111 places, 148 transitions, 1603 flow [2024-06-27 17:49:31,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1450, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1603, PETRI_PLACES=111, PETRI_TRANSITIONS=148} [2024-06-27 17:49:31,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-27 17:49:31,020 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 148 transitions, 1603 flow [2024-06-27 17:49:31,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:31,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:31,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:31,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:49:31,021 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:31,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:31,022 INFO L85 PathProgramCache]: Analyzing trace with hash -863664850, now seen corresponding path program 1 times [2024-06-27 17:49:31,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:31,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668607607] [2024-06-27 17:49:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:31,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:31,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:31,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668607607] [2024-06-27 17:49:31,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668607607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:31,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:31,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:49:31,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110747139] [2024-06-27 17:49:31,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:31,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:49:31,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:31,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:49:31,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:49:31,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:31,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 148 transitions, 1603 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) [2024-06-27 17:49:31,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:31,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:31,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:32,154 INFO L124 PetriNetUnfolderBase]: 1016/1826 cut-off events. [2024-06-27 17:49:32,154 INFO L125 PetriNetUnfolderBase]: For 13062/13062 co-relation queries the response was YES. [2024-06-27 17:49:32,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8357 conditions, 1826 events. 1016/1826 cut-off events. For 13062/13062 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9803 event pairs, 250 based on Foata normal form. 2/1765 useless extension candidates. Maximal degree in co-relation 8303. Up to 1343 conditions per place. [2024-06-27 17:49:32,166 INFO L140 encePairwiseOnDemand]: 24/38 looper letters, 127 selfloop transitions, 68 changer transitions 0/201 dead transitions. [2024-06-27 17:49:32,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 201 transitions, 2273 flow [2024-06-27 17:49:32,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:49:32,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:49:32,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 17:49:32,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590643274853801 [2024-06-27 17:49:32,168 INFO L175 Difference]: Start difference. First operand has 111 places, 148 transitions, 1603 flow. Second operand 9 states and 157 transitions. [2024-06-27 17:49:32,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 201 transitions, 2273 flow [2024-06-27 17:49:32,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 201 transitions, 2152 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:32,188 INFO L231 Difference]: Finished difference. Result has 118 places, 167 transitions, 1820 flow [2024-06-27 17:49:32,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1820, PETRI_PLACES=118, PETRI_TRANSITIONS=167} [2024-06-27 17:49:32,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-27 17:49:32,189 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 167 transitions, 1820 flow [2024-06-27 17:49:32,189 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) [2024-06-27 17:49:32,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:32,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:32,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:49:32,189 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:32,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:32,190 INFO L85 PathProgramCache]: Analyzing trace with hash -105102260, now seen corresponding path program 2 times [2024-06-27 17:49:32,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:32,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456938601] [2024-06-27 17:49:32,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:32,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:32,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:32,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456938601] [2024-06-27 17:49:32,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456938601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:32,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:32,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:49:32,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270465904] [2024-06-27 17:49:32,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:32,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:49:32,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:32,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:49:32,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:49:32,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:32,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 167 transitions, 1820 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) [2024-06-27 17:49:32,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:32,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:32,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:33,285 INFO L124 PetriNetUnfolderBase]: 1051/1887 cut-off events. [2024-06-27 17:49:33,285 INFO L125 PetriNetUnfolderBase]: For 15106/15106 co-relation queries the response was YES. [2024-06-27 17:49:33,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9091 conditions, 1887 events. 1051/1887 cut-off events. For 15106/15106 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10217 event pairs, 252 based on Foata normal form. 2/1824 useless extension candidates. Maximal degree in co-relation 9034. Up to 1336 conditions per place. [2024-06-27 17:49:33,297 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 124 selfloop transitions, 77 changer transitions 0/207 dead transitions. [2024-06-27 17:49:33,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 207 transitions, 2443 flow [2024-06-27 17:49:33,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:33,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 17:49:33,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47039473684210525 [2024-06-27 17:49:33,301 INFO L175 Difference]: Start difference. First operand has 118 places, 167 transitions, 1820 flow. Second operand 8 states and 143 transitions. [2024-06-27 17:49:33,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 207 transitions, 2443 flow [2024-06-27 17:49:33,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 207 transitions, 2393 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:33,326 INFO L231 Difference]: Finished difference. Result has 127 places, 175 transitions, 2075 flow [2024-06-27 17:49:33,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2075, PETRI_PLACES=127, PETRI_TRANSITIONS=175} [2024-06-27 17:49:33,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-27 17:49:33,327 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 175 transitions, 2075 flow [2024-06-27 17:49:33,327 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) [2024-06-27 17:49:33,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:33,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:33,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:49:33,329 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:33,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:33,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1036708398, now seen corresponding path program 3 times [2024-06-27 17:49:33,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:33,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478366019] [2024-06-27 17:49:33,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:33,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:33,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:33,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478366019] [2024-06-27 17:49:33,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478366019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:33,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:33,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:49:33,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449007168] [2024-06-27 17:49:33,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:33,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:49:33,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:33,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:49:33,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:49:33,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:33,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 175 transitions, 2075 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) [2024-06-27 17:49:33,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:33,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:33,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:34,401 INFO L124 PetriNetUnfolderBase]: 1083/1946 cut-off events. [2024-06-27 17:49:34,401 INFO L125 PetriNetUnfolderBase]: For 17805/17805 co-relation queries the response was YES. [2024-06-27 17:49:34,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9955 conditions, 1946 events. 1083/1946 cut-off events. For 17805/17805 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10631 event pairs, 268 based on Foata normal form. 2/1878 useless extension candidates. Maximal degree in co-relation 9893. Up to 1457 conditions per place. [2024-06-27 17:49:34,412 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 150 selfloop transitions, 59 changer transitions 0/215 dead transitions. [2024-06-27 17:49:34,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 215 transitions, 2743 flow [2024-06-27 17:49:34,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:34,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:34,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 17:49:34,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4605263157894737 [2024-06-27 17:49:34,413 INFO L175 Difference]: Start difference. First operand has 127 places, 175 transitions, 2075 flow. Second operand 8 states and 140 transitions. [2024-06-27 17:49:34,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 215 transitions, 2743 flow [2024-06-27 17:49:34,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 215 transitions, 2637 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:34,441 INFO L231 Difference]: Finished difference. Result has 136 places, 183 transitions, 2242 flow [2024-06-27 17:49:34,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1979, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2242, PETRI_PLACES=136, PETRI_TRANSITIONS=183} [2024-06-27 17:49:34,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-27 17:49:34,441 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 183 transitions, 2242 flow [2024-06-27 17:49:34,442 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) [2024-06-27 17:49:34,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:34,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:34,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:49:34,442 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:34,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:34,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2015383854, now seen corresponding path program 4 times [2024-06-27 17:49:34,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:34,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437409226] [2024-06-27 17:49:34,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:34,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:35,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:35,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437409226] [2024-06-27 17:49:35,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437409226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:35,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:35,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:49:35,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394650640] [2024-06-27 17:49:35,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:35,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:49:35,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:35,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:49:35,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:49:35,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:35,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 183 transitions, 2242 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) [2024-06-27 17:49:35,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:35,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:35,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:35,675 INFO L124 PetriNetUnfolderBase]: 1135/2030 cut-off events. [2024-06-27 17:49:35,675 INFO L125 PetriNetUnfolderBase]: For 19100/19100 co-relation queries the response was YES. [2024-06-27 17:49:35,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10691 conditions, 2030 events. 1135/2030 cut-off events. For 19100/19100 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11216 event pairs, 261 based on Foata normal form. 2/1961 useless extension candidates. Maximal degree in co-relation 10624. Up to 1168 conditions per place. [2024-06-27 17:49:35,692 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 147 selfloop transitions, 78 changer transitions 0/231 dead transitions. [2024-06-27 17:49:35,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 231 transitions, 3107 flow [2024-06-27 17:49:35,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 17:49:35,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48026315789473684 [2024-06-27 17:49:35,694 INFO L175 Difference]: Start difference. First operand has 136 places, 183 transitions, 2242 flow. Second operand 8 states and 146 transitions. [2024-06-27 17:49:35,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 231 transitions, 3107 flow [2024-06-27 17:49:35,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 231 transitions, 3055 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:35,733 INFO L231 Difference]: Finished difference. Result has 145 places, 192 transitions, 2540 flow [2024-06-27 17:49:35,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=2190, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2540, PETRI_PLACES=145, PETRI_TRANSITIONS=192} [2024-06-27 17:49:35,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-27 17:49:35,733 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 192 transitions, 2540 flow [2024-06-27 17:49:35,734 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) [2024-06-27 17:49:35,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:35,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:35,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:49:35,734 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:35,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:35,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2006179365, now seen corresponding path program 3 times [2024-06-27 17:49:35,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:35,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034543992] [2024-06-27 17:49:35,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:35,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:35,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:36,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:36,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034543992] [2024-06-27 17:49:36,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034543992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:36,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:36,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:49:36,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728043126] [2024-06-27 17:49:36,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:36,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:49:36,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:36,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:49:36,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:49:36,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:36,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 192 transitions, 2540 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) [2024-06-27 17:49:36,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:36,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:36,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:37,062 INFO L124 PetriNetUnfolderBase]: 1133/2033 cut-off events. [2024-06-27 17:49:37,062 INFO L125 PetriNetUnfolderBase]: For 21951/21951 co-relation queries the response was YES. [2024-06-27 17:49:37,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11365 conditions, 2033 events. 1133/2033 cut-off events. For 21951/21951 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11261 event pairs, 292 based on Foata normal form. 1/1961 useless extension candidates. Maximal degree in co-relation 11293. Up to 1613 conditions per place. [2024-06-27 17:49:37,079 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 157 selfloop transitions, 56 changer transitions 0/219 dead transitions. [2024-06-27 17:49:37,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 219 transitions, 3138 flow [2024-06-27 17:49:37,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:37,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:37,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 17:49:37,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45112781954887216 [2024-06-27 17:49:37,081 INFO L175 Difference]: Start difference. First operand has 145 places, 192 transitions, 2540 flow. Second operand 7 states and 120 transitions. [2024-06-27 17:49:37,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 219 transitions, 3138 flow [2024-06-27 17:49:37,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 219 transitions, 3009 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:37,122 INFO L231 Difference]: Finished difference. Result has 149 places, 194 transitions, 2571 flow [2024-06-27 17:49:37,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2571, PETRI_PLACES=149, PETRI_TRANSITIONS=194} [2024-06-27 17:49:37,122 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-27 17:49:37,123 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 194 transitions, 2571 flow [2024-06-27 17:49:37,123 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) [2024-06-27 17:49:37,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:37,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:37,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:49:37,123 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:37,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:37,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2015710284, now seen corresponding path program 5 times [2024-06-27 17:49:37,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:37,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13149313] [2024-06-27 17:49:37,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:37,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:37,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:37,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13149313] [2024-06-27 17:49:37,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13149313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:37,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:37,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:49:37,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385830131] [2024-06-27 17:49:37,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:37,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:49:37,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:37,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:49:37,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:49:37,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:37,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 194 transitions, 2571 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) [2024-06-27 17:49:37,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:37,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:37,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:38,217 INFO L124 PetriNetUnfolderBase]: 1139/2046 cut-off events. [2024-06-27 17:49:38,217 INFO L125 PetriNetUnfolderBase]: For 22405/22405 co-relation queries the response was YES. [2024-06-27 17:49:38,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11321 conditions, 2046 events. 1139/2046 cut-off events. For 22405/22405 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11362 event pairs, 485 based on Foata normal form. 2/1980 useless extension candidates. Maximal degree in co-relation 11247. Up to 1763 conditions per place. [2024-06-27 17:49:38,233 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 197 selfloop transitions, 19 changer transitions 0/222 dead transitions. [2024-06-27 17:49:38,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 222 transitions, 3154 flow [2024-06-27 17:49:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:38,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 17:49:38,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4309210526315789 [2024-06-27 17:49:38,234 INFO L175 Difference]: Start difference. First operand has 149 places, 194 transitions, 2571 flow. Second operand 8 states and 131 transitions. [2024-06-27 17:49:38,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 222 transitions, 3154 flow [2024-06-27 17:49:38,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 222 transitions, 3022 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:38,274 INFO L231 Difference]: Finished difference. Result has 152 places, 197 transitions, 2537 flow [2024-06-27 17:49:38,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=2441, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2537, PETRI_PLACES=152, PETRI_TRANSITIONS=197} [2024-06-27 17:49:38,275 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-27 17:49:38,275 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 197 transitions, 2537 flow [2024-06-27 17:49:38,275 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) [2024-06-27 17:49:38,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:38,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:38,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:49:38,276 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:38,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:38,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2015722188, now seen corresponding path program 1 times [2024-06-27 17:49:38,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:38,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740311230] [2024-06-27 17:49:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:38,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:40,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:40,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740311230] [2024-06-27 17:49:40,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740311230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:40,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:40,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:49:40,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003274415] [2024-06-27 17:49:40,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:40,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:49:40,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:40,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:49:40,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:49:40,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:40,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 197 transitions, 2537 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:40,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:40,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:40,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:40,867 INFO L124 PetriNetUnfolderBase]: 1145/2065 cut-off events. [2024-06-27 17:49:40,867 INFO L125 PetriNetUnfolderBase]: For 21879/21879 co-relation queries the response was YES. [2024-06-27 17:49:40,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11295 conditions, 2065 events. 1145/2065 cut-off events. For 21879/21879 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11558 event pairs, 480 based on Foata normal form. 1/1995 useless extension candidates. Maximal degree in co-relation 11220. Up to 1769 conditions per place. [2024-06-27 17:49:40,883 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 203 selfloop transitions, 23 changer transitions 0/232 dead transitions. [2024-06-27 17:49:40,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 232 transitions, 3184 flow [2024-06-27 17:49:40,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:49:40,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:49:40,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 17:49:40,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269005847953216 [2024-06-27 17:49:40,884 INFO L175 Difference]: Start difference. First operand has 152 places, 197 transitions, 2537 flow. Second operand 9 states and 146 transitions. [2024-06-27 17:49:40,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 232 transitions, 3184 flow [2024-06-27 17:49:40,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 232 transitions, 3116 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 17:49:40,926 INFO L231 Difference]: Finished difference. Result has 156 places, 203 transitions, 2616 flow [2024-06-27 17:49:40,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=2469, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2616, PETRI_PLACES=156, PETRI_TRANSITIONS=203} [2024-06-27 17:49:40,927 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-27 17:49:40,927 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 203 transitions, 2616 flow [2024-06-27 17:49:40,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:40,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:40,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:40,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:49:40,928 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:40,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:40,928 INFO L85 PathProgramCache]: Analyzing trace with hash -962985352, now seen corresponding path program 1 times [2024-06-27 17:49:40,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:40,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797528576] [2024-06-27 17:49:40,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:40,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:41,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:41,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797528576] [2024-06-27 17:49:41,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797528576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:41,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:41,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:49:41,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199896248] [2024-06-27 17:49:41,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:41,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:49:41,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:41,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:49:41,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:49:41,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:41,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 203 transitions, 2616 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:41,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:41,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:41,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:42,278 INFO L124 PetriNetUnfolderBase]: 1227/2186 cut-off events. [2024-06-27 17:49:42,278 INFO L125 PetriNetUnfolderBase]: For 22891/22891 co-relation queries the response was YES. [2024-06-27 17:49:42,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11897 conditions, 2186 events. 1227/2186 cut-off events. For 22891/22891 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12177 event pairs, 319 based on Foata normal form. 2/2119 useless extension candidates. Maximal degree in co-relation 11820. Up to 1783 conditions per place. [2024-06-27 17:49:42,296 INFO L140 encePairwiseOnDemand]: 24/38 looper letters, 209 selfloop transitions, 48 changer transitions 0/263 dead transitions. [2024-06-27 17:49:42,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 263 transitions, 3422 flow [2024-06-27 17:49:42,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:49:42,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:49:42,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-27 17:49:42,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44258373205741625 [2024-06-27 17:49:42,303 INFO L175 Difference]: Start difference. First operand has 156 places, 203 transitions, 2616 flow. Second operand 11 states and 185 transitions. [2024-06-27 17:49:42,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 263 transitions, 3422 flow [2024-06-27 17:49:42,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 263 transitions, 3338 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:42,352 INFO L231 Difference]: Finished difference. Result has 166 places, 226 transitions, 2840 flow [2024-06-27 17:49:42,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=2532, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2840, PETRI_PLACES=166, PETRI_TRANSITIONS=226} [2024-06-27 17:49:42,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-27 17:49:42,353 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 226 transitions, 2840 flow [2024-06-27 17:49:42,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:42,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:42,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:42,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:49:42,353 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:42,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:42,354 INFO L85 PathProgramCache]: Analyzing trace with hash 855460290, now seen corresponding path program 2 times [2024-06-27 17:49:42,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:42,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920275048] [2024-06-27 17:49:42,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:42,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:43,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:43,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920275048] [2024-06-27 17:49:43,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920275048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:43,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:43,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:49:43,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976175506] [2024-06-27 17:49:43,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:43,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:49:43,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:43,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:49:43,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:49:43,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:43,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 226 transitions, 2840 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:43,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:43,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:43,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:43,701 INFO L124 PetriNetUnfolderBase]: 1333/2345 cut-off events. [2024-06-27 17:49:43,702 INFO L125 PetriNetUnfolderBase]: For 28542/28542 co-relation queries the response was YES. [2024-06-27 17:49:43,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13876 conditions, 2345 events. 1333/2345 cut-off events. For 28542/28542 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13114 event pairs, 312 based on Foata normal form. 2/2278 useless extension candidates. Maximal degree in co-relation 13793. Up to 1911 conditions per place. [2024-06-27 17:49:43,724 INFO L140 encePairwiseOnDemand]: 24/38 looper letters, 223 selfloop transitions, 58 changer transitions 0/287 dead transitions. [2024-06-27 17:49:43,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 287 transitions, 3895 flow [2024-06-27 17:49:43,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:49:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:49:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 17:49:43,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4619883040935672 [2024-06-27 17:49:43,726 INFO L175 Difference]: Start difference. First operand has 166 places, 226 transitions, 2840 flow. Second operand 9 states and 158 transitions. [2024-06-27 17:49:43,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 287 transitions, 3895 flow [2024-06-27 17:49:43,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 287 transitions, 3712 flow, removed 74 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:43,866 INFO L231 Difference]: Finished difference. Result has 174 places, 255 transitions, 3169 flow [2024-06-27 17:49:43,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=2735, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3169, PETRI_PLACES=174, PETRI_TRANSITIONS=255} [2024-06-27 17:49:43,866 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-27 17:49:43,866 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 255 transitions, 3169 flow [2024-06-27 17:49:43,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:43,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:43,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:43,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:49:43,867 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:43,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:43,867 INFO L85 PathProgramCache]: Analyzing trace with hash 52147680, now seen corresponding path program 3 times [2024-06-27 17:49:43,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:43,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260900054] [2024-06-27 17:49:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:43,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:44,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:44,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260900054] [2024-06-27 17:49:44,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260900054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:44,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:44,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:49:44,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223661325] [2024-06-27 17:49:44,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:44,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:49:44,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:44,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:49:44,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:49:44,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:44,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 255 transitions, 3169 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:44,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:44,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:44,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:45,344 INFO L124 PetriNetUnfolderBase]: 1429/2493 cut-off events. [2024-06-27 17:49:45,344 INFO L125 PetriNetUnfolderBase]: For 31790/31790 co-relation queries the response was YES. [2024-06-27 17:49:45,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15060 conditions, 2493 events. 1429/2493 cut-off events. For 31790/31790 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14013 event pairs, 232 based on Foata normal form. 2/2425 useless extension candidates. Maximal degree in co-relation 14972. Up to 1686 conditions per place. [2024-06-27 17:49:45,363 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 185 selfloop transitions, 121 changer transitions 0/312 dead transitions. [2024-06-27 17:49:45,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 312 transitions, 4259 flow [2024-06-27 17:49:45,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:49:45,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:49:45,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 17:49:45,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4824561403508772 [2024-06-27 17:49:45,364 INFO L175 Difference]: Start difference. First operand has 174 places, 255 transitions, 3169 flow. Second operand 9 states and 165 transitions. [2024-06-27 17:49:45,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 312 transitions, 4259 flow [2024-06-27 17:49:45,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 312 transitions, 4154 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:45,426 INFO L231 Difference]: Finished difference. Result has 180 places, 275 transitions, 3559 flow [2024-06-27 17:49:45,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=3064, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3559, PETRI_PLACES=180, PETRI_TRANSITIONS=275} [2024-06-27 17:49:45,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-27 17:49:45,427 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 275 transitions, 3559 flow [2024-06-27 17:49:45,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:45,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:45,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:45,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:49:45,428 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:45,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:45,428 INFO L85 PathProgramCache]: Analyzing trace with hash 855611198, now seen corresponding path program 1 times [2024-06-27 17:49:45,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:45,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241207390] [2024-06-27 17:49:45,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:45,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:46,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:46,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241207390] [2024-06-27 17:49:46,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241207390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:46,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:46,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:49:46,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185561234] [2024-06-27 17:49:46,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:46,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:49:46,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:46,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:49:46,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:49:46,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:46,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 275 transitions, 3559 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:46,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:46,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:46,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:46,860 INFO L124 PetriNetUnfolderBase]: 1471/2592 cut-off events. [2024-06-27 17:49:46,860 INFO L125 PetriNetUnfolderBase]: For 35547/35547 co-relation queries the response was YES. [2024-06-27 17:49:46,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16165 conditions, 2592 events. 1471/2592 cut-off events. For 35547/35547 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14902 event pairs, 418 based on Foata normal form. 1/2515 useless extension candidates. Maximal degree in co-relation 16076. Up to 1970 conditions per place. [2024-06-27 17:49:46,883 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 245 selfloop transitions, 73 changer transitions 0/324 dead transitions. [2024-06-27 17:49:46,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 324 transitions, 4592 flow [2024-06-27 17:49:46,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:49:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:49:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 17:49:46,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2024-06-27 17:49:46,885 INFO L175 Difference]: Start difference. First operand has 180 places, 275 transitions, 3559 flow. Second operand 9 states and 162 transitions. [2024-06-27 17:49:46,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 324 transitions, 4592 flow [2024-06-27 17:49:46,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 324 transitions, 4462 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:46,963 INFO L231 Difference]: Finished difference. Result has 187 places, 286 transitions, 3813 flow [2024-06-27 17:49:46,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=3431, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3813, PETRI_PLACES=187, PETRI_TRANSITIONS=286} [2024-06-27 17:49:46,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-27 17:49:46,964 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 286 transitions, 3813 flow [2024-06-27 17:49:46,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:46,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:46,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:46,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:49:46,965 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:46,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:46,965 INFO L85 PathProgramCache]: Analyzing trace with hash 855604440, now seen corresponding path program 4 times [2024-06-27 17:49:46,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:46,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654500312] [2024-06-27 17:49:46,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:46,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:47,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:47,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654500312] [2024-06-27 17:49:47,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654500312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:47,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:47,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:49:47,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319017291] [2024-06-27 17:49:47,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:47,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:49:47,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:47,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:49:47,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:49:47,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:47,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 286 transitions, 3813 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:47,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:47,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:47,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:48,395 INFO L124 PetriNetUnfolderBase]: 1481/2594 cut-off events. [2024-06-27 17:49:48,395 INFO L125 PetriNetUnfolderBase]: For 37572/37572 co-relation queries the response was YES. [2024-06-27 17:49:48,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16457 conditions, 2594 events. 1481/2594 cut-off events. For 37572/37572 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14851 event pairs, 243 based on Foata normal form. 2/2520 useless extension candidates. Maximal degree in co-relation 16366. Up to 1914 conditions per place. [2024-06-27 17:49:48,417 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 219 selfloop transitions, 99 changer transitions 0/324 dead transitions. [2024-06-27 17:49:48,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 324 transitions, 4741 flow [2024-06-27 17:49:48,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:49:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:49:48,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 17:49:48,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2024-06-27 17:49:48,419 INFO L175 Difference]: Start difference. First operand has 187 places, 286 transitions, 3813 flow. Second operand 9 states and 162 transitions. [2024-06-27 17:49:48,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 324 transitions, 4741 flow [2024-06-27 17:49:48,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 324 transitions, 4664 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:48,507 INFO L231 Difference]: Finished difference. Result has 194 places, 289 transitions, 4004 flow [2024-06-27 17:49:48,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=3736, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4004, PETRI_PLACES=194, PETRI_TRANSITIONS=289} [2024-06-27 17:49:48,508 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-27 17:49:48,508 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 289 transitions, 4004 flow [2024-06-27 17:49:48,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:48,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:48,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:48,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:49:48,509 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:48,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:48,509 INFO L85 PathProgramCache]: Analyzing trace with hash 479329274, now seen corresponding path program 1 times [2024-06-27 17:49:48,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:48,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230293099] [2024-06-27 17:49:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:48,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:49,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:49,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230293099] [2024-06-27 17:49:49,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230293099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:49,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:49,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:49:49,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092865993] [2024-06-27 17:49:49,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:49,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:49:49,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:49,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:49:49,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:49:49,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:49,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 289 transitions, 4004 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:49,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:49,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:49,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:50,164 INFO L124 PetriNetUnfolderBase]: 1513/2669 cut-off events. [2024-06-27 17:49:50,164 INFO L125 PetriNetUnfolderBase]: For 40644/40644 co-relation queries the response was YES. [2024-06-27 17:49:50,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17064 conditions, 2669 events. 1513/2669 cut-off events. For 40644/40644 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15586 event pairs, 331 based on Foata normal form. 2/2587 useless extension candidates. Maximal degree in co-relation 16971. Up to 2045 conditions per place. [2024-06-27 17:49:50,190 INFO L140 encePairwiseOnDemand]: 23/38 looper letters, 245 selfloop transitions, 81 changer transitions 0/332 dead transitions. [2024-06-27 17:49:50,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 332 transitions, 4950 flow [2024-06-27 17:49:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:49:50,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:49:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 17:49:50,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45789473684210524 [2024-06-27 17:49:50,192 INFO L175 Difference]: Start difference. First operand has 194 places, 289 transitions, 4004 flow. Second operand 10 states and 174 transitions. [2024-06-27 17:49:50,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 332 transitions, 4950 flow [2024-06-27 17:49:50,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 332 transitions, 4714 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 17:49:50,286 INFO L231 Difference]: Finished difference. Result has 199 places, 293 transitions, 4001 flow [2024-06-27 17:49:50,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=3768, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4001, PETRI_PLACES=199, PETRI_TRANSITIONS=293} [2024-06-27 17:49:50,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-27 17:49:50,288 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 293 transitions, 4001 flow [2024-06-27 17:49:50,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:50,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:50,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:50,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:49:50,288 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:50,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:50,289 INFO L85 PathProgramCache]: Analyzing trace with hash -188258908, now seen corresponding path program 5 times [2024-06-27 17:49:50,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:50,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146119450] [2024-06-27 17:49:50,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:50,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:50,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:50,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146119450] [2024-06-27 17:49:50,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146119450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:50,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:50,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:49:50,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324987066] [2024-06-27 17:49:50,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:50,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:49:50,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:50,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:49:50,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:49:51,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:51,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 293 transitions, 4001 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:51,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:51,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:51,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:51,713 INFO L124 PetriNetUnfolderBase]: 1533/2690 cut-off events. [2024-06-27 17:49:51,713 INFO L125 PetriNetUnfolderBase]: For 41258/41258 co-relation queries the response was YES. [2024-06-27 17:49:51,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17340 conditions, 2690 events. 1533/2690 cut-off events. For 41258/41258 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15536 event pairs, 345 based on Foata normal form. 2/2613 useless extension candidates. Maximal degree in co-relation 17245. Up to 2134 conditions per place. [2024-06-27 17:49:51,736 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 243 selfloop transitions, 74 changer transitions 0/323 dead transitions. [2024-06-27 17:49:51,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 323 transitions, 4865 flow [2024-06-27 17:49:51,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:51,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:51,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 17:49:51,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45723684210526316 [2024-06-27 17:49:51,737 INFO L175 Difference]: Start difference. First operand has 199 places, 293 transitions, 4001 flow. Second operand 8 states and 139 transitions. [2024-06-27 17:49:51,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 323 transitions, 4865 flow [2024-06-27 17:49:51,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 323 transitions, 4694 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 17:49:51,828 INFO L231 Difference]: Finished difference. Result has 200 places, 296 transitions, 4074 flow [2024-06-27 17:49:51,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=3830, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4074, PETRI_PLACES=200, PETRI_TRANSITIONS=296} [2024-06-27 17:49:51,829 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-27 17:49:51,829 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 296 transitions, 4074 flow [2024-06-27 17:49:51,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:51,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:51,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:51,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:49:51,829 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:51,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:51,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1031196446, now seen corresponding path program 2 times [2024-06-27 17:49:51,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:51,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66498590] [2024-06-27 17:49:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:51,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:52,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:52,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66498590] [2024-06-27 17:49:52,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66498590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:52,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:52,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:49:52,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29061550] [2024-06-27 17:49:52,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:52,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:49:52,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:52,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:49:52,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:49:52,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:52,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 296 transitions, 4074 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:52,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:52,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:52,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:53,379 INFO L124 PetriNetUnfolderBase]: 1569/2775 cut-off events. [2024-06-27 17:49:53,380 INFO L125 PetriNetUnfolderBase]: For 44341/44341 co-relation queries the response was YES. [2024-06-27 17:49:53,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18097 conditions, 2775 events. 1569/2775 cut-off events. For 44341/44341 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16306 event pairs, 417 based on Foata normal form. 1/2688 useless extension candidates. Maximal degree in co-relation 18001. Up to 2008 conditions per place. [2024-06-27 17:49:53,405 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 244 selfloop transitions, 89 changer transitions 0/339 dead transitions. [2024-06-27 17:49:53,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 339 transitions, 5134 flow [2024-06-27 17:49:53,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:53,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:53,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 17:49:53,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47039473684210525 [2024-06-27 17:49:53,407 INFO L175 Difference]: Start difference. First operand has 200 places, 296 transitions, 4074 flow. Second operand 8 states and 143 transitions. [2024-06-27 17:49:53,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 339 transitions, 5134 flow [2024-06-27 17:49:53,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 339 transitions, 4958 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 17:49:53,513 INFO L231 Difference]: Finished difference. Result has 203 places, 305 transitions, 4315 flow [2024-06-27 17:49:53,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=3898, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4315, PETRI_PLACES=203, PETRI_TRANSITIONS=305} [2024-06-27 17:49:53,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-27 17:49:53,514 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 305 transitions, 4315 flow [2024-06-27 17:49:53,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:53,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:53,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:53,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:49:53,515 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:53,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:53,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1031189688, now seen corresponding path program 6 times [2024-06-27 17:49:53,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:53,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723336082] [2024-06-27 17:49:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:53,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:54,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:54,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723336082] [2024-06-27 17:49:54,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723336082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:54,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:54,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:49:54,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628536477] [2024-06-27 17:49:54,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:54,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:49:54,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:54,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:49:54,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:49:54,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:54,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 305 transitions, 4315 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:54,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:54,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:54,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:54,850 INFO L124 PetriNetUnfolderBase]: 1621/2845 cut-off events. [2024-06-27 17:49:54,850 INFO L125 PetriNetUnfolderBase]: For 48850/48850 co-relation queries the response was YES. [2024-06-27 17:49:54,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18928 conditions, 2845 events. 1621/2845 cut-off events. For 48850/48850 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 16726 event pairs, 264 based on Foata normal form. 2/2760 useless extension candidates. Maximal degree in co-relation 18830. Up to 2081 conditions per place. [2024-06-27 17:49:54,877 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 238 selfloop transitions, 103 changer transitions 0/347 dead transitions. [2024-06-27 17:49:54,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 347 transitions, 5363 flow [2024-06-27 17:49:54,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:54,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:54,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 17:49:54,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46710526315789475 [2024-06-27 17:49:54,880 INFO L175 Difference]: Start difference. First operand has 203 places, 305 transitions, 4315 flow. Second operand 8 states and 142 transitions. [2024-06-27 17:49:54,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 347 transitions, 5363 flow [2024-06-27 17:49:54,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 347 transitions, 5282 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:55,001 INFO L231 Difference]: Finished difference. Result has 209 places, 314 transitions, 4576 flow [2024-06-27 17:49:55,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4236, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4576, PETRI_PLACES=209, PETRI_TRANSITIONS=314} [2024-06-27 17:49:55,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-27 17:49:55,001 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 314 transitions, 4576 flow [2024-06-27 17:49:55,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:55,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:55,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:55,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:49:55,002 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:55,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:55,002 INFO L85 PathProgramCache]: Analyzing trace with hash -425628076, now seen corresponding path program 7 times [2024-06-27 17:49:55,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:55,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482844901] [2024-06-27 17:49:55,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:55,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:55,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:55,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482844901] [2024-06-27 17:49:55,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482844901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:55,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:55,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:49:55,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076333214] [2024-06-27 17:49:55,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:55,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:49:55,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:55,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:49:55,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:49:55,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:55,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 314 transitions, 4576 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:55,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:55,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:55,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:56,554 INFO L124 PetriNetUnfolderBase]: 1655/2899 cut-off events. [2024-06-27 17:49:56,554 INFO L125 PetriNetUnfolderBase]: For 53938/53938 co-relation queries the response was YES. [2024-06-27 17:49:56,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19938 conditions, 2899 events. 1655/2899 cut-off events. For 53938/53938 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17073 event pairs, 232 based on Foata normal form. 2/2813 useless extension candidates. Maximal degree in co-relation 19838. Up to 1883 conditions per place. [2024-06-27 17:49:56,582 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 207 selfloop transitions, 141 changer transitions 0/354 dead transitions. [2024-06-27 17:49:56,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 354 transitions, 5746 flow [2024-06-27 17:49:56,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:56,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:56,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 17:49:56,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4769736842105263 [2024-06-27 17:49:56,592 INFO L175 Difference]: Start difference. First operand has 209 places, 314 transitions, 4576 flow. Second operand 8 states and 145 transitions. [2024-06-27 17:49:56,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 354 transitions, 5746 flow [2024-06-27 17:49:56,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 354 transitions, 5536 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:56,717 INFO L231 Difference]: Finished difference. Result has 213 places, 320 transitions, 4836 flow [2024-06-27 17:49:56,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4366, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4836, PETRI_PLACES=213, PETRI_TRANSITIONS=320} [2024-06-27 17:49:56,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-27 17:49:56,718 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 320 transitions, 4836 flow [2024-06-27 17:49:56,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:56,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:56,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:56,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:49:56,718 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:56,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:56,719 INFO L85 PathProgramCache]: Analyzing trace with hash -420026128, now seen corresponding path program 2 times [2024-06-27 17:49:56,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:56,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246673868] [2024-06-27 17:49:56,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:56,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:57,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:57,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246673868] [2024-06-27 17:49:57,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246673868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:57,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:57,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:49:57,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308837567] [2024-06-27 17:49:57,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:57,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:49:57,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:57,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:49:57,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:49:57,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:57,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 320 transitions, 4836 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:57,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:57,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:57,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:58,517 INFO L124 PetriNetUnfolderBase]: 1693/2972 cut-off events. [2024-06-27 17:49:58,518 INFO L125 PetriNetUnfolderBase]: For 59422/59422 co-relation queries the response was YES. [2024-06-27 17:49:58,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20596 conditions, 2972 events. 1693/2972 cut-off events. For 59422/59422 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17757 event pairs, 329 based on Foata normal form. 2/2882 useless extension candidates. Maximal degree in co-relation 20495. Up to 2216 conditions per place. [2024-06-27 17:49:58,543 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 263 selfloop transitions, 95 changer transitions 0/364 dead transitions. [2024-06-27 17:49:58,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 364 transitions, 5890 flow [2024-06-27 17:49:58,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:49:58,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:49:58,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 17:49:58,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678362573099415 [2024-06-27 17:49:58,545 INFO L175 Difference]: Start difference. First operand has 213 places, 320 transitions, 4836 flow. Second operand 9 states and 160 transitions. [2024-06-27 17:49:58,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 364 transitions, 5890 flow [2024-06-27 17:49:58,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 364 transitions, 5692 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:58,673 INFO L231 Difference]: Finished difference. Result has 218 places, 327 transitions, 4984 flow [2024-06-27 17:49:58,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4638, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4984, PETRI_PLACES=218, PETRI_TRANSITIONS=327} [2024-06-27 17:49:58,674 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-27 17:49:58,674 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 327 transitions, 4984 flow [2024-06-27 17:49:58,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:58,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:58,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:58,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:49:58,674 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:58,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:58,675 INFO L85 PathProgramCache]: Analyzing trace with hash 2072950608, now seen corresponding path program 8 times [2024-06-27 17:49:58,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:58,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750528884] [2024-06-27 17:49:58,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:58,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:59,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:59,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750528884] [2024-06-27 17:49:59,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750528884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:59,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:59,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:49:59,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129141141] [2024-06-27 17:49:59,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:59,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:49:59,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:59,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:49:59,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:49:59,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:49:59,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 327 transitions, 4984 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:59,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:59,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:49:59,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:00,140 INFO L124 PetriNetUnfolderBase]: 1737/3029 cut-off events. [2024-06-27 17:50:00,141 INFO L125 PetriNetUnfolderBase]: For 62304/62304 co-relation queries the response was YES. [2024-06-27 17:50:00,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21663 conditions, 3029 events. 1737/3029 cut-off events. For 62304/62304 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17944 event pairs, 288 based on Foata normal form. 2/2936 useless extension candidates. Maximal degree in co-relation 21560. Up to 2220 conditions per place. [2024-06-27 17:50:00,170 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 257 selfloop transitions, 104 changer transitions 0/367 dead transitions. [2024-06-27 17:50:00,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 367 transitions, 6214 flow [2024-06-27 17:50:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:00,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:00,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 17:50:00,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4769736842105263 [2024-06-27 17:50:00,172 INFO L175 Difference]: Start difference. First operand has 218 places, 327 transitions, 4984 flow. Second operand 8 states and 145 transitions. [2024-06-27 17:50:00,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 367 transitions, 6214 flow [2024-06-27 17:50:00,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 367 transitions, 5974 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:00,321 INFO L231 Difference]: Finished difference. Result has 220 places, 333 transitions, 5149 flow [2024-06-27 17:50:00,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4744, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5149, PETRI_PLACES=220, PETRI_TRANSITIONS=333} [2024-06-27 17:50:00,322 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-27 17:50:00,322 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 333 transitions, 5149 flow [2024-06-27 17:50:00,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:00,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:00,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:00,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:50:00,323 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:00,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:00,323 INFO L85 PathProgramCache]: Analyzing trace with hash 640525036, now seen corresponding path program 3 times [2024-06-27 17:50:00,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:00,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592103716] [2024-06-27 17:50:00,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:00,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:00,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:00,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592103716] [2024-06-27 17:50:00,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592103716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:00,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:00,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:00,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14601671] [2024-06-27 17:50:00,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:00,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:00,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:00,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:00,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:00,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:00,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 333 transitions, 5149 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:00,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:00,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:00,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:01,695 INFO L124 PetriNetUnfolderBase]: 1823/3184 cut-off events. [2024-06-27 17:50:01,695 INFO L125 PetriNetUnfolderBase]: For 69315/69315 co-relation queries the response was YES. [2024-06-27 17:50:01,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22765 conditions, 3184 events. 1823/3184 cut-off events. For 69315/69315 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19215 event pairs, 294 based on Foata normal form. 2/3087 useless extension candidates. Maximal degree in co-relation 22661. Up to 1728 conditions per place. [2024-06-27 17:50:01,727 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 263 selfloop transitions, 120 changer transitions 0/389 dead transitions. [2024-06-27 17:50:01,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 389 transitions, 6613 flow [2024-06-27 17:50:01,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:01,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:01,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 17:50:01,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4853801169590643 [2024-06-27 17:50:01,729 INFO L175 Difference]: Start difference. First operand has 220 places, 333 transitions, 5149 flow. Second operand 9 states and 166 transitions. [2024-06-27 17:50:01,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 389 transitions, 6613 flow [2024-06-27 17:50:01,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 389 transitions, 6367 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:01,910 INFO L231 Difference]: Finished difference. Result has 228 places, 346 transitions, 5501 flow [2024-06-27 17:50:01,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4903, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5501, PETRI_PLACES=228, PETRI_TRANSITIONS=346} [2024-06-27 17:50:01,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-27 17:50:01,911 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 346 transitions, 5501 flow [2024-06-27 17:50:01,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:01,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:01,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:01,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:50:01,912 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:01,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:01,912 INFO L85 PathProgramCache]: Analyzing trace with hash 631953846, now seen corresponding path program 3 times [2024-06-27 17:50:01,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:01,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309777237] [2024-06-27 17:50:01,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:01,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:02,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:02,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309777237] [2024-06-27 17:50:02,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309777237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:02,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:02,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:02,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417950263] [2024-06-27 17:50:02,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:02,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:02,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:02,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:02,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:02,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:02,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 346 transitions, 5501 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:02,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:02,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:02,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:03,422 INFO L124 PetriNetUnfolderBase]: 1836/3169 cut-off events. [2024-06-27 17:50:03,422 INFO L125 PetriNetUnfolderBase]: For 72489/72489 co-relation queries the response was YES. [2024-06-27 17:50:03,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23872 conditions, 3169 events. 1836/3169 cut-off events. For 72489/72489 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18900 event pairs, 396 based on Foata normal form. 1/3083 useless extension candidates. Maximal degree in co-relation 23763. Up to 2559 conditions per place. [2024-06-27 17:50:03,458 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 306 selfloop transitions, 81 changer transitions 0/393 dead transitions. [2024-06-27 17:50:03,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 393 transitions, 6872 flow [2024-06-27 17:50:03,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:03,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:03,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 17:50:03,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46381578947368424 [2024-06-27 17:50:03,459 INFO L175 Difference]: Start difference. First operand has 228 places, 346 transitions, 5501 flow. Second operand 8 states and 141 transitions. [2024-06-27 17:50:03,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 393 transitions, 6872 flow [2024-06-27 17:50:03,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 393 transitions, 6692 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:03,672 INFO L231 Difference]: Finished difference. Result has 235 places, 361 transitions, 5927 flow [2024-06-27 17:50:03,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5341, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5927, PETRI_PLACES=235, PETRI_TRANSITIONS=361} [2024-06-27 17:50:03,672 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-27 17:50:03,673 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 361 transitions, 5927 flow [2024-06-27 17:50:03,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:03,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:03,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:03,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:50:03,673 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:03,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:03,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1937133536, now seen corresponding path program 4 times [2024-06-27 17:50:03,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:03,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396926445] [2024-06-27 17:50:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:03,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:04,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:04,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396926445] [2024-06-27 17:50:04,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396926445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:04,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:04,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:04,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256127293] [2024-06-27 17:50:04,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:04,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:04,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:04,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:04,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:04,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:04,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 361 transitions, 5927 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:04,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:04,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:04,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:05,585 INFO L124 PetriNetUnfolderBase]: 1881/3254 cut-off events. [2024-06-27 17:50:05,585 INFO L125 PetriNetUnfolderBase]: For 80080/80080 co-relation queries the response was YES. [2024-06-27 17:50:05,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24743 conditions, 3254 events. 1881/3254 cut-off events. For 80080/80080 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19515 event pairs, 618 based on Foata normal form. 4/3170 useless extension candidates. Maximal degree in co-relation 24630. Up to 2809 conditions per place. [2024-06-27 17:50:05,622 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 369 selfloop transitions, 32 changer transitions 0/407 dead transitions. [2024-06-27 17:50:05,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 407 transitions, 7221 flow [2024-06-27 17:50:05,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:50:05,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:50:05,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 17:50:05,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44473684210526315 [2024-06-27 17:50:05,632 INFO L175 Difference]: Start difference. First operand has 235 places, 361 transitions, 5927 flow. Second operand 10 states and 169 transitions. [2024-06-27 17:50:05,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 407 transitions, 7221 flow [2024-06-27 17:50:05,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 407 transitions, 7022 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:05,886 INFO L231 Difference]: Finished difference. Result has 244 places, 370 transitions, 6018 flow [2024-06-27 17:50:05,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5736, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6018, PETRI_PLACES=244, PETRI_TRANSITIONS=370} [2024-06-27 17:50:05,887 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-27 17:50:05,887 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 370 transitions, 6018 flow [2024-06-27 17:50:05,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:05,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:05,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:05,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:50:05,888 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:05,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:05,888 INFO L85 PathProgramCache]: Analyzing trace with hash 640227808, now seen corresponding path program 9 times [2024-06-27 17:50:05,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:05,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027088596] [2024-06-27 17:50:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:05,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:06,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:06,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027088596] [2024-06-27 17:50:06,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027088596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:06,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:06,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:06,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332090905] [2024-06-27 17:50:06,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:06,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:06,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:06,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:06,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:06,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:06,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 370 transitions, 6018 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:06,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:06,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:06,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:07,449 INFO L124 PetriNetUnfolderBase]: 1877/3236 cut-off events. [2024-06-27 17:50:07,449 INFO L125 PetriNetUnfolderBase]: For 76047/76047 co-relation queries the response was YES. [2024-06-27 17:50:07,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24581 conditions, 3236 events. 1877/3236 cut-off events. For 76047/76047 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19372 event pairs, 238 based on Foata normal form. 2/3146 useless extension candidates. Maximal degree in co-relation 24465. Up to 2088 conditions per place. [2024-06-27 17:50:07,487 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 239 selfloop transitions, 162 changer transitions 0/407 dead transitions. [2024-06-27 17:50:07,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 407 transitions, 7263 flow [2024-06-27 17:50:07,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:07,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:07,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 17:50:07,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590643274853801 [2024-06-27 17:50:07,489 INFO L175 Difference]: Start difference. First operand has 244 places, 370 transitions, 6018 flow. Second operand 9 states and 157 transitions. [2024-06-27 17:50:07,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 407 transitions, 7263 flow [2024-06-27 17:50:07,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 407 transitions, 7131 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:07,734 INFO L231 Difference]: Finished difference. Result has 247 places, 374 transitions, 6343 flow [2024-06-27 17:50:07,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5888, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6343, PETRI_PLACES=247, PETRI_TRANSITIONS=374} [2024-06-27 17:50:07,734 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-27 17:50:07,735 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 374 transitions, 6343 flow [2024-06-27 17:50:07,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:07,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:07,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:07,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:50:07,735 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:07,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:07,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2062012292, now seen corresponding path program 10 times [2024-06-27 17:50:07,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:07,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239083314] [2024-06-27 17:50:07,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:07,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:08,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:08,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239083314] [2024-06-27 17:50:08,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239083314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:08,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:08,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:08,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124824335] [2024-06-27 17:50:08,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:08,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:08,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:08,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:08,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:08,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:08,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 374 transitions, 6343 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:08,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:08,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:08,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:09,220 INFO L124 PetriNetUnfolderBase]: 1873/3229 cut-off events. [2024-06-27 17:50:09,221 INFO L125 PetriNetUnfolderBase]: For 77268/77268 co-relation queries the response was YES. [2024-06-27 17:50:09,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24970 conditions, 3229 events. 1873/3229 cut-off events. For 77268/77268 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 19242 event pairs, 335 based on Foata normal form. 2/3140 useless extension candidates. Maximal degree in co-relation 24853. Up to 2492 conditions per place. [2024-06-27 17:50:09,257 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 294 selfloop transitions, 103 changer transitions 0/403 dead transitions. [2024-06-27 17:50:09,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 403 transitions, 7363 flow [2024-06-27 17:50:09,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 17:50:09,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4605263157894737 [2024-06-27 17:50:09,259 INFO L175 Difference]: Start difference. First operand has 247 places, 374 transitions, 6343 flow. Second operand 8 states and 140 transitions. [2024-06-27 17:50:09,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 403 transitions, 7363 flow [2024-06-27 17:50:09,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 403 transitions, 6922 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:09,490 INFO L231 Difference]: Finished difference. Result has 250 places, 374 transitions, 6115 flow [2024-06-27 17:50:09,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5902, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6115, PETRI_PLACES=250, PETRI_TRANSITIONS=374} [2024-06-27 17:50:09,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-27 17:50:09,491 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 374 transitions, 6115 flow [2024-06-27 17:50:09,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:09,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:09,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:09,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:50:09,491 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:09,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:09,492 INFO L85 PathProgramCache]: Analyzing trace with hash 2062258370, now seen corresponding path program 5 times [2024-06-27 17:50:09,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:09,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066234475] [2024-06-27 17:50:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:09,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:10,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:10,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066234475] [2024-06-27 17:50:10,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066234475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:10,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:10,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:10,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965786188] [2024-06-27 17:50:10,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:10,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:10,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:10,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:10,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:10,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:10,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 374 transitions, 6115 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:10,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:10,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:10,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:11,284 INFO L124 PetriNetUnfolderBase]: 1905/3287 cut-off events. [2024-06-27 17:50:11,284 INFO L125 PetriNetUnfolderBase]: For 78274/78274 co-relation queries the response was YES. [2024-06-27 17:50:11,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24793 conditions, 3287 events. 1905/3287 cut-off events. For 78274/78274 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19804 event pairs, 414 based on Foata normal form. 2/3199 useless extension candidates. Maximal degree in co-relation 24674. Up to 2654 conditions per place. [2024-06-27 17:50:11,322 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 330 selfloop transitions, 79 changer transitions 0/415 dead transitions. [2024-06-27 17:50:11,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 415 transitions, 7309 flow [2024-06-27 17:50:11,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:11,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 17:50:11,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590643274853801 [2024-06-27 17:50:11,323 INFO L175 Difference]: Start difference. First operand has 250 places, 374 transitions, 6115 flow. Second operand 9 states and 157 transitions. [2024-06-27 17:50:11,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 415 transitions, 7309 flow [2024-06-27 17:50:11,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 415 transitions, 7052 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 17:50:11,535 INFO L231 Difference]: Finished difference. Result has 252 places, 379 transitions, 6177 flow [2024-06-27 17:50:11,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5858, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6177, PETRI_PLACES=252, PETRI_TRANSITIONS=379} [2024-06-27 17:50:11,535 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-27 17:50:11,536 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 379 transitions, 6177 flow [2024-06-27 17:50:11,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:11,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:11,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:11,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:50:11,537 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:11,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:11,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1947609056, now seen corresponding path program 6 times [2024-06-27 17:50:11,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:11,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958478553] [2024-06-27 17:50:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:11,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:12,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:12,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958478553] [2024-06-27 17:50:12,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958478553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:12,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:12,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:12,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958506720] [2024-06-27 17:50:12,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:12,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:12,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:12,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:12,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:12,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:12,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 379 transitions, 6177 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:12,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:12,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:12,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:13,622 INFO L124 PetriNetUnfolderBase]: 1927/3346 cut-off events. [2024-06-27 17:50:13,622 INFO L125 PetriNetUnfolderBase]: For 81434/81434 co-relation queries the response was YES. [2024-06-27 17:50:13,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25173 conditions, 3346 events. 1927/3346 cut-off events. For 81434/81434 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 20261 event pairs, 381 based on Foata normal form. 2/3250 useless extension candidates. Maximal degree in co-relation 25052. Up to 1776 conditions per place. [2024-06-27 17:50:13,653 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 291 selfloop transitions, 129 changer transitions 0/426 dead transitions. [2024-06-27 17:50:13,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 426 transitions, 7623 flow [2024-06-27 17:50:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:13,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 17:50:13,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4853801169590643 [2024-06-27 17:50:13,654 INFO L175 Difference]: Start difference. First operand has 252 places, 379 transitions, 6177 flow. Second operand 9 states and 166 transitions. [2024-06-27 17:50:13,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 426 transitions, 7623 flow [2024-06-27 17:50:13,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 426 transitions, 7366 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:13,894 INFO L231 Difference]: Finished difference. Result has 256 places, 384 transitions, 6345 flow [2024-06-27 17:50:13,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5920, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6345, PETRI_PLACES=256, PETRI_TRANSITIONS=384} [2024-06-27 17:50:13,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-27 17:50:13,895 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 384 transitions, 6345 flow [2024-06-27 17:50:13,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:13,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:13,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:13,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:50:13,895 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:13,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:13,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1937120640, now seen corresponding path program 1 times [2024-06-27 17:50:13,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:13,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671778121] [2024-06-27 17:50:13,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:13,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:14,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:14,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671778121] [2024-06-27 17:50:14,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671778121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:14,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:14,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:14,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568403127] [2024-06-27 17:50:14,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:15,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:15,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:15,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:15,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:15,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:15,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 384 transitions, 6345 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:15,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:15,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:15,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:16,158 INFO L124 PetriNetUnfolderBase]: 1931/3356 cut-off events. [2024-06-27 17:50:16,158 INFO L125 PetriNetUnfolderBase]: For 85649/85649 co-relation queries the response was YES. [2024-06-27 17:50:16,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25495 conditions, 3356 events. 1931/3356 cut-off events. For 85649/85649 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 20335 event pairs, 661 based on Foata normal form. 2/3263 useless extension candidates. Maximal degree in co-relation 25372. Up to 2944 conditions per place. [2024-06-27 17:50:16,195 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 389 selfloop transitions, 26 changer transitions 0/421 dead transitions. [2024-06-27 17:50:16,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 421 transitions, 7468 flow [2024-06-27 17:50:16,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:50:16,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:50:16,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 17:50:16,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263157894736842 [2024-06-27 17:50:16,196 INFO L175 Difference]: Start difference. First operand has 256 places, 384 transitions, 6345 flow. Second operand 10 states and 162 transitions. [2024-06-27 17:50:16,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 421 transitions, 7468 flow [2024-06-27 17:50:16,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 421 transitions, 7173 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:16,404 INFO L231 Difference]: Finished difference. Result has 261 places, 385 transitions, 6127 flow [2024-06-27 17:50:16,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=6050, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6127, PETRI_PLACES=261, PETRI_TRANSITIONS=385} [2024-06-27 17:50:16,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-27 17:50:16,404 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 385 transitions, 6127 flow [2024-06-27 17:50:16,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:16,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:16,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:16,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 17:50:16,405 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:16,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:16,405 INFO L85 PathProgramCache]: Analyzing trace with hash 846528749, now seen corresponding path program 1 times [2024-06-27 17:50:16,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:16,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816448616] [2024-06-27 17:50:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:16,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:16,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:16,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816448616] [2024-06-27 17:50:16,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816448616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:16,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:16,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:50:16,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412385412] [2024-06-27 17:50:16,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:16,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:50:16,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:16,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:50:16,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:50:16,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 38 [2024-06-27 17:50:16,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 385 transitions, 6127 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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) [2024-06-27 17:50:16,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:16,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 38 [2024-06-27 17:50:16,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:16,830 INFO L124 PetriNetUnfolderBase]: 983/1767 cut-off events. [2024-06-27 17:50:16,830 INFO L125 PetriNetUnfolderBase]: For 48396/48445 co-relation queries the response was YES. [2024-06-27 17:50:16,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12565 conditions, 1767 events. 983/1767 cut-off events. For 48396/48445 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9722 event pairs, 311 based on Foata normal form. 163/1818 useless extension candidates. Maximal degree in co-relation 12442. Up to 796 conditions per place. [2024-06-27 17:50:16,844 INFO L140 encePairwiseOnDemand]: 33/38 looper letters, 121 selfloop transitions, 40 changer transitions 0/235 dead transitions. [2024-06-27 17:50:16,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 235 transitions, 4044 flow [2024-06-27 17:50:16,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:50:16,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:50:16,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-27 17:50:16,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6710526315789473 [2024-06-27 17:50:16,845 INFO L175 Difference]: Start difference. First operand has 261 places, 385 transitions, 6127 flow. Second operand 4 states and 102 transitions. [2024-06-27 17:50:16,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 235 transitions, 4044 flow [2024-06-27 17:50:16,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 235 transitions, 3252 flow, removed 41 selfloop flow, removed 65 redundant places. [2024-06-27 17:50:16,945 INFO L231 Difference]: Finished difference. Result has 201 places, 218 transitions, 2942 flow [2024-06-27 17:50:16,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=2744, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2942, PETRI_PLACES=201, PETRI_TRANSITIONS=218} [2024-06-27 17:50:16,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-27 17:50:16,945 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 218 transitions, 2942 flow [2024-06-27 17:50:16,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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) [2024-06-27 17:50:16,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:16,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:16,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 17:50:16,946 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:16,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:16,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1778392637, now seen corresponding path program 1 times [2024-06-27 17:50:16,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:16,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387742563] [2024-06-27 17:50:16,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:16,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:17,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:17,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387742563] [2024-06-27 17:50:17,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387742563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:17,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:17,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:17,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53298552] [2024-06-27 17:50:17,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:17,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:17,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:17,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:17,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:17,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-06-27 17:50:17,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 218 transitions, 2942 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:17,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:17,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-06-27 17:50:17,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:17,726 INFO L124 PetriNetUnfolderBase]: 975/1761 cut-off events. [2024-06-27 17:50:17,727 INFO L125 PetriNetUnfolderBase]: For 43311/43321 co-relation queries the response was YES. [2024-06-27 17:50:17,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12182 conditions, 1761 events. 975/1761 cut-off events. For 43311/43321 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9340 event pairs, 173 based on Foata normal form. 9/1686 useless extension candidates. Maximal degree in co-relation 12087. Up to 1318 conditions per place. [2024-06-27 17:50:17,742 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 160 selfloop transitions, 79 changer transitions 0/254 dead transitions. [2024-06-27 17:50:17,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 254 transitions, 3825 flow [2024-06-27 17:50:17,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:17,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:17,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 17:50:17,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2024-06-27 17:50:17,744 INFO L175 Difference]: Start difference. First operand has 201 places, 218 transitions, 2942 flow. Second operand 7 states and 126 transitions. [2024-06-27 17:50:17,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 254 transitions, 3825 flow [2024-06-27 17:50:17,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 254 transitions, 3785 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:17,832 INFO L231 Difference]: Finished difference. Result has 207 places, 233 transitions, 3345 flow [2024-06-27 17:50:17,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=2902, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3345, PETRI_PLACES=207, PETRI_TRANSITIONS=233} [2024-06-27 17:50:17,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-27 17:50:17,833 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 233 transitions, 3345 flow [2024-06-27 17:50:17,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:17,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:17,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:17,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 17:50:17,834 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:17,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:17,834 INFO L85 PathProgramCache]: Analyzing trace with hash -188425189, now seen corresponding path program 2 times [2024-06-27 17:50:17,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:17,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387806321] [2024-06-27 17:50:17,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:17,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:18,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:18,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387806321] [2024-06-27 17:50:18,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387806321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:18,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:18,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:18,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808664235] [2024-06-27 17:50:18,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:18,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:18,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:18,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:18,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:18,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-06-27 17:50:18,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 233 transitions, 3345 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:18,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:18,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-06-27 17:50:18,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:18,798 INFO L124 PetriNetUnfolderBase]: 1000/1805 cut-off events. [2024-06-27 17:50:18,799 INFO L125 PetriNetUnfolderBase]: For 48075/48083 co-relation queries the response was YES. [2024-06-27 17:50:18,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13028 conditions, 1805 events. 1000/1805 cut-off events. For 48075/48083 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9569 event pairs, 206 based on Foata normal form. 10/1732 useless extension candidates. Maximal degree in co-relation 12929. Up to 1391 conditions per place. [2024-06-27 17:50:18,813 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 161 selfloop transitions, 82 changer transitions 0/258 dead transitions. [2024-06-27 17:50:18,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 258 transitions, 4105 flow [2024-06-27 17:50:18,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 17:50:18,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.462406015037594 [2024-06-27 17:50:18,814 INFO L175 Difference]: Start difference. First operand has 207 places, 233 transitions, 3345 flow. Second operand 7 states and 123 transitions. [2024-06-27 17:50:18,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 258 transitions, 4105 flow [2024-06-27 17:50:18,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 258 transitions, 3949 flow, removed 77 selfloop flow, removed 1 redundant places. [2024-06-27 17:50:18,915 INFO L231 Difference]: Finished difference. Result has 214 places, 241 transitions, 3578 flow [2024-06-27 17:50:18,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=3241, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3578, PETRI_PLACES=214, PETRI_TRANSITIONS=241} [2024-06-27 17:50:18,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-27 17:50:18,916 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 241 transitions, 3578 flow [2024-06-27 17:50:18,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:18,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:18,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:18,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 17:50:18,916 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:18,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:18,917 INFO L85 PathProgramCache]: Analyzing trace with hash -916102089, now seen corresponding path program 1 times [2024-06-27 17:50:18,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:18,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049764540] [2024-06-27 17:50:18,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:18,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:19,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:19,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049764540] [2024-06-27 17:50:19,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049764540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:19,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:19,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:19,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467412625] [2024-06-27 17:50:19,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:19,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:19,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:19,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:19,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:19,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:19,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 241 transitions, 3578 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:19,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:19,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:19,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:20,094 INFO L124 PetriNetUnfolderBase]: 1042/1865 cut-off events. [2024-06-27 17:50:20,094 INFO L125 PetriNetUnfolderBase]: For 49354/49354 co-relation queries the response was YES. [2024-06-27 17:50:20,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13619 conditions, 1865 events. 1042/1865 cut-off events. For 49354/49354 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9875 event pairs, 209 based on Foata normal form. 2/1790 useless extension candidates. Maximal degree in co-relation 13516. Up to 1390 conditions per place. [2024-06-27 17:50:20,111 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 159 selfloop transitions, 103 changer transitions 0/269 dead transitions. [2024-06-27 17:50:20,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 269 transitions, 4404 flow [2024-06-27 17:50:20,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:20,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 17:50:20,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43567251461988304 [2024-06-27 17:50:20,113 INFO L175 Difference]: Start difference. First operand has 214 places, 241 transitions, 3578 flow. Second operand 9 states and 149 transitions. [2024-06-27 17:50:20,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 269 transitions, 4404 flow [2024-06-27 17:50:20,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 269 transitions, 4300 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:20,235 INFO L231 Difference]: Finished difference. Result has 222 places, 245 transitions, 3802 flow [2024-06-27 17:50:20,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3802, PETRI_PLACES=222, PETRI_TRANSITIONS=245} [2024-06-27 17:50:20,235 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-27 17:50:20,235 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 245 transitions, 3802 flow [2024-06-27 17:50:20,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:20,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:20,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:20,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 17:50:20,236 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:20,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:20,236 INFO L85 PathProgramCache]: Analyzing trace with hash 185408342, now seen corresponding path program 1 times [2024-06-27 17:50:20,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:20,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824563274] [2024-06-27 17:50:20,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:20,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:20,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:20,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824563274] [2024-06-27 17:50:20,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824563274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:20,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:20,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:50:20,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936098924] [2024-06-27 17:50:20,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:20,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:50:20,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:20,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:50:20,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:50:20,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:20,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 245 transitions, 3802 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:20,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:20,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:20,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:21,317 INFO L124 PetriNetUnfolderBase]: 1039/1860 cut-off events. [2024-06-27 17:50:21,317 INFO L125 PetriNetUnfolderBase]: For 50065/50065 co-relation queries the response was YES. [2024-06-27 17:50:21,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13725 conditions, 1860 events. 1039/1860 cut-off events. For 50065/50065 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9821 event pairs, 209 based on Foata normal form. 1/1784 useless extension candidates. Maximal degree in co-relation 13619. Up to 1444 conditions per place. [2024-06-27 17:50:21,335 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 158 selfloop transitions, 99 changer transitions 0/264 dead transitions. [2024-06-27 17:50:21,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 264 transitions, 4430 flow [2024-06-27 17:50:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:21,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 17:50:21,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 17:50:21,336 INFO L175 Difference]: Start difference. First operand has 222 places, 245 transitions, 3802 flow. Second operand 8 states and 133 transitions. [2024-06-27 17:50:21,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 264 transitions, 4430 flow [2024-06-27 17:50:21,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 264 transitions, 4290 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:21,472 INFO L231 Difference]: Finished difference. Result has 226 places, 245 transitions, 3885 flow [2024-06-27 17:50:21,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=3662, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3885, PETRI_PLACES=226, PETRI_TRANSITIONS=245} [2024-06-27 17:50:21,473 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-27 17:50:21,473 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 245 transitions, 3885 flow [2024-06-27 17:50:21,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:21,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:21,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:21,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 17:50:21,474 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:21,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:21,474 INFO L85 PathProgramCache]: Analyzing trace with hash 578179993, now seen corresponding path program 3 times [2024-06-27 17:50:21,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:21,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90743624] [2024-06-27 17:50:21,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:21,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:21,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:21,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90743624] [2024-06-27 17:50:21,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90743624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:21,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:21,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:21,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2659674] [2024-06-27 17:50:21,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:21,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:21,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:21,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:21,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:21,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-06-27 17:50:21,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 245 transitions, 3885 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:21,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:21,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-06-27 17:50:21,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:22,420 INFO L124 PetriNetUnfolderBase]: 1102/1992 cut-off events. [2024-06-27 17:50:22,420 INFO L125 PetriNetUnfolderBase]: For 55104/55113 co-relation queries the response was YES. [2024-06-27 17:50:22,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14423 conditions, 1992 events. 1102/1992 cut-off events. For 55104/55113 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 10938 event pairs, 163 based on Foata normal form. 8/1912 useless extension candidates. Maximal degree in co-relation 14316. Up to 1327 conditions per place. [2024-06-27 17:50:22,439 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 182 selfloop transitions, 88 changer transitions 0/285 dead transitions. [2024-06-27 17:50:22,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 285 transitions, 4904 flow [2024-06-27 17:50:22,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:22,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:22,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 17:50:22,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4699248120300752 [2024-06-27 17:50:22,441 INFO L175 Difference]: Start difference. First operand has 226 places, 245 transitions, 3885 flow. Second operand 7 states and 125 transitions. [2024-06-27 17:50:22,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 285 transitions, 4904 flow [2024-06-27 17:50:22,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 285 transitions, 4706 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:22,579 INFO L231 Difference]: Finished difference. Result has 228 places, 264 transitions, 4204 flow [2024-06-27 17:50:22,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=3687, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4204, PETRI_PLACES=228, PETRI_TRANSITIONS=264} [2024-06-27 17:50:22,580 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-27 17:50:22,580 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 264 transitions, 4204 flow [2024-06-27 17:50:22,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:22,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:22,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:22,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 17:50:22,581 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:22,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:22,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1200230559, now seen corresponding path program 4 times [2024-06-27 17:50:22,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:22,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537024382] [2024-06-27 17:50:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:22,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:23,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:23,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537024382] [2024-06-27 17:50:23,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537024382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:23,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:23,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:23,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596376528] [2024-06-27 17:50:23,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:23,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:23,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:23,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:23,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:23,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:23,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 264 transitions, 4204 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:23,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:23,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:23,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:24,142 INFO L124 PetriNetUnfolderBase]: 1171/2100 cut-off events. [2024-06-27 17:50:24,143 INFO L125 PetriNetUnfolderBase]: For 60738/60738 co-relation queries the response was YES. [2024-06-27 17:50:24,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15625 conditions, 2100 events. 1171/2100 cut-off events. For 60738/60738 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 11505 event pairs, 268 based on Foata normal form. 2/2023 useless extension candidates. Maximal degree in co-relation 15515. Up to 1800 conditions per place. [2024-06-27 17:50:24,161 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 240 selfloop transitions, 48 changer transitions 0/295 dead transitions. [2024-06-27 17:50:24,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 295 transitions, 5119 flow [2024-06-27 17:50:24,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:24,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:24,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 17:50:24,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152046783625731 [2024-06-27 17:50:24,163 INFO L175 Difference]: Start difference. First operand has 228 places, 264 transitions, 4204 flow. Second operand 9 states and 142 transitions. [2024-06-27 17:50:24,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 295 transitions, 5119 flow [2024-06-27 17:50:24,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 295 transitions, 4855 flow, removed 99 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:24,326 INFO L231 Difference]: Finished difference. Result has 235 places, 274 transitions, 4313 flow [2024-06-27 17:50:24,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4010, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4313, PETRI_PLACES=235, PETRI_TRANSITIONS=274} [2024-06-27 17:50:24,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-27 17:50:24,327 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 274 transitions, 4313 flow [2024-06-27 17:50:24,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:24,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:24,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:24,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 17:50:24,328 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:24,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:24,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1498223067, now seen corresponding path program 5 times [2024-06-27 17:50:24,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:24,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544700553] [2024-06-27 17:50:24,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:24,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:24,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:25,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:25,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544700553] [2024-06-27 17:50:25,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544700553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:25,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:25,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:25,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075007925] [2024-06-27 17:50:25,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:25,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:25,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:25,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:25,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:25,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:25,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 274 transitions, 4313 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:25,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:25,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:25,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:26,098 INFO L124 PetriNetUnfolderBase]: 1251/2247 cut-off events. [2024-06-27 17:50:26,098 INFO L125 PetriNetUnfolderBase]: For 60124/60124 co-relation queries the response was YES. [2024-06-27 17:50:26,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16311 conditions, 2247 events. 1251/2247 cut-off events. For 60124/60124 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 12661 event pairs, 267 based on Foata normal form. 2/2164 useless extension candidates. Maximal degree in co-relation 16199. Up to 1839 conditions per place. [2024-06-27 17:50:26,120 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 246 selfloop transitions, 62 changer transitions 0/315 dead transitions. [2024-06-27 17:50:26,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 315 transitions, 5245 flow [2024-06-27 17:50:26,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:50:26,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:50:26,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-27 17:50:26,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41842105263157897 [2024-06-27 17:50:26,121 INFO L175 Difference]: Start difference. First operand has 235 places, 274 transitions, 4313 flow. Second operand 10 states and 159 transitions. [2024-06-27 17:50:26,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 315 transitions, 5245 flow [2024-06-27 17:50:26,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 315 transitions, 5129 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:26,312 INFO L231 Difference]: Finished difference. Result has 240 places, 288 transitions, 4558 flow [2024-06-27 17:50:26,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4201, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4558, PETRI_PLACES=240, PETRI_TRANSITIONS=288} [2024-06-27 17:50:26,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-27 17:50:26,313 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 288 transitions, 4558 flow [2024-06-27 17:50:26,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:26,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:26,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:26,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 17:50:26,314 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:26,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:26,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1501085979, now seen corresponding path program 2 times [2024-06-27 17:50:26,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:26,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817852870] [2024-06-27 17:50:26,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:26,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:27,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:27,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817852870] [2024-06-27 17:50:27,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817852870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:27,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:27,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:27,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266693159] [2024-06-27 17:50:27,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:27,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:27,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:27,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:27,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:27,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:27,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 288 transitions, 4558 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:27,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:27,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:27,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:27,843 INFO L124 PetriNetUnfolderBase]: 1265/2269 cut-off events. [2024-06-27 17:50:27,843 INFO L125 PetriNetUnfolderBase]: For 61847/61847 co-relation queries the response was YES. [2024-06-27 17:50:27,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16621 conditions, 2269 events. 1265/2269 cut-off events. For 61847/61847 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12819 event pairs, 296 based on Foata normal form. 2/2184 useless extension candidates. Maximal degree in co-relation 16507. Up to 1988 conditions per place. [2024-06-27 17:50:27,868 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 262 selfloop transitions, 45 changer transitions 0/314 dead transitions. [2024-06-27 17:50:27,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 314 transitions, 5350 flow [2024-06-27 17:50:27,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:50:27,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:50:27,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-27 17:50:27,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026315789473684 [2024-06-27 17:50:27,869 INFO L175 Difference]: Start difference. First operand has 240 places, 288 transitions, 4558 flow. Second operand 10 states and 153 transitions. [2024-06-27 17:50:27,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 314 transitions, 5350 flow [2024-06-27 17:50:28,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 314 transitions, 5199 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:28,091 INFO L231 Difference]: Finished difference. Result has 243 places, 292 transitions, 4569 flow [2024-06-27 17:50:28,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4407, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4569, PETRI_PLACES=243, PETRI_TRANSITIONS=292} [2024-06-27 17:50:28,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-27 17:50:28,092 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 292 transitions, 4569 flow [2024-06-27 17:50:28,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:28,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:28,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:28,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 17:50:28,093 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:28,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:28,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1501080182, now seen corresponding path program 2 times [2024-06-27 17:50:28,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:28,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796127763] [2024-06-27 17:50:28,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:28,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:28,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:28,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796127763] [2024-06-27 17:50:28,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796127763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:28,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:28,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:28,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130156402] [2024-06-27 17:50:28,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:28,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:28,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:28,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:28,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:28,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:28,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 292 transitions, 4569 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:28,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:28,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:28,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:29,550 INFO L124 PetriNetUnfolderBase]: 1265/2269 cut-off events. [2024-06-27 17:50:29,551 INFO L125 PetriNetUnfolderBase]: For 60768/60768 co-relation queries the response was YES. [2024-06-27 17:50:29,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16519 conditions, 2269 events. 1265/2269 cut-off events. For 60768/60768 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12826 event pairs, 295 based on Foata normal form. 1/2182 useless extension candidates. Maximal degree in co-relation 16404. Up to 1990 conditions per place. [2024-06-27 17:50:29,575 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 258 selfloop transitions, 48 changer transitions 0/313 dead transitions. [2024-06-27 17:50:29,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 313 transitions, 5321 flow [2024-06-27 17:50:29,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:29,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 17:50:29,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4093567251461988 [2024-06-27 17:50:29,576 INFO L175 Difference]: Start difference. First operand has 243 places, 292 transitions, 4569 flow. Second operand 9 states and 140 transitions. [2024-06-27 17:50:29,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 313 transitions, 5321 flow [2024-06-27 17:50:29,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 313 transitions, 5197 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 17:50:29,769 INFO L231 Difference]: Finished difference. Result has 244 places, 294 transitions, 4601 flow [2024-06-27 17:50:29,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4445, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4601, PETRI_PLACES=244, PETRI_TRANSITIONS=294} [2024-06-27 17:50:29,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-27 17:50:29,770 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 294 transitions, 4601 flow [2024-06-27 17:50:29,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:29,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:29,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:29,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 17:50:29,770 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:29,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:29,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1616586678, now seen corresponding path program 1 times [2024-06-27 17:50:29,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:29,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221163744] [2024-06-27 17:50:29,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:29,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:30,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:30,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221163744] [2024-06-27 17:50:30,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221163744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:30,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:30,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:30,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652677365] [2024-06-27 17:50:30,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:30,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:30,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:30,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:30,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:30,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:30,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 294 transitions, 4601 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:30,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:30,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:30,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:31,563 INFO L124 PetriNetUnfolderBase]: 1270/2282 cut-off events. [2024-06-27 17:50:31,563 INFO L125 PetriNetUnfolderBase]: For 62458/62458 co-relation queries the response was YES. [2024-06-27 17:50:31,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16584 conditions, 2282 events. 1270/2282 cut-off events. For 62458/62458 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 12964 event pairs, 401 based on Foata normal form. 1/2196 useless extension candidates. Maximal degree in co-relation 16468. Up to 1987 conditions per place. [2024-06-27 17:50:31,588 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 256 selfloop transitions, 54 changer transitions 0/317 dead transitions. [2024-06-27 17:50:31,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 317 transitions, 5378 flow [2024-06-27 17:50:31,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:50:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:50:31,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-27 17:50:31,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3973684210526316 [2024-06-27 17:50:31,589 INFO L175 Difference]: Start difference. First operand has 244 places, 294 transitions, 4601 flow. Second operand 10 states and 151 transitions. [2024-06-27 17:50:31,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 317 transitions, 5378 flow [2024-06-27 17:50:31,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 317 transitions, 5298 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:31,816 INFO L231 Difference]: Finished difference. Result has 249 places, 296 transitions, 4672 flow [2024-06-27 17:50:31,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4521, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4672, PETRI_PLACES=249, PETRI_TRANSITIONS=296} [2024-06-27 17:50:31,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-27 17:50:31,817 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 296 transitions, 4672 flow [2024-06-27 17:50:31,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:31,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:31,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 17:50:31,817 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:31,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:31,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1974306547, now seen corresponding path program 1 times [2024-06-27 17:50:31,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:31,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413819006] [2024-06-27 17:50:31,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:31,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:32,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:32,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413819006] [2024-06-27 17:50:32,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413819006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:32,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:32,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:32,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104411936] [2024-06-27 17:50:32,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:32,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:32,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:32,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:32,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:32,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:32,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 296 transitions, 4672 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:32,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:32,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:33,455 INFO L124 PetriNetUnfolderBase]: 1282/2304 cut-off events. [2024-06-27 17:50:33,455 INFO L125 PetriNetUnfolderBase]: For 66448/66448 co-relation queries the response was YES. [2024-06-27 17:50:33,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16799 conditions, 2304 events. 1282/2304 cut-off events. For 66448/66448 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13182 event pairs, 330 based on Foata normal form. 2/2211 useless extension candidates. Maximal degree in co-relation 16681. Up to 2009 conditions per place. [2024-06-27 17:50:33,479 INFO L140 encePairwiseOnDemand]: 24/38 looper letters, 265 selfloop transitions, 50 changer transitions 0/322 dead transitions. [2024-06-27 17:50:33,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 322 transitions, 5482 flow [2024-06-27 17:50:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:50:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:50:33,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 162 transitions. [2024-06-27 17:50:33,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875598086124402 [2024-06-27 17:50:33,480 INFO L175 Difference]: Start difference. First operand has 249 places, 296 transitions, 4672 flow. Second operand 11 states and 162 transitions. [2024-06-27 17:50:33,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 322 transitions, 5482 flow [2024-06-27 17:50:33,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 322 transitions, 5358 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 17:50:33,690 INFO L231 Difference]: Finished difference. Result has 252 places, 298 transitions, 4689 flow [2024-06-27 17:50:33,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4548, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4689, PETRI_PLACES=252, PETRI_TRANSITIONS=298} [2024-06-27 17:50:33,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-27 17:50:33,690 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 298 transitions, 4689 flow [2024-06-27 17:50:33,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:33,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:33,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 17:50:33,691 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:33,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:33,691 INFO L85 PathProgramCache]: Analyzing trace with hash -792240549, now seen corresponding path program 6 times [2024-06-27 17:50:33,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:33,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440046624] [2024-06-27 17:50:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:33,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:34,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:34,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440046624] [2024-06-27 17:50:34,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440046624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:34,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:34,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:34,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226839183] [2024-06-27 17:50:34,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:34,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:34,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:34,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:34,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:34,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:34,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 298 transitions, 4689 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:34,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:34,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:35,267 INFO L124 PetriNetUnfolderBase]: 1317/2364 cut-off events. [2024-06-27 17:50:35,267 INFO L125 PetriNetUnfolderBase]: For 66775/66775 co-relation queries the response was YES. [2024-06-27 17:50:35,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17245 conditions, 2364 events. 1317/2364 cut-off events. For 66775/66775 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13490 event pairs, 354 based on Foata normal form. 2/2277 useless extension candidates. Maximal degree in co-relation 17126. Up to 1948 conditions per place. [2024-06-27 17:50:35,290 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 251 selfloop transitions, 66 changer transitions 0/324 dead transitions. [2024-06-27 17:50:35,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 324 transitions, 5551 flow [2024-06-27 17:50:35,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:35,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:35,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 17:50:35,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144736842105263 [2024-06-27 17:50:35,292 INFO L175 Difference]: Start difference. First operand has 252 places, 298 transitions, 4689 flow. Second operand 8 states and 126 transitions. [2024-06-27 17:50:35,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 324 transitions, 5551 flow [2024-06-27 17:50:35,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 324 transitions, 5436 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 17:50:35,486 INFO L231 Difference]: Finished difference. Result has 251 places, 304 transitions, 4866 flow [2024-06-27 17:50:35,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4574, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4866, PETRI_PLACES=251, PETRI_TRANSITIONS=304} [2024-06-27 17:50:35,486 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-27 17:50:35,486 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 304 transitions, 4866 flow [2024-06-27 17:50:35,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:35,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:35,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:35,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 17:50:35,487 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:35,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:35,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1784550699, now seen corresponding path program 7 times [2024-06-27 17:50:35,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:35,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458484340] [2024-06-27 17:50:35,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:35,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:36,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:36,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458484340] [2024-06-27 17:50:36,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458484340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:36,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:36,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:36,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263347039] [2024-06-27 17:50:36,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:36,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:36,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:36,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:36,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:36,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:36,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 304 transitions, 4866 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:36,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:36,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:36,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:37,047 INFO L124 PetriNetUnfolderBase]: 1314/2357 cut-off events. [2024-06-27 17:50:37,047 INFO L125 PetriNetUnfolderBase]: For 67724/67724 co-relation queries the response was YES. [2024-06-27 17:50:37,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17357 conditions, 2357 events. 1314/2357 cut-off events. For 67724/67724 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13417 event pairs, 222 based on Foata normal form. 2/2272 useless extension candidates. Maximal degree in co-relation 17237. Up to 1665 conditions per place. [2024-06-27 17:50:37,072 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 224 selfloop transitions, 100 changer transitions 0/331 dead transitions. [2024-06-27 17:50:37,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 331 transitions, 5680 flow [2024-06-27 17:50:37,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:37,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:37,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 17:50:37,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152046783625731 [2024-06-27 17:50:37,074 INFO L175 Difference]: Start difference. First operand has 251 places, 304 transitions, 4866 flow. Second operand 9 states and 142 transitions. [2024-06-27 17:50:37,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 331 transitions, 5680 flow [2024-06-27 17:50:37,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 331 transitions, 5478 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:37,287 INFO L231 Difference]: Finished difference. Result has 254 places, 304 transitions, 4893 flow [2024-06-27 17:50:37,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4664, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4893, PETRI_PLACES=254, PETRI_TRANSITIONS=304} [2024-06-27 17:50:37,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-27 17:50:37,288 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 304 transitions, 4893 flow [2024-06-27 17:50:37,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:37,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:37,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:37,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 17:50:37,288 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:37,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:37,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1083048620, now seen corresponding path program 3 times [2024-06-27 17:50:37,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:37,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577658288] [2024-06-27 17:50:37,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:37,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:38,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:38,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577658288] [2024-06-27 17:50:38,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577658288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:38,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:38,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:38,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59612331] [2024-06-27 17:50:38,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:38,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:38,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:38,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:38,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:38,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:38,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 304 transitions, 4893 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:38,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:38,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:38,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:38,779 INFO L124 PetriNetUnfolderBase]: 1312/2355 cut-off events. [2024-06-27 17:50:38,779 INFO L125 PetriNetUnfolderBase]: For 64828/64828 co-relation queries the response was YES. [2024-06-27 17:50:38,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17417 conditions, 2355 events. 1312/2355 cut-off events. For 64828/64828 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13419 event pairs, 351 based on Foata normal form. 1/2266 useless extension candidates. Maximal degree in co-relation 17296. Up to 1999 conditions per place. [2024-06-27 17:50:38,806 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 251 selfloop transitions, 64 changer transitions 0/322 dead transitions. [2024-06-27 17:50:38,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 322 transitions, 5627 flow [2024-06-27 17:50:38,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:38,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:38,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 17:50:38,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40789473684210525 [2024-06-27 17:50:38,807 INFO L175 Difference]: Start difference. First operand has 254 places, 304 transitions, 4893 flow. Second operand 8 states and 124 transitions. [2024-06-27 17:50:38,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 322 transitions, 5627 flow [2024-06-27 17:50:39,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 322 transitions, 5412 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 17:50:39,034 INFO L231 Difference]: Finished difference. Result has 254 places, 304 transitions, 4836 flow [2024-06-27 17:50:39,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4678, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4836, PETRI_PLACES=254, PETRI_TRANSITIONS=304} [2024-06-27 17:50:39,035 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-27 17:50:39,035 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 304 transitions, 4836 flow [2024-06-27 17:50:39,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:39,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:39,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:39,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 17:50:39,036 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:39,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:39,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1169855467, now seen corresponding path program 3 times [2024-06-27 17:50:39,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:39,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176822186] [2024-06-27 17:50:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:39,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:39,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:39,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176822186] [2024-06-27 17:50:39,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176822186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:39,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:39,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:39,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356406944] [2024-06-27 17:50:39,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:39,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:39,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:39,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:39,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:39,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:39,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 304 transitions, 4836 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:39,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:39,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:39,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:40,540 INFO L124 PetriNetUnfolderBase]: 1334/2390 cut-off events. [2024-06-27 17:50:40,540 INFO L125 PetriNetUnfolderBase]: For 62704/62704 co-relation queries the response was YES. [2024-06-27 17:50:40,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17371 conditions, 2390 events. 1334/2390 cut-off events. For 62704/62704 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13675 event pairs, 352 based on Foata normal form. 2/2301 useless extension candidates. Maximal degree in co-relation 17251. Up to 2027 conditions per place. [2024-06-27 17:50:40,563 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 264 selfloop transitions, 58 changer transitions 0/329 dead transitions. [2024-06-27 17:50:40,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 329 transitions, 5670 flow [2024-06-27 17:50:40,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:40,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-27 17:50:40,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40058479532163743 [2024-06-27 17:50:40,565 INFO L175 Difference]: Start difference. First operand has 254 places, 304 transitions, 4836 flow. Second operand 9 states and 137 transitions. [2024-06-27 17:50:40,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 329 transitions, 5670 flow [2024-06-27 17:50:40,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 329 transitions, 5491 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 17:50:40,768 INFO L231 Difference]: Finished difference. Result has 255 places, 308 transitions, 4859 flow [2024-06-27 17:50:40,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4657, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4859, PETRI_PLACES=255, PETRI_TRANSITIONS=308} [2024-06-27 17:50:40,769 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-27 17:50:40,769 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 308 transitions, 4859 flow [2024-06-27 17:50:40,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:40,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:40,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:40,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 17:50:40,770 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:40,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:40,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1902311945, now seen corresponding path program 4 times [2024-06-27 17:50:40,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:40,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178442899] [2024-06-27 17:50:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:40,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:41,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:41,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:41,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178442899] [2024-06-27 17:50:41,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178442899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:41,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:41,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:41,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038484628] [2024-06-27 17:50:41,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:41,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:41,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:41,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:41,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:41,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:41,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 308 transitions, 4859 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:41,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:41,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:41,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:42,217 INFO L124 PetriNetUnfolderBase]: 1356/2420 cut-off events. [2024-06-27 17:50:42,217 INFO L125 PetriNetUnfolderBase]: For 62674/62674 co-relation queries the response was YES. [2024-06-27 17:50:42,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17628 conditions, 2420 events. 1356/2420 cut-off events. For 62674/62674 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 13832 event pairs, 296 based on Foata normal form. 2/2327 useless extension candidates. Maximal degree in co-relation 17508. Up to 1862 conditions per place. [2024-06-27 17:50:42,241 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 217 selfloop transitions, 113 changer transitions 0/337 dead transitions. [2024-06-27 17:50:42,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 337 transitions, 5778 flow [2024-06-27 17:50:42,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:42,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:42,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 17:50:42,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152046783625731 [2024-06-27 17:50:42,242 INFO L175 Difference]: Start difference. First operand has 255 places, 308 transitions, 4859 flow. Second operand 9 states and 142 transitions. [2024-06-27 17:50:42,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 337 transitions, 5778 flow [2024-06-27 17:50:42,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 337 transitions, 5624 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:42,453 INFO L231 Difference]: Finished difference. Result has 257 places, 312 transitions, 5019 flow [2024-06-27 17:50:42,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4713, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5019, PETRI_PLACES=257, PETRI_TRANSITIONS=312} [2024-06-27 17:50:42,454 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-27 17:50:42,454 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 312 transitions, 5019 flow [2024-06-27 17:50:42,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:42,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:42,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:42,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 17:50:42,455 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:42,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:42,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1902319664, now seen corresponding path program 2 times [2024-06-27 17:50:42,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:42,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836042741] [2024-06-27 17:50:42,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:42,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:44,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:44,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836042741] [2024-06-27 17:50:44,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836042741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:44,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:44,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:44,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598286401] [2024-06-27 17:50:44,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:44,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:44,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:44,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:44,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:44,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:44,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 312 transitions, 5019 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:44,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:44,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:44,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:45,180 INFO L124 PetriNetUnfolderBase]: 1361/2432 cut-off events. [2024-06-27 17:50:45,180 INFO L125 PetriNetUnfolderBase]: For 62762/62762 co-relation queries the response was YES. [2024-06-27 17:50:45,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17819 conditions, 2432 events. 1361/2432 cut-off events. For 62762/62762 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13953 event pairs, 419 based on Foata normal form. 1/2339 useless extension candidates. Maximal degree in co-relation 17698. Up to 2081 conditions per place. [2024-06-27 17:50:45,208 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 266 selfloop transitions, 62 changer transitions 0/335 dead transitions. [2024-06-27 17:50:45,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 335 transitions, 5861 flow [2024-06-27 17:50:45,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:45,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-27 17:50:45,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39766081871345027 [2024-06-27 17:50:45,209 INFO L175 Difference]: Start difference. First operand has 257 places, 312 transitions, 5019 flow. Second operand 9 states and 136 transitions. [2024-06-27 17:50:45,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 335 transitions, 5861 flow [2024-06-27 17:50:45,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 335 transitions, 5601 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:45,440 INFO L231 Difference]: Finished difference. Result has 259 places, 314 transitions, 4938 flow [2024-06-27 17:50:45,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4759, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4938, PETRI_PLACES=259, PETRI_TRANSITIONS=314} [2024-06-27 17:50:45,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-27 17:50:45,441 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 314 transitions, 4938 flow [2024-06-27 17:50:45,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:45,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:45,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:45,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 17:50:45,442 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:45,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:45,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1902914031, now seen corresponding path program 5 times [2024-06-27 17:50:45,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:45,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061892101] [2024-06-27 17:50:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:45,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:46,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:46,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061892101] [2024-06-27 17:50:46,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061892101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:46,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:46,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:46,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246715272] [2024-06-27 17:50:46,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:46,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:46,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:46,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:46,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:46,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:46,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 314 transitions, 4938 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:46,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:46,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:46,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:47,011 INFO L124 PetriNetUnfolderBase]: 1398/2485 cut-off events. [2024-06-27 17:50:47,011 INFO L125 PetriNetUnfolderBase]: For 67221/67221 co-relation queries the response was YES. [2024-06-27 17:50:47,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18184 conditions, 2485 events. 1398/2485 cut-off events. For 67221/67221 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 14237 event pairs, 296 based on Foata normal form. 2/2389 useless extension candidates. Maximal degree in co-relation 18062. Up to 1781 conditions per place. [2024-06-27 17:50:47,038 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 209 selfloop transitions, 131 changer transitions 0/347 dead transitions. [2024-06-27 17:50:47,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 347 transitions, 6031 flow [2024-06-27 17:50:47,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:47,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:47,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 17:50:47,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4239766081871345 [2024-06-27 17:50:47,039 INFO L175 Difference]: Start difference. First operand has 259 places, 314 transitions, 4938 flow. Second operand 9 states and 145 transitions. [2024-06-27 17:50:47,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 347 transitions, 6031 flow [2024-06-27 17:50:47,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 347 transitions, 5889 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:47,266 INFO L231 Difference]: Finished difference. Result has 261 places, 320 transitions, 5194 flow [2024-06-27 17:50:47,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=4798, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5194, PETRI_PLACES=261, PETRI_TRANSITIONS=320} [2024-06-27 17:50:47,267 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-27 17:50:47,267 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 320 transitions, 5194 flow [2024-06-27 17:50:47,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:47,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:47,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:47,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 17:50:47,268 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:47,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:47,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1902704781, now seen corresponding path program 6 times [2024-06-27 17:50:47,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:47,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545630027] [2024-06-27 17:50:47,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:47,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:48,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:48,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545630027] [2024-06-27 17:50:48,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545630027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:48,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:48,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:48,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149100039] [2024-06-27 17:50:48,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:48,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:48,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:48,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:48,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:48,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:48,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 320 transitions, 5194 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:48,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:48,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:48,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:48,950 INFO L124 PetriNetUnfolderBase]: 1408/2500 cut-off events. [2024-06-27 17:50:48,950 INFO L125 PetriNetUnfolderBase]: For 68006/68006 co-relation queries the response was YES. [2024-06-27 17:50:48,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18593 conditions, 2500 events. 1408/2500 cut-off events. For 68006/68006 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14334 event pairs, 317 based on Foata normal form. 2/2402 useless extension candidates. Maximal degree in co-relation 18470. Up to 2069 conditions per place. [2024-06-27 17:50:48,976 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 254 selfloop transitions, 85 changer transitions 0/346 dead transitions. [2024-06-27 17:50:48,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 346 transitions, 6111 flow [2024-06-27 17:50:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:48,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:48,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 17:50:48,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4093567251461988 [2024-06-27 17:50:48,978 INFO L175 Difference]: Start difference. First operand has 261 places, 320 transitions, 5194 flow. Second operand 9 states and 140 transitions. [2024-06-27 17:50:48,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 346 transitions, 6111 flow [2024-06-27 17:50:49,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 346 transitions, 5913 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:49,238 INFO L231 Difference]: Finished difference. Result has 265 places, 324 transitions, 5262 flow [2024-06-27 17:50:49,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5000, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5262, PETRI_PLACES=265, PETRI_TRANSITIONS=324} [2024-06-27 17:50:49,238 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-27 17:50:49,238 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 324 transitions, 5262 flow [2024-06-27 17:50:49,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:49,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:49,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:49,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 17:50:49,239 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:49,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:49,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2075972395, now seen corresponding path program 2 times [2024-06-27 17:50:49,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:49,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495579656] [2024-06-27 17:50:49,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:49,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:50,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:50,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495579656] [2024-06-27 17:50:50,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495579656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:50,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:50,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:50,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717397748] [2024-06-27 17:50:50,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:50,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:50,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:50,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:50,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:50,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:50,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 324 transitions, 5262 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:50,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:50,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:50,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:51,325 INFO L124 PetriNetUnfolderBase]: 1420/2526 cut-off events. [2024-06-27 17:50:51,325 INFO L125 PetriNetUnfolderBase]: For 70088/70088 co-relation queries the response was YES. [2024-06-27 17:50:51,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18820 conditions, 2526 events. 1420/2526 cut-off events. For 70088/70088 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 14640 event pairs, 362 based on Foata normal form. 2/2421 useless extension candidates. Maximal degree in co-relation 18695. Up to 2178 conditions per place. [2024-06-27 17:50:51,352 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 286 selfloop transitions, 56 changer transitions 0/349 dead transitions. [2024-06-27 17:50:51,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 349 transitions, 6139 flow [2024-06-27 17:50:51,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:50:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:50:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-27 17:50:51,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894736842105263 [2024-06-27 17:50:51,355 INFO L175 Difference]: Start difference. First operand has 265 places, 324 transitions, 5262 flow. Second operand 10 states and 148 transitions. [2024-06-27 17:50:51,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 349 transitions, 6139 flow [2024-06-27 17:50:51,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 349 transitions, 5931 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:51,590 INFO L231 Difference]: Finished difference. Result has 268 places, 326 transitions, 5214 flow [2024-06-27 17:50:51,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5054, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5214, PETRI_PLACES=268, PETRI_TRANSITIONS=326} [2024-06-27 17:50:51,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-27 17:50:51,591 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 326 transitions, 5214 flow [2024-06-27 17:50:51,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:51,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:51,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:51,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 17:50:51,591 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:51,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:51,592 INFO L85 PathProgramCache]: Analyzing trace with hash 417289455, now seen corresponding path program 3 times [2024-06-27 17:50:51,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:51,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172012512] [2024-06-27 17:50:51,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:51,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:52,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:52,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172012512] [2024-06-27 17:50:52,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172012512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:52,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:52,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:52,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077564880] [2024-06-27 17:50:52,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:52,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:52,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:52,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:52,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:52,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:52,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 326 transitions, 5214 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:52,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:52,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:52,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:53,682 INFO L124 PetriNetUnfolderBase]: 1416/2518 cut-off events. [2024-06-27 17:50:53,682 INFO L125 PetriNetUnfolderBase]: For 67477/67477 co-relation queries the response was YES. [2024-06-27 17:50:53,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18571 conditions, 2518 events. 1416/2518 cut-off events. For 67477/67477 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14573 event pairs, 525 based on Foata normal form. 2/2421 useless extension candidates. Maximal degree in co-relation 18445. Up to 2296 conditions per place. [2024-06-27 17:50:53,710 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 316 selfloop transitions, 19 changer transitions 0/342 dead transitions. [2024-06-27 17:50:53,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 342 transitions, 5990 flow [2024-06-27 17:50:53,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-27 17:50:53,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3830409356725146 [2024-06-27 17:50:53,712 INFO L175 Difference]: Start difference. First operand has 268 places, 326 transitions, 5214 flow. Second operand 9 states and 131 transitions. [2024-06-27 17:50:53,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 342 transitions, 5990 flow [2024-06-27 17:50:53,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 342 transitions, 5854 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 17:50:53,973 INFO L231 Difference]: Finished difference. Result has 269 places, 326 transitions, 5125 flow [2024-06-27 17:50:53,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5078, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5125, PETRI_PLACES=269, PETRI_TRANSITIONS=326} [2024-06-27 17:50:53,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-27 17:50:53,974 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 326 transitions, 5125 flow [2024-06-27 17:50:53,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:53,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:53,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:53,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 17:50:53,974 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:53,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:53,974 INFO L85 PathProgramCache]: Analyzing trace with hash 67351659, now seen corresponding path program 7 times [2024-06-27 17:50:53,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:53,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642611648] [2024-06-27 17:50:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:53,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:54,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:54,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642611648] [2024-06-27 17:50:54,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642611648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:54,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:54,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:54,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059031663] [2024-06-27 17:50:54,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:54,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:54,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:54,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:54,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:54,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:54,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 326 transitions, 5125 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:54,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:54,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:54,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:55,359 INFO L124 PetriNetUnfolderBase]: 1427/2535 cut-off events. [2024-06-27 17:50:55,359 INFO L125 PetriNetUnfolderBase]: For 67807/67807 co-relation queries the response was YES. [2024-06-27 17:50:55,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18601 conditions, 2535 events. 1427/2535 cut-off events. For 67807/67807 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 14691 event pairs, 525 based on Foata normal form. 2/2437 useless extension candidates. Maximal degree in co-relation 18474. Up to 2336 conditions per place. [2024-06-27 17:50:55,386 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 322 selfloop transitions, 15 changer transitions 0/344 dead transitions. [2024-06-27 17:50:55,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 344 transitions, 5957 flow [2024-06-27 17:50:55,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:55,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:55,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 128 transitions. [2024-06-27 17:50:55,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3742690058479532 [2024-06-27 17:50:55,387 INFO L175 Difference]: Start difference. First operand has 269 places, 326 transitions, 5125 flow. Second operand 9 states and 128 transitions. [2024-06-27 17:50:55,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 344 transitions, 5957 flow [2024-06-27 17:50:55,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 344 transitions, 5919 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 17:50:55,654 INFO L231 Difference]: Finished difference. Result has 270 places, 328 transitions, 5178 flow [2024-06-27 17:50:55,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5087, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5178, PETRI_PLACES=270, PETRI_TRANSITIONS=328} [2024-06-27 17:50:55,655 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-27 17:50:55,655 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 328 transitions, 5178 flow [2024-06-27 17:50:55,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:55,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:55,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:55,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 17:50:55,655 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:55,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:55,656 INFO L85 PathProgramCache]: Analyzing trace with hash -494768419, now seen corresponding path program 8 times [2024-06-27 17:50:55,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:55,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844324467] [2024-06-27 17:50:55,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:55,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:56,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:56,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844324467] [2024-06-27 17:50:56,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844324467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:56,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:56,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:56,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120068829] [2024-06-27 17:50:56,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:56,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:56,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:56,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:56,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:56,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:56,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 328 transitions, 5178 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:56,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:56,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:56,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:57,161 INFO L124 PetriNetUnfolderBase]: 1464/2587 cut-off events. [2024-06-27 17:50:57,162 INFO L125 PetriNetUnfolderBase]: For 73291/73291 co-relation queries the response was YES. [2024-06-27 17:50:57,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19232 conditions, 2587 events. 1464/2587 cut-off events. For 73291/73291 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 14887 event pairs, 327 based on Foata normal form. 2/2477 useless extension candidates. Maximal degree in co-relation 19104. Up to 2153 conditions per place. [2024-06-27 17:50:57,189 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 266 selfloop transitions, 83 changer transitions 0/356 dead transitions. [2024-06-27 17:50:57,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 356 transitions, 6255 flow [2024-06-27 17:50:57,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:57,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 17:50:57,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152046783625731 [2024-06-27 17:50:57,208 INFO L175 Difference]: Start difference. First operand has 270 places, 328 transitions, 5178 flow. Second operand 9 states and 142 transitions. [2024-06-27 17:50:57,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 356 transitions, 6255 flow [2024-06-27 17:50:57,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 356 transitions, 6184 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:57,482 INFO L231 Difference]: Finished difference. Result has 273 places, 334 transitions, 5417 flow [2024-06-27 17:50:57,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5107, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5417, PETRI_PLACES=273, PETRI_TRANSITIONS=334} [2024-06-27 17:50:57,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-27 17:50:57,483 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 334 transitions, 5417 flow [2024-06-27 17:50:57,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:57,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:57,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:57,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 17:50:57,483 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:57,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:57,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1877124223, now seen corresponding path program 9 times [2024-06-27 17:50:57,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:57,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868251204] [2024-06-27 17:50:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:57,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:58,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:58,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868251204] [2024-06-27 17:50:58,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868251204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:58,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:58,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:58,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118224413] [2024-06-27 17:50:58,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:58,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:58,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:58,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:58,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:58,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:50:58,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 334 transitions, 5417 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:58,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:58,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:50:58,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:59,098 INFO L124 PetriNetUnfolderBase]: 1460/2581 cut-off events. [2024-06-27 17:50:59,098 INFO L125 PetriNetUnfolderBase]: For 73424/73424 co-relation queries the response was YES. [2024-06-27 17:50:59,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19299 conditions, 2581 events. 1460/2581 cut-off events. For 73424/73424 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 14822 event pairs, 330 based on Foata normal form. 2/2471 useless extension candidates. Maximal degree in co-relation 19169. Up to 2173 conditions per place. [2024-06-27 17:50:59,126 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 266 selfloop transitions, 80 changer transitions 0/353 dead transitions. [2024-06-27 17:50:59,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 353 transitions, 6242 flow [2024-06-27 17:50:59,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:59,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:59,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-27 17:50:59,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40058479532163743 [2024-06-27 17:50:59,128 INFO L175 Difference]: Start difference. First operand has 273 places, 334 transitions, 5417 flow. Second operand 9 states and 137 transitions. [2024-06-27 17:50:59,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 353 transitions, 6242 flow [2024-06-27 17:50:59,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 353 transitions, 6061 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:59,428 INFO L231 Difference]: Finished difference. Result has 278 places, 334 transitions, 5401 flow [2024-06-27 17:50:59,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5236, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5401, PETRI_PLACES=278, PETRI_TRANSITIONS=334} [2024-06-27 17:50:59,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-27 17:50:59,428 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 334 transitions, 5401 flow [2024-06-27 17:50:59,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:59,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:59,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:59,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 17:50:59,429 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:59,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:59,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1752116333, now seen corresponding path program 10 times [2024-06-27 17:50:59,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:59,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877605611] [2024-06-27 17:50:59,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:59,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:00,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:00,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877605611] [2024-06-27 17:51:00,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877605611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:00,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:00,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:00,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935792382] [2024-06-27 17:51:00,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:00,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:00,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:00,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:00,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:00,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:00,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 334 transitions, 5401 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:00,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:00,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:00,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:01,099 INFO L124 PetriNetUnfolderBase]: 1471/2598 cut-off events. [2024-06-27 17:51:01,099 INFO L125 PetriNetUnfolderBase]: For 74493/74493 co-relation queries the response was YES. [2024-06-27 17:51:01,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19507 conditions, 2598 events. 1471/2598 cut-off events. For 74493/74493 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 14969 event pairs, 327 based on Foata normal form. 2/2487 useless extension candidates. Maximal degree in co-relation 19375. Up to 2144 conditions per place. [2024-06-27 17:51:01,125 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 266 selfloop transitions, 86 changer transitions 0/359 dead transitions. [2024-06-27 17:51:01,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 359 transitions, 6342 flow [2024-06-27 17:51:01,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:01,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:01,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 17:51:01,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152046783625731 [2024-06-27 17:51:01,127 INFO L175 Difference]: Start difference. First operand has 278 places, 334 transitions, 5401 flow. Second operand 9 states and 142 transitions. [2024-06-27 17:51:01,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 359 transitions, 6342 flow [2024-06-27 17:51:01,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 359 transitions, 6173 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:01,388 INFO L231 Difference]: Finished difference. Result has 279 places, 336 transitions, 5476 flow [2024-06-27 17:51:01,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5232, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5476, PETRI_PLACES=279, PETRI_TRANSITIONS=336} [2024-06-27 17:51:01,389 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-27 17:51:01,389 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 336 transitions, 5476 flow [2024-06-27 17:51:01,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:01,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:01,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:01,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 17:51:01,390 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:01,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:01,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1752123773, now seen corresponding path program 11 times [2024-06-27 17:51:01,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:01,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739548565] [2024-06-27 17:51:01,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:01,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:02,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:02,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739548565] [2024-06-27 17:51:02,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739548565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:02,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:02,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:02,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753929522] [2024-06-27 17:51:02,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:02,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:02,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:02,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:02,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:02,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:02,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 336 transitions, 5476 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:02,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:02,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:02,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:03,105 INFO L124 PetriNetUnfolderBase]: 1497/2636 cut-off events. [2024-06-27 17:51:03,106 INFO L125 PetriNetUnfolderBase]: For 81512/81512 co-relation queries the response was YES. [2024-06-27 17:51:03,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20163 conditions, 2636 events. 1497/2636 cut-off events. For 81512/81512 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15178 event pairs, 320 based on Foata normal form. 2/2524 useless extension candidates. Maximal degree in co-relation 20030. Up to 2130 conditions per place. [2024-06-27 17:51:03,133 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 262 selfloop transitions, 98 changer transitions 0/367 dead transitions. [2024-06-27 17:51:03,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 367 transitions, 6638 flow [2024-06-27 17:51:03,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:03,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 17:51:03,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41578947368421054 [2024-06-27 17:51:03,134 INFO L175 Difference]: Start difference. First operand has 279 places, 336 transitions, 5476 flow. Second operand 10 states and 158 transitions. [2024-06-27 17:51:03,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 367 transitions, 6638 flow [2024-06-27 17:51:03,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 367 transitions, 6417 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:03,432 INFO L231 Difference]: Finished difference. Result has 281 places, 340 transitions, 5593 flow [2024-06-27 17:51:03,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5257, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5593, PETRI_PLACES=281, PETRI_TRANSITIONS=340} [2024-06-27 17:51:03,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-27 17:51:03,433 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 340 transitions, 5593 flow [2024-06-27 17:51:03,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:03,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:03,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:03,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 17:51:03,434 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:03,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:03,434 INFO L85 PathProgramCache]: Analyzing trace with hash 67361579, now seen corresponding path program 4 times [2024-06-27 17:51:03,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:03,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113673777] [2024-06-27 17:51:03,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:03,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:04,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:04,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113673777] [2024-06-27 17:51:04,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113673777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:04,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:04,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:51:04,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525196695] [2024-06-27 17:51:04,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:04,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:51:04,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:04,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:51:04,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:51:04,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:04,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 340 transitions, 5593 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:04,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:04,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:04,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:04,926 INFO L124 PetriNetUnfolderBase]: 1509/2662 cut-off events. [2024-06-27 17:51:04,926 INFO L125 PetriNetUnfolderBase]: For 82617/82617 co-relation queries the response was YES. [2024-06-27 17:51:04,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20304 conditions, 2662 events. 1509/2662 cut-off events. For 82617/82617 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15474 event pairs, 349 based on Foata normal form. 2/2546 useless extension candidates. Maximal degree in co-relation 20171. Up to 2071 conditions per place. [2024-06-27 17:51:04,952 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 271 selfloop transitions, 84 changer transitions 0/362 dead transitions. [2024-06-27 17:51:04,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 362 transitions, 6587 flow [2024-06-27 17:51:04,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:04,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 17:51:04,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152046783625731 [2024-06-27 17:51:04,953 INFO L175 Difference]: Start difference. First operand has 281 places, 340 transitions, 5593 flow. Second operand 9 states and 142 transitions. [2024-06-27 17:51:04,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 362 transitions, 6587 flow [2024-06-27 17:51:05,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 362 transitions, 6408 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 17:51:05,235 INFO L231 Difference]: Finished difference. Result has 283 places, 342 transitions, 5626 flow [2024-06-27 17:51:05,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5416, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5626, PETRI_PLACES=283, PETRI_TRANSITIONS=342} [2024-06-27 17:51:05,236 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-27 17:51:05,236 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 342 transitions, 5626 flow [2024-06-27 17:51:05,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:05,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:05,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:05,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 17:51:05,237 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:05,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:05,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1884475873, now seen corresponding path program 12 times [2024-06-27 17:51:05,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:05,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013359685] [2024-06-27 17:51:05,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:05,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:06,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:06,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013359685] [2024-06-27 17:51:06,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013359685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:06,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:06,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:06,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483233735] [2024-06-27 17:51:06,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:06,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:06,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:06,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:06,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:06,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:06,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 342 transitions, 5626 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:06,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:06,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:06,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:06,949 INFO L124 PetriNetUnfolderBase]: 1505/2648 cut-off events. [2024-06-27 17:51:06,949 INFO L125 PetriNetUnfolderBase]: For 76536/76536 co-relation queries the response was YES. [2024-06-27 17:51:06,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20156 conditions, 2648 events. 1505/2648 cut-off events. For 76536/76536 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 15266 event pairs, 335 based on Foata normal form. 2/2534 useless extension candidates. Maximal degree in co-relation 20022. Up to 2246 conditions per place. [2024-06-27 17:51:06,973 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 275 selfloop transitions, 82 changer transitions 0/364 dead transitions. [2024-06-27 17:51:06,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 364 transitions, 6508 flow [2024-06-27 17:51:06,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:06,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:06,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-27 17:51:06,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3973684210526316 [2024-06-27 17:51:06,975 INFO L175 Difference]: Start difference. First operand has 283 places, 342 transitions, 5626 flow. Second operand 10 states and 151 transitions. [2024-06-27 17:51:06,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 364 transitions, 6508 flow [2024-06-27 17:51:07,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 364 transitions, 6322 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:07,252 INFO L231 Difference]: Finished difference. Result has 287 places, 342 transitions, 5609 flow [2024-06-27 17:51:07,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5440, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5609, PETRI_PLACES=287, PETRI_TRANSITIONS=342} [2024-06-27 17:51:07,253 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-27 17:51:07,253 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 342 transitions, 5609 flow [2024-06-27 17:51:07,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:07,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:07,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:07,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 17:51:07,254 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:07,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:07,254 INFO L85 PathProgramCache]: Analyzing trace with hash -246607041, now seen corresponding path program 13 times [2024-06-27 17:51:07,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:07,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824091365] [2024-06-27 17:51:07,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:07,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:08,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:08,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824091365] [2024-06-27 17:51:08,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824091365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:08,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:08,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:08,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854339609] [2024-06-27 17:51:08,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:08,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:08,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:08,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:08,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:08,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:08,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 342 transitions, 5609 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:08,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:08,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:08,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:08,900 INFO L124 PetriNetUnfolderBase]: 1516/2667 cut-off events. [2024-06-27 17:51:08,900 INFO L125 PetriNetUnfolderBase]: For 78815/78815 co-relation queries the response was YES. [2024-06-27 17:51:08,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20276 conditions, 2667 events. 1516/2667 cut-off events. For 78815/78815 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 15409 event pairs, 311 based on Foata normal form. 2/2551 useless extension candidates. Maximal degree in co-relation 20141. Up to 1740 conditions per place. [2024-06-27 17:51:08,933 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 223 selfloop transitions, 141 changer transitions 0/371 dead transitions. [2024-06-27 17:51:08,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 371 transitions, 6851 flow [2024-06-27 17:51:08,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:08,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 17:51:08,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43567251461988304 [2024-06-27 17:51:08,934 INFO L175 Difference]: Start difference. First operand has 287 places, 342 transitions, 5609 flow. Second operand 9 states and 149 transitions. [2024-06-27 17:51:08,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 371 transitions, 6851 flow [2024-06-27 17:51:09,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 371 transitions, 6669 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:09,333 INFO L231 Difference]: Finished difference. Result has 288 places, 346 transitions, 5846 flow [2024-06-27 17:51:09,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5427, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5846, PETRI_PLACES=288, PETRI_TRANSITIONS=346} [2024-06-27 17:51:09,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-27 17:51:09,334 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 346 transitions, 5846 flow [2024-06-27 17:51:09,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:09,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:09,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:09,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 17:51:09,335 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:09,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:09,336 INFO L85 PathProgramCache]: Analyzing trace with hash -246337651, now seen corresponding path program 5 times [2024-06-27 17:51:09,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:09,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318241988] [2024-06-27 17:51:09,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:09,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:10,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:10,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318241988] [2024-06-27 17:51:10,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318241988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:10,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:10,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:10,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383227956] [2024-06-27 17:51:10,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:10,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:10,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:10,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:10,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:10,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:10,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 346 transitions, 5846 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:10,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:10,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:10,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:11,708 INFO L124 PetriNetUnfolderBase]: 1528/2691 cut-off events. [2024-06-27 17:51:11,708 INFO L125 PetriNetUnfolderBase]: For 83310/83310 co-relation queries the response was YES. [2024-06-27 17:51:11,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20719 conditions, 2691 events. 1528/2691 cut-off events. For 83310/83310 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 15689 event pairs, 378 based on Foata normal form. 2/2572 useless extension candidates. Maximal degree in co-relation 20582. Up to 2093 conditions per place. [2024-06-27 17:51:11,744 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 284 selfloop transitions, 80 changer transitions 0/371 dead transitions. [2024-06-27 17:51:11,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 371 transitions, 6886 flow [2024-06-27 17:51:11,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:11,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:11,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 17:51:11,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40789473684210525 [2024-06-27 17:51:11,746 INFO L175 Difference]: Start difference. First operand has 288 places, 346 transitions, 5846 flow. Second operand 10 states and 155 transitions. [2024-06-27 17:51:11,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 371 transitions, 6886 flow [2024-06-27 17:51:12,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 371 transitions, 6487 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 17:51:12,068 INFO L231 Difference]: Finished difference. Result has 291 places, 348 transitions, 5650 flow [2024-06-27 17:51:12,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5447, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5650, PETRI_PLACES=291, PETRI_TRANSITIONS=348} [2024-06-27 17:51:12,068 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-27 17:51:12,068 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 348 transitions, 5650 flow [2024-06-27 17:51:12,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:12,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:12,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:12,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 17:51:12,069 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:12,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:12,069 INFO L85 PathProgramCache]: Analyzing trace with hash -246614481, now seen corresponding path program 14 times [2024-06-27 17:51:12,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:12,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977201372] [2024-06-27 17:51:12,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:12,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:12,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:12,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977201372] [2024-06-27 17:51:12,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977201372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:12,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:12,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:12,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967595158] [2024-06-27 17:51:12,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:12,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:12,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:12,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:12,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:12,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:12,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 348 transitions, 5650 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:12,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:12,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:12,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:13,698 INFO L124 PetriNetUnfolderBase]: 1524/2679 cut-off events. [2024-06-27 17:51:13,698 INFO L125 PetriNetUnfolderBase]: For 77162/77162 co-relation queries the response was YES. [2024-06-27 17:51:13,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20000 conditions, 2679 events. 1524/2679 cut-off events. For 77162/77162 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 15499 event pairs, 296 based on Foata normal form. 2/2561 useless extension candidates. Maximal degree in co-relation 19863. Up to 2054 conditions per place. [2024-06-27 17:51:13,732 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 245 selfloop transitions, 117 changer transitions 0/369 dead transitions. [2024-06-27 17:51:13,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 369 transitions, 6520 flow [2024-06-27 17:51:13,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:13,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:13,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 17:51:13,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41228070175438597 [2024-06-27 17:51:13,734 INFO L175 Difference]: Start difference. First operand has 291 places, 348 transitions, 5650 flow. Second operand 9 states and 141 transitions. [2024-06-27 17:51:13,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 369 transitions, 6520 flow [2024-06-27 17:51:14,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 369 transitions, 6296 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:14,106 INFO L231 Difference]: Finished difference. Result has 292 places, 348 transitions, 5665 flow [2024-06-27 17:51:14,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5426, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5665, PETRI_PLACES=292, PETRI_TRANSITIONS=348} [2024-06-27 17:51:14,107 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-27 17:51:14,107 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 348 transitions, 5665 flow [2024-06-27 17:51:14,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:14,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:14,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:14,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 17:51:14,108 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:14,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:14,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1755311431, now seen corresponding path program 6 times [2024-06-27 17:51:14,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:14,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604857524] [2024-06-27 17:51:14,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:14,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:15,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:15,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604857524] [2024-06-27 17:51:15,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604857524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:15,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:15,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:15,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303241509] [2024-06-27 17:51:15,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:15,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:15,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:15,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:15,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:15,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:15,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 348 transitions, 5665 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:15,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:15,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:15,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:15,915 INFO L124 PetriNetUnfolderBase]: 1528/2691 cut-off events. [2024-06-27 17:51:15,916 INFO L125 PetriNetUnfolderBase]: For 78456/78456 co-relation queries the response was YES. [2024-06-27 17:51:15,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20034 conditions, 2691 events. 1528/2691 cut-off events. For 78456/78456 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 15661 event pairs, 387 based on Foata normal form. 2/2571 useless extension candidates. Maximal degree in co-relation 19896. Up to 2397 conditions per place. [2024-06-27 17:51:15,948 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 320 selfloop transitions, 43 changer transitions 0/370 dead transitions. [2024-06-27 17:51:15,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 370 transitions, 6568 flow [2024-06-27 17:51:15,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:15,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-27 17:51:15,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38421052631578945 [2024-06-27 17:51:15,949 INFO L175 Difference]: Start difference. First operand has 292 places, 348 transitions, 5665 flow. Second operand 10 states and 146 transitions. [2024-06-27 17:51:15,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 370 transitions, 6568 flow [2024-06-27 17:51:16,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 370 transitions, 6329 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:16,288 INFO L231 Difference]: Finished difference. Result has 294 places, 350 transitions, 5559 flow [2024-06-27 17:51:16,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5426, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5559, PETRI_PLACES=294, PETRI_TRANSITIONS=350} [2024-06-27 17:51:16,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-27 17:51:16,288 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 350 transitions, 5559 flow [2024-06-27 17:51:16,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:16,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:16,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:16,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 17:51:16,289 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:16,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:16,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1762730382, now seen corresponding path program 3 times [2024-06-27 17:51:16,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:16,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475656595] [2024-06-27 17:51:16,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:16,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:17,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:17,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475656595] [2024-06-27 17:51:17,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475656595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:17,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:17,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:17,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123730773] [2024-06-27 17:51:17,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:17,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:17,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:17,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:17,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:17,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:17,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 350 transitions, 5559 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:17,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:17,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:17,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:18,415 INFO L124 PetriNetUnfolderBase]: 1526/2688 cut-off events. [2024-06-27 17:51:18,415 INFO L125 PetriNetUnfolderBase]: For 75723/75723 co-relation queries the response was YES. [2024-06-27 17:51:18,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19706 conditions, 2688 events. 1526/2688 cut-off events. For 75723/75723 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 15617 event pairs, 387 based on Foata normal form. 1/2567 useless extension candidates. Maximal degree in co-relation 19567. Up to 2391 conditions per place. [2024-06-27 17:51:18,446 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 318 selfloop transitions, 45 changer transitions 0/370 dead transitions. [2024-06-27 17:51:18,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 370 transitions, 6456 flow [2024-06-27 17:51:18,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:18,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:18,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-27 17:51:18,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391812865497076 [2024-06-27 17:51:18,448 INFO L175 Difference]: Start difference. First operand has 294 places, 350 transitions, 5559 flow. Second operand 9 states and 134 transitions. [2024-06-27 17:51:18,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 370 transitions, 6456 flow [2024-06-27 17:51:18,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 370 transitions, 6351 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:18,832 INFO L231 Difference]: Finished difference. Result has 295 places, 352 transitions, 5596 flow [2024-06-27 17:51:18,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5454, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5596, PETRI_PLACES=295, PETRI_TRANSITIONS=352} [2024-06-27 17:51:18,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-27 17:51:18,836 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 352 transitions, 5596 flow [2024-06-27 17:51:18,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:18,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:18,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:18,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 17:51:18,836 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:18,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:18,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1807178661, now seen corresponding path program 1 times [2024-06-27 17:51:18,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:18,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966246796] [2024-06-27 17:51:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:18,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:19,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:19,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966246796] [2024-06-27 17:51:19,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966246796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:19,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:19,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:51:19,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795416883] [2024-06-27 17:51:19,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:19,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:51:19,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:19,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:51:19,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:51:19,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:19,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 352 transitions, 5596 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:19,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:19,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:19,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:20,695 INFO L124 PetriNetUnfolderBase]: 1542/2709 cut-off events. [2024-06-27 17:51:20,695 INFO L125 PetriNetUnfolderBase]: For 78504/78504 co-relation queries the response was YES. [2024-06-27 17:51:20,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19983 conditions, 2709 events. 1542/2709 cut-off events. For 78504/78504 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 15656 event pairs, 347 based on Foata normal form. 2/2596 useless extension candidates. Maximal degree in co-relation 19843. Up to 2400 conditions per place. [2024-06-27 17:51:20,728 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 321 selfloop transitions, 50 changer transitions 0/378 dead transitions. [2024-06-27 17:51:20,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 378 transitions, 6542 flow [2024-06-27 17:51:20,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:20,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:20,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 17:51:20,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40789473684210525 [2024-06-27 17:51:20,730 INFO L175 Difference]: Start difference. First operand has 295 places, 352 transitions, 5596 flow. Second operand 10 states and 155 transitions. [2024-06-27 17:51:20,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 378 transitions, 6542 flow [2024-06-27 17:51:21,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 378 transitions, 6430 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 17:51:21,099 INFO L231 Difference]: Finished difference. Result has 298 places, 354 transitions, 5666 flow [2024-06-27 17:51:21,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5484, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5666, PETRI_PLACES=298, PETRI_TRANSITIONS=354} [2024-06-27 17:51:21,100 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-27 17:51:21,100 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 354 transitions, 5666 flow [2024-06-27 17:51:21,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:21,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:21,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:21,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 17:51:21,101 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:21,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:21,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1728654729, now seen corresponding path program 2 times [2024-06-27 17:51:21,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:21,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409986548] [2024-06-27 17:51:21,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:21,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:21,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:21,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409986548] [2024-06-27 17:51:21,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409986548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:21,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:21,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:51:21,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461224407] [2024-06-27 17:51:21,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:21,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:51:21,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:21,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:51:21,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:51:21,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-06-27 17:51:21,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 354 transitions, 5666 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:21,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:21,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-06-27 17:51:21,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:22,606 INFO L124 PetriNetUnfolderBase]: 1684/2985 cut-off events. [2024-06-27 17:51:22,606 INFO L125 PetriNetUnfolderBase]: For 88029/88037 co-relation queries the response was YES. [2024-06-27 17:51:22,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22179 conditions, 2985 events. 1684/2985 cut-off events. For 88029/88037 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 18084 event pairs, 318 based on Foata normal form. 8/2855 useless extension candidates. Maximal degree in co-relation 22038. Up to 2426 conditions per place. [2024-06-27 17:51:22,641 INFO L140 encePairwiseOnDemand]: 24/38 looper letters, 286 selfloop transitions, 128 changer transitions 0/429 dead transitions. [2024-06-27 17:51:22,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 429 transitions, 7667 flow [2024-06-27 17:51:22,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:22,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:22,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 17:51:22,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44473684210526315 [2024-06-27 17:51:22,642 INFO L175 Difference]: Start difference. First operand has 298 places, 354 transitions, 5666 flow. Second operand 10 states and 169 transitions. [2024-06-27 17:51:22,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 429 transitions, 7667 flow [2024-06-27 17:51:23,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 429 transitions, 7458 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-27 17:51:23,021 INFO L231 Difference]: Finished difference. Result has 305 places, 402 transitions, 6932 flow [2024-06-27 17:51:23,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5492, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6932, PETRI_PLACES=305, PETRI_TRANSITIONS=402} [2024-06-27 17:51:23,022 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-27 17:51:23,022 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 402 transitions, 6932 flow [2024-06-27 17:51:23,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:23,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:23,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:23,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 17:51:23,022 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:23,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:23,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1268164481, now seen corresponding path program 3 times [2024-06-27 17:51:23,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:23,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239482499] [2024-06-27 17:51:23,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:23,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:24,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:24,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239482499] [2024-06-27 17:51:24,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239482499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:24,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:24,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:51:24,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540779156] [2024-06-27 17:51:24,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:24,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:51:24,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:24,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:51:24,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:51:24,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:24,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 402 transitions, 6932 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:24,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:24,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:24,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:25,102 INFO L124 PetriNetUnfolderBase]: 1722/3036 cut-off events. [2024-06-27 17:51:25,102 INFO L125 PetriNetUnfolderBase]: For 93046/93046 co-relation queries the response was YES. [2024-06-27 17:51:25,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23869 conditions, 3036 events. 1722/3036 cut-off events. For 93046/93046 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 18280 event pairs, 364 based on Foata normal form. 2/2914 useless extension candidates. Maximal degree in co-relation 23721. Up to 2629 conditions per place. [2024-06-27 17:51:25,143 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 366 selfloop transitions, 62 changer transitions 0/435 dead transitions. [2024-06-27 17:51:25,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 435 transitions, 8117 flow [2024-06-27 17:51:25,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:25,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:25,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-27 17:51:25,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105263157894737 [2024-06-27 17:51:25,144 INFO L175 Difference]: Start difference. First operand has 305 places, 402 transitions, 6932 flow. Second operand 10 states and 156 transitions. [2024-06-27 17:51:25,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 435 transitions, 8117 flow [2024-06-27 17:51:25,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 435 transitions, 7897 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:25,626 INFO L231 Difference]: Finished difference. Result has 312 places, 410 transitions, 7057 flow [2024-06-27 17:51:25,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=6725, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7057, PETRI_PLACES=312, PETRI_TRANSITIONS=410} [2024-06-27 17:51:25,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-27 17:51:25,627 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 410 transitions, 7057 flow [2024-06-27 17:51:25,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:25,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:25,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:25,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 17:51:25,627 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:25,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:25,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1726776129, now seen corresponding path program 4 times [2024-06-27 17:51:25,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:25,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641582440] [2024-06-27 17:51:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:25,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:26,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:26,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641582440] [2024-06-27 17:51:26,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641582440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:26,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:26,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:51:26,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692219736] [2024-06-27 17:51:26,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:26,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:51:26,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:26,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:51:26,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:51:26,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-06-27 17:51:26,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 410 transitions, 7057 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:26,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:26,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-06-27 17:51:26,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:27,203 INFO L124 PetriNetUnfolderBase]: 1761/3116 cut-off events. [2024-06-27 17:51:27,204 INFO L125 PetriNetUnfolderBase]: For 100024/100028 co-relation queries the response was YES. [2024-06-27 17:51:27,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24510 conditions, 3116 events. 1761/3116 cut-off events. For 100024/100028 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 18993 event pairs, 348 based on Foata normal form. 5/2983 useless extension candidates. Maximal degree in co-relation 24361. Up to 2598 conditions per place. [2024-06-27 17:51:27,240 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 294 selfloop transitions, 143 changer transitions 0/452 dead transitions. [2024-06-27 17:51:27,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 452 transitions, 8599 flow [2024-06-27 17:51:27,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:27,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:27,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-27 17:51:27,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4368421052631579 [2024-06-27 17:51:27,251 INFO L175 Difference]: Start difference. First operand has 312 places, 410 transitions, 7057 flow. Second operand 10 states and 166 transitions. [2024-06-27 17:51:27,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 452 transitions, 8599 flow [2024-06-27 17:51:27,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 452 transitions, 8409 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 17:51:27,711 INFO L231 Difference]: Finished difference. Result has 316 places, 430 transitions, 7694 flow [2024-06-27 17:51:27,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=6873, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7694, PETRI_PLACES=316, PETRI_TRANSITIONS=430} [2024-06-27 17:51:27,711 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-27 17:51:27,712 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 430 transitions, 7694 flow [2024-06-27 17:51:27,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:27,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:27,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:27,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 17:51:27,712 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:27,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:27,713 INFO L85 PathProgramCache]: Analyzing trace with hash 878243613, now seen corresponding path program 5 times [2024-06-27 17:51:27,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:27,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269575329] [2024-06-27 17:51:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:27,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:28,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:28,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269575329] [2024-06-27 17:51:28,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269575329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:28,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:28,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:51:28,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697522388] [2024-06-27 17:51:28,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:28,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:51:28,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:28,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:51:28,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:51:28,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-06-27 17:51:28,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 430 transitions, 7694 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:28,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:28,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-06-27 17:51:28,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:29,334 INFO L124 PetriNetUnfolderBase]: 1794/3176 cut-off events. [2024-06-27 17:51:29,335 INFO L125 PetriNetUnfolderBase]: For 103859/103863 co-relation queries the response was YES. [2024-06-27 17:51:29,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25200 conditions, 3176 events. 1794/3176 cut-off events. For 103859/103863 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 19471 event pairs, 383 based on Foata normal form. 5/3042 useless extension candidates. Maximal degree in co-relation 25049. Up to 2704 conditions per place. [2024-06-27 17:51:29,377 INFO L140 encePairwiseOnDemand]: 24/38 looper letters, 317 selfloop transitions, 127 changer transitions 0/459 dead transitions. [2024-06-27 17:51:29,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 459 transitions, 8888 flow [2024-06-27 17:51:29,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:29,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:29,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-27 17:51:29,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342105263157895 [2024-06-27 17:51:29,380 INFO L175 Difference]: Start difference. First operand has 316 places, 430 transitions, 7694 flow. Second operand 10 states and 165 transitions. [2024-06-27 17:51:29,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 459 transitions, 8888 flow [2024-06-27 17:51:29,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 459 transitions, 8590 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:29,983 INFO L231 Difference]: Finished difference. Result has 322 places, 437 transitions, 7806 flow [2024-06-27 17:51:29,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=7396, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7806, PETRI_PLACES=322, PETRI_TRANSITIONS=437} [2024-06-27 17:51:29,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-27 17:51:29,984 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 437 transitions, 7806 flow [2024-06-27 17:51:29,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:29,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:29,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:29,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 17:51:29,989 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:29,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:29,989 INFO L85 PathProgramCache]: Analyzing trace with hash 536621091, now seen corresponding path program 6 times [2024-06-27 17:51:29,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:29,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081967285] [2024-06-27 17:51:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:29,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:30,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:30,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081967285] [2024-06-27 17:51:30,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081967285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:30,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:30,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:30,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479349040] [2024-06-27 17:51:30,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:30,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:30,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:30,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:30,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:30,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:30,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 437 transitions, 7806 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:30,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:30,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:30,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:31,669 INFO L124 PetriNetUnfolderBase]: 1832/3236 cut-off events. [2024-06-27 17:51:31,669 INFO L125 PetriNetUnfolderBase]: For 108628/108628 co-relation queries the response was YES. [2024-06-27 17:51:31,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25666 conditions, 3236 events. 1832/3236 cut-off events. For 108628/108628 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 19897 event pairs, 293 based on Foata normal form. 2/3104 useless extension candidates. Maximal degree in co-relation 25513. Up to 2457 conditions per place. [2024-06-27 17:51:31,713 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 323 selfloop transitions, 150 changer transitions 0/480 dead transitions. [2024-06-27 17:51:31,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 480 transitions, 9206 flow [2024-06-27 17:51:31,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:31,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:31,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 17:51:31,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4327485380116959 [2024-06-27 17:51:31,714 INFO L175 Difference]: Start difference. First operand has 322 places, 437 transitions, 7806 flow. Second operand 9 states and 148 transitions. [2024-06-27 17:51:31,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 480 transitions, 9206 flow [2024-06-27 17:51:32,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 480 transitions, 8880 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:32,253 INFO L231 Difference]: Finished difference. Result has 325 places, 453 transitions, 8174 flow [2024-06-27 17:51:32,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=7482, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8174, PETRI_PLACES=325, PETRI_TRANSITIONS=453} [2024-06-27 17:51:32,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-27 17:51:32,254 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 453 transitions, 8174 flow [2024-06-27 17:51:32,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:32,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:32,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:32,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 17:51:32,254 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:32,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:32,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2066524701, now seen corresponding path program 7 times [2024-06-27 17:51:32,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:32,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010819633] [2024-06-27 17:51:32,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:32,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:33,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:33,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010819633] [2024-06-27 17:51:33,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010819633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:33,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:33,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:33,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688988777] [2024-06-27 17:51:33,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:33,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:33,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:33,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:33,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:33,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:33,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 453 transitions, 8174 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:33,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:33,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:33,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:34,146 INFO L124 PetriNetUnfolderBase]: 1868/3298 cut-off events. [2024-06-27 17:51:34,147 INFO L125 PetriNetUnfolderBase]: For 114363/114363 co-relation queries the response was YES. [2024-06-27 17:51:34,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26628 conditions, 3298 events. 1868/3298 cut-off events. For 114363/114363 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20305 event pairs, 383 based on Foata normal form. 2/3165 useless extension candidates. Maximal degree in co-relation 26473. Up to 2696 conditions per place. [2024-06-27 17:51:34,190 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 331 selfloop transitions, 146 changer transitions 0/484 dead transitions. [2024-06-27 17:51:34,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 484 transitions, 9441 flow [2024-06-27 17:51:34,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:34,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:34,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 17:51:34,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4327485380116959 [2024-06-27 17:51:34,192 INFO L175 Difference]: Start difference. First operand has 325 places, 453 transitions, 8174 flow. Second operand 9 states and 148 transitions. [2024-06-27 17:51:34,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 484 transitions, 9441 flow [2024-06-27 17:51:34,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 484 transitions, 9096 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:34,761 INFO L231 Difference]: Finished difference. Result has 329 places, 459 transitions, 8269 flow [2024-06-27 17:51:34,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=7833, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8269, PETRI_PLACES=329, PETRI_TRANSITIONS=459} [2024-06-27 17:51:34,762 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-27 17:51:34,762 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 459 transitions, 8269 flow [2024-06-27 17:51:34,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:34,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:34,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:34,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 17:51:34,763 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:34,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:34,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1449112429, now seen corresponding path program 8 times [2024-06-27 17:51:34,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:34,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650219347] [2024-06-27 17:51:34,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:34,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:35,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:35,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650219347] [2024-06-27 17:51:35,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650219347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:35,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:35,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:35,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261854681] [2024-06-27 17:51:35,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:35,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:35,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:35,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:35,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:35,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:35,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 459 transitions, 8269 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:35,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:35,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:35,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:36,455 INFO L124 PetriNetUnfolderBase]: 1920/3394 cut-off events. [2024-06-27 17:51:36,455 INFO L125 PetriNetUnfolderBase]: For 114885/114885 co-relation queries the response was YES. [2024-06-27 17:51:36,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27075 conditions, 3394 events. 1920/3394 cut-off events. For 114885/114885 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 21050 event pairs, 383 based on Foata normal form. 2/3255 useless extension candidates. Maximal degree in co-relation 26920. Up to 2744 conditions per place. [2024-06-27 17:51:36,496 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 348 selfloop transitions, 140 changer transitions 0/495 dead transitions. [2024-06-27 17:51:36,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 495 transitions, 9614 flow [2024-06-27 17:51:36,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:36,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:36,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 17:51:36,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298245614035088 [2024-06-27 17:51:36,498 INFO L175 Difference]: Start difference. First operand has 329 places, 459 transitions, 8269 flow. Second operand 9 states and 147 transitions. [2024-06-27 17:51:36,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 495 transitions, 9614 flow [2024-06-27 17:51:37,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 495 transitions, 9305 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:37,041 INFO L231 Difference]: Finished difference. Result has 333 places, 470 transitions, 8502 flow [2024-06-27 17:51:37,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=7964, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8502, PETRI_PLACES=333, PETRI_TRANSITIONS=470} [2024-06-27 17:51:37,042 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-27 17:51:37,042 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 470 transitions, 8502 flow [2024-06-27 17:51:37,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:37,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:37,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:37,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 17:51:37,043 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:37,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:37,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1979652967, now seen corresponding path program 1 times [2024-06-27 17:51:37,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:37,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239694888] [2024-06-27 17:51:37,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:37,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:38,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:38,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239694888] [2024-06-27 17:51:38,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239694888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:38,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:38,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:38,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900504350] [2024-06-27 17:51:38,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:38,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:38,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:38,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:38,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:38,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:38,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 470 transitions, 8502 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:38,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:38,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:38,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:39,422 INFO L124 PetriNetUnfolderBase]: 1931/3411 cut-off events. [2024-06-27 17:51:39,422 INFO L125 PetriNetUnfolderBase]: For 118046/118046 co-relation queries the response was YES. [2024-06-27 17:51:39,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27353 conditions, 3411 events. 1931/3411 cut-off events. For 118046/118046 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 21186 event pairs, 403 based on Foata normal form. 2/3269 useless extension candidates. Maximal degree in co-relation 27196. Up to 2725 conditions per place. [2024-06-27 17:51:39,466 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 337 selfloop transitions, 156 changer transitions 0/500 dead transitions. [2024-06-27 17:51:39,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 500 transitions, 9763 flow [2024-06-27 17:51:39,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:39,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-27 17:51:39,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42894736842105263 [2024-06-27 17:51:39,468 INFO L175 Difference]: Start difference. First operand has 333 places, 470 transitions, 8502 flow. Second operand 10 states and 163 transitions. [2024-06-27 17:51:39,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 500 transitions, 9763 flow [2024-06-27 17:51:40,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 500 transitions, 9462 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:40,076 INFO L231 Difference]: Finished difference. Result has 338 places, 472 transitions, 8587 flow [2024-06-27 17:51:40,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=8201, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8587, PETRI_PLACES=338, PETRI_TRANSITIONS=472} [2024-06-27 17:51:40,076 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-27 17:51:40,076 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 472 transitions, 8587 flow [2024-06-27 17:51:40,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:40,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:40,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:40,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 17:51:40,077 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:40,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:40,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1380178301, now seen corresponding path program 9 times [2024-06-27 17:51:40,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:40,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222725735] [2024-06-27 17:51:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:40,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:40,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:40,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:40,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222725735] [2024-06-27 17:51:40,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222725735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:40,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:40,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:40,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315319736] [2024-06-27 17:51:40,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:40,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:40,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:40,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:40,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:40,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:40,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 472 transitions, 8587 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:40,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:40,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:40,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:41,786 INFO L124 PetriNetUnfolderBase]: 1964/3468 cut-off events. [2024-06-27 17:51:41,786 INFO L125 PetriNetUnfolderBase]: For 118872/118872 co-relation queries the response was YES. [2024-06-27 17:51:41,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27694 conditions, 3468 events. 1964/3468 cut-off events. For 118872/118872 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 21651 event pairs, 224 based on Foata normal form. 2/3337 useless extension candidates. Maximal degree in co-relation 27536. Up to 2478 conditions per place. [2024-06-27 17:51:41,831 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 367 selfloop transitions, 157 changer transitions 0/531 dead transitions. [2024-06-27 17:51:41,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 531 transitions, 10263 flow [2024-06-27 17:51:41,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:41,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 17:51:41,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269005847953216 [2024-06-27 17:51:41,833 INFO L175 Difference]: Start difference. First operand has 338 places, 472 transitions, 8587 flow. Second operand 9 states and 146 transitions. [2024-06-27 17:51:41,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 531 transitions, 10263 flow [2024-06-27 17:51:42,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 531 transitions, 9823 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-27 17:51:42,566 INFO L231 Difference]: Finished difference. Result has 340 places, 504 transitions, 9071 flow [2024-06-27 17:51:42,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=8147, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9071, PETRI_PLACES=340, PETRI_TRANSITIONS=504} [2024-06-27 17:51:42,576 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-27 17:51:42,577 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 504 transitions, 9071 flow [2024-06-27 17:51:42,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:42,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:42,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:42,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 17:51:42,577 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:42,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:42,578 INFO L85 PathProgramCache]: Analyzing trace with hash -255427607, now seen corresponding path program 10 times [2024-06-27 17:51:42,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:42,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337765326] [2024-06-27 17:51:42,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:42,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:43,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:43,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337765326] [2024-06-27 17:51:43,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337765326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:43,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:43,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:51:43,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615788832] [2024-06-27 17:51:43,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:43,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:51:43,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:43,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:51:43,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:51:43,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:43,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 504 transitions, 9071 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:43,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:43,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:43,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:44,667 INFO L124 PetriNetUnfolderBase]: 2009/3545 cut-off events. [2024-06-27 17:51:44,667 INFO L125 PetriNetUnfolderBase]: For 127606/127606 co-relation queries the response was YES. [2024-06-27 17:51:44,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29113 conditions, 3545 events. 2009/3545 cut-off events. For 127606/127606 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 22194 event pairs, 390 based on Foata normal form. 2/3402 useless extension candidates. Maximal degree in co-relation 28951. Up to 3017 conditions per place. [2024-06-27 17:51:44,715 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 455 selfloop transitions, 91 changer transitions 0/553 dead transitions. [2024-06-27 17:51:44,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 553 transitions, 10799 flow [2024-06-27 17:51:44,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:51:44,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:51:44,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-06-27 17:51:44,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41148325358851673 [2024-06-27 17:51:44,717 INFO L175 Difference]: Start difference. First operand has 340 places, 504 transitions, 9071 flow. Second operand 11 states and 172 transitions. [2024-06-27 17:51:44,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 553 transitions, 10799 flow [2024-06-27 17:51:45,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 553 transitions, 10377 flow, removed 167 selfloop flow, removed 3 redundant places. [2024-06-27 17:51:45,368 INFO L231 Difference]: Finished difference. Result has 350 places, 522 transitions, 9368 flow [2024-06-27 17:51:45,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=8817, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9368, PETRI_PLACES=350, PETRI_TRANSITIONS=522} [2024-06-27 17:51:45,369 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-27 17:51:45,369 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 522 transitions, 9368 flow [2024-06-27 17:51:45,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:45,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:45,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:45,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 17:51:45,369 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:45,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:45,370 INFO L85 PathProgramCache]: Analyzing trace with hash -711153735, now seen corresponding path program 1 times [2024-06-27 17:51:45,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:45,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556483572] [2024-06-27 17:51:45,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:45,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:46,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:46,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556483572] [2024-06-27 17:51:46,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556483572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:46,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:46,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:51:46,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935412503] [2024-06-27 17:51:46,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:46,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:51:46,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:46,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:51:46,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:51:46,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:46,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 522 transitions, 9368 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:46,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:46,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:46,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:47,483 INFO L124 PetriNetUnfolderBase]: 2017/3557 cut-off events. [2024-06-27 17:51:47,483 INFO L125 PetriNetUnfolderBase]: For 122892/122892 co-relation queries the response was YES. [2024-06-27 17:51:47,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29213 conditions, 3557 events. 2017/3557 cut-off events. For 122892/122892 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 22272 event pairs, 463 based on Foata normal form. 1/3411 useless extension candidates. Maximal degree in co-relation 29047. Up to 3176 conditions per place. [2024-06-27 17:51:47,533 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 468 selfloop transitions, 73 changer transitions 0/548 dead transitions. [2024-06-27 17:51:47,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 548 transitions, 10683 flow [2024-06-27 17:51:47,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:47,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-27 17:51:47,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026315789473684 [2024-06-27 17:51:47,534 INFO L175 Difference]: Start difference. First operand has 350 places, 522 transitions, 9368 flow. Second operand 10 states and 153 transitions. [2024-06-27 17:51:47,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 548 transitions, 10683 flow [2024-06-27 17:51:48,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 548 transitions, 10483 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:48,256 INFO L231 Difference]: Finished difference. Result has 354 places, 526 transitions, 9424 flow [2024-06-27 17:51:48,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=9168, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9424, PETRI_PLACES=354, PETRI_TRANSITIONS=526} [2024-06-27 17:51:48,257 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-27 17:51:48,257 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 526 transitions, 9424 flow [2024-06-27 17:51:48,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:48,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:48,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:48,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 17:51:48,258 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:48,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:48,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1570443173, now seen corresponding path program 2 times [2024-06-27 17:51:48,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:48,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737302083] [2024-06-27 17:51:48,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:48,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:49,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:49,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737302083] [2024-06-27 17:51:49,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737302083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:49,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:49,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:51:49,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679831077] [2024-06-27 17:51:49,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:49,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:51:49,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:49,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:51:49,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:51:49,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:49,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 526 transitions, 9424 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:49,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:49,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:49,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:50,464 INFO L124 PetriNetUnfolderBase]: 2031/3579 cut-off events. [2024-06-27 17:51:50,465 INFO L125 PetriNetUnfolderBase]: For 124720/124720 co-relation queries the response was YES. [2024-06-27 17:51:50,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29369 conditions, 3579 events. 2031/3579 cut-off events. For 124720/124720 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22402 event pairs, 463 based on Foata normal form. 2/3432 useless extension candidates. Maximal degree in co-relation 29201. Up to 3207 conditions per place. [2024-06-27 17:51:50,516 INFO L140 encePairwiseOnDemand]: 24/38 looper letters, 482 selfloop transitions, 66 changer transitions 0/555 dead transitions. [2024-06-27 17:51:50,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 555 transitions, 10771 flow [2024-06-27 17:51:50,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:51:50,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:51:50,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-27 17:51:50,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39712918660287083 [2024-06-27 17:51:50,518 INFO L175 Difference]: Start difference. First operand has 354 places, 526 transitions, 9424 flow. Second operand 11 states and 166 transitions. [2024-06-27 17:51:50,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 555 transitions, 10771 flow [2024-06-27 17:51:51,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 555 transitions, 10595 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:51,277 INFO L231 Difference]: Finished difference. Result has 357 places, 530 transitions, 9472 flow [2024-06-27 17:51:51,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=9248, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9472, PETRI_PLACES=357, PETRI_TRANSITIONS=530} [2024-06-27 17:51:51,278 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-27 17:51:51,278 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 530 transitions, 9472 flow [2024-06-27 17:51:51,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:51,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:51,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:51,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 17:51:51,279 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:51,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:51,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1425419593, now seen corresponding path program 1 times [2024-06-27 17:51:51,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:51,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134000032] [2024-06-27 17:51:51,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:51,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:52,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:52,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134000032] [2024-06-27 17:51:52,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134000032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:52,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:52,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:51:52,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485055212] [2024-06-27 17:51:52,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:52,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:51:52,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:52,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:51:52,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:51:52,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:52,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 530 transitions, 9472 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:52,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:52,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:52,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:53,868 INFO L124 PetriNetUnfolderBase]: 2037/3599 cut-off events. [2024-06-27 17:51:53,869 INFO L125 PetriNetUnfolderBase]: For 126026/126026 co-relation queries the response was YES. [2024-06-27 17:51:53,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29503 conditions, 3599 events. 2037/3599 cut-off events. For 126026/126026 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22706 event pairs, 596 based on Foata normal form. 1/3453 useless extension candidates. Maximal degree in co-relation 29334. Up to 3228 conditions per place. [2024-06-27 17:51:53,922 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 477 selfloop transitions, 74 changer transitions 0/558 dead transitions. [2024-06-27 17:51:53,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 558 transitions, 10823 flow [2024-06-27 17:51:53,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:51:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:51:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 164 transitions. [2024-06-27 17:51:53,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3923444976076555 [2024-06-27 17:51:53,936 INFO L175 Difference]: Start difference. First operand has 357 places, 530 transitions, 9472 flow. Second operand 11 states and 164 transitions. [2024-06-27 17:51:53,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 558 transitions, 10823 flow [2024-06-27 17:51:54,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 558 transitions, 10659 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:54,626 INFO L231 Difference]: Finished difference. Result has 360 places, 532 transitions, 9512 flow [2024-06-27 17:51:54,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=9308, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9512, PETRI_PLACES=360, PETRI_TRANSITIONS=532} [2024-06-27 17:51:54,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-27 17:51:54,627 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 532 transitions, 9512 flow [2024-06-27 17:51:54,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:54,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:54,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:54,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 17:51:54,628 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:54,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:54,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1073961785, now seen corresponding path program 1 times [2024-06-27 17:51:54,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:54,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936109122] [2024-06-27 17:51:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:54,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:55,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:55,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936109122] [2024-06-27 17:51:55,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936109122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:55,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:55,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:55,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077229864] [2024-06-27 17:51:55,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:55,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:55,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:55,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:55,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:55,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:55,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 532 transitions, 9512 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:55,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:55,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:55,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:57,098 INFO L124 PetriNetUnfolderBase]: 2069/3662 cut-off events. [2024-06-27 17:51:57,098 INFO L125 PetriNetUnfolderBase]: For 139250/139250 co-relation queries the response was YES. [2024-06-27 17:51:57,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29896 conditions, 3662 events. 2069/3662 cut-off events. For 139250/139250 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23299 event pairs, 523 based on Foata normal form. 4/3516 useless extension candidates. Maximal degree in co-relation 29726. Up to 3269 conditions per place. [2024-06-27 17:51:57,146 INFO L140 encePairwiseOnDemand]: 23/38 looper letters, 497 selfloop transitions, 62 changer transitions 0/566 dead transitions. [2024-06-27 17:51:57,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 566 transitions, 10971 flow [2024-06-27 17:51:57,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:51:57,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:51:57,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 178 transitions. [2024-06-27 17:51:57,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39035087719298245 [2024-06-27 17:51:57,148 INFO L175 Difference]: Start difference. First operand has 360 places, 532 transitions, 9512 flow. Second operand 12 states and 178 transitions. [2024-06-27 17:51:57,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 566 transitions, 10971 flow [2024-06-27 17:51:57,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 566 transitions, 10791 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-27 17:51:57,797 INFO L231 Difference]: Finished difference. Result has 362 places, 534 transitions, 9543 flow [2024-06-27 17:51:57,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=9332, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9543, PETRI_PLACES=362, PETRI_TRANSITIONS=534} [2024-06-27 17:51:57,797 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-27 17:51:57,797 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 534 transitions, 9543 flow [2024-06-27 17:51:57,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:57,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:57,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:57,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 17:51:57,798 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:57,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:57,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1590863421, now seen corresponding path program 11 times [2024-06-27 17:51:57,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:57,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415544063] [2024-06-27 17:51:57,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:57,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:58,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:58,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415544063] [2024-06-27 17:51:58,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415544063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:58,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:58,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:58,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210576320] [2024-06-27 17:51:58,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:58,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:58,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:58,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:58,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:58,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:51:58,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 534 transitions, 9543 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:58,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:58,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:51:58,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:59,855 INFO L124 PetriNetUnfolderBase]: 2101/3715 cut-off events. [2024-06-27 17:51:59,856 INFO L125 PetriNetUnfolderBase]: For 137543/137543 co-relation queries the response was YES. [2024-06-27 17:51:59,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30445 conditions, 3715 events. 2101/3715 cut-off events. For 137543/137543 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 23499 event pairs, 529 based on Foata normal form. 2/3575 useless extension candidates. Maximal degree in co-relation 30274. Up to 3141 conditions per place. [2024-06-27 17:51:59,910 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 451 selfloop transitions, 105 changer transitions 0/563 dead transitions. [2024-06-27 17:51:59,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 563 transitions, 10982 flow [2024-06-27 17:51:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:59,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:59,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-27 17:51:59,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064327485380117 [2024-06-27 17:51:59,912 INFO L175 Difference]: Start difference. First operand has 362 places, 534 transitions, 9543 flow. Second operand 9 states and 139 transitions. [2024-06-27 17:51:59,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 563 transitions, 10982 flow [2024-06-27 17:52:00,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 563 transitions, 10835 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-27 17:52:00,647 INFO L231 Difference]: Finished difference. Result has 363 places, 538 transitions, 9761 flow [2024-06-27 17:52:00,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=9396, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9761, PETRI_PLACES=363, PETRI_TRANSITIONS=538} [2024-06-27 17:52:00,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-27 17:52:00,648 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 538 transitions, 9761 flow [2024-06-27 17:52:00,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:00,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:00,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:00,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 17:52:00,648 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:00,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:00,649 INFO L85 PathProgramCache]: Analyzing trace with hash -360417199, now seen corresponding path program 12 times [2024-06-27 17:52:00,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:00,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107501090] [2024-06-27 17:52:00,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:00,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:00,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:01,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:01,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107501090] [2024-06-27 17:52:01,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107501090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:01,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:01,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:01,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108642510] [2024-06-27 17:52:01,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:01,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:01,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:01,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:01,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:01,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:52:01,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 538 transitions, 9761 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:01,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:01,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:52:01,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:02,880 INFO L124 PetriNetUnfolderBase]: 2133/3768 cut-off events. [2024-06-27 17:52:02,881 INFO L125 PetriNetUnfolderBase]: For 144588/144588 co-relation queries the response was YES. [2024-06-27 17:52:02,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31176 conditions, 3768 events. 2133/3768 cut-off events. For 144588/144588 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 23923 event pairs, 504 based on Foata normal form. 2/3622 useless extension candidates. Maximal degree in co-relation 31003. Up to 3091 conditions per place. [2024-06-27 17:52:02,939 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 455 selfloop transitions, 111 changer transitions 0/573 dead transitions. [2024-06-27 17:52:02,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 573 transitions, 11297 flow [2024-06-27 17:52:02,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:52:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:52:02,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 17:52:02,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4093567251461988 [2024-06-27 17:52:02,940 INFO L175 Difference]: Start difference. First operand has 363 places, 538 transitions, 9761 flow. Second operand 9 states and 140 transitions. [2024-06-27 17:52:02,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 573 transitions, 11297 flow [2024-06-27 17:52:03,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 573 transitions, 10982 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-27 17:52:03,680 INFO L231 Difference]: Finished difference. Result has 365 places, 547 transitions, 9968 flow [2024-06-27 17:52:03,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=9454, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9968, PETRI_PLACES=365, PETRI_TRANSITIONS=547} [2024-06-27 17:52:03,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-27 17:52:03,681 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 547 transitions, 9968 flow [2024-06-27 17:52:03,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:03,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:03,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:03,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 17:52:03,682 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:03,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:03,682 INFO L85 PathProgramCache]: Analyzing trace with hash 696661431, now seen corresponding path program 13 times [2024-06-27 17:52:03,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:03,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995709316] [2024-06-27 17:52:03,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:03,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:04,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:04,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995709316] [2024-06-27 17:52:04,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995709316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:04,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:04,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:04,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669093045] [2024-06-27 17:52:04,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:04,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:04,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:04,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:04,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:04,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:52:04,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 547 transitions, 9968 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:04,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:04,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:52:04,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:05,923 INFO L124 PetriNetUnfolderBase]: 2149/3797 cut-off events. [2024-06-27 17:52:05,923 INFO L125 PetriNetUnfolderBase]: For 143872/143872 co-relation queries the response was YES. [2024-06-27 17:52:05,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31502 conditions, 3797 events. 2149/3797 cut-off events. For 143872/143872 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 24123 event pairs, 288 based on Foata normal form. 2/3665 useless extension candidates. Maximal degree in co-relation 31327. Up to 2808 conditions per place. [2024-06-27 17:52:05,984 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 413 selfloop transitions, 167 changer transitions 0/587 dead transitions. [2024-06-27 17:52:05,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 587 transitions, 11592 flow [2024-06-27 17:52:05,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:05,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:05,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 17:52:05,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40789473684210525 [2024-06-27 17:52:05,986 INFO L175 Difference]: Start difference. First operand has 365 places, 547 transitions, 9968 flow. Second operand 10 states and 155 transitions. [2024-06-27 17:52:05,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 587 transitions, 11592 flow [2024-06-27 17:52:06,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 587 transitions, 11333 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-27 17:52:06,817 INFO L231 Difference]: Finished difference. Result has 370 places, 555 transitions, 10379 flow [2024-06-27 17:52:06,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=9713, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10379, PETRI_PLACES=370, PETRI_TRANSITIONS=555} [2024-06-27 17:52:06,818 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-27 17:52:06,818 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 555 transitions, 10379 flow [2024-06-27 17:52:06,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:06,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:06,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:06,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 17:52:06,819 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:06,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:06,819 INFO L85 PathProgramCache]: Analyzing trace with hash 785232027, now seen corresponding path program 2 times [2024-06-27 17:52:06,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:06,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415528612] [2024-06-27 17:52:06,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:06,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:07,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:07,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415528612] [2024-06-27 17:52:07,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415528612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:07,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:07,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:07,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683673699] [2024-06-27 17:52:07,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:07,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:07,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:07,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:07,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:07,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:52:07,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 555 transitions, 10379 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:07,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:07,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:52:07,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:09,013 INFO L124 PetriNetUnfolderBase]: 2147/3798 cut-off events. [2024-06-27 17:52:09,013 INFO L125 PetriNetUnfolderBase]: For 138548/138548 co-relation queries the response was YES. [2024-06-27 17:52:09,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31843 conditions, 3798 events. 2147/3798 cut-off events. For 138548/138548 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24140 event pairs, 546 based on Foata normal form. 1/3650 useless extension candidates. Maximal degree in co-relation 31666. Up to 3278 conditions per place. [2024-06-27 17:52:09,066 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 464 selfloop transitions, 107 changer transitions 0/578 dead transitions. [2024-06-27 17:52:09,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 578 transitions, 11706 flow [2024-06-27 17:52:09,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:52:09,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:52:09,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-27 17:52:09,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40058479532163743 [2024-06-27 17:52:09,068 INFO L175 Difference]: Start difference. First operand has 370 places, 555 transitions, 10379 flow. Second operand 9 states and 137 transitions. [2024-06-27 17:52:09,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 578 transitions, 11706 flow [2024-06-27 17:52:09,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 578 transitions, 11473 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-27 17:52:09,952 INFO L231 Difference]: Finished difference. Result has 374 places, 555 transitions, 10389 flow [2024-06-27 17:52:09,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=10146, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10389, PETRI_PLACES=374, PETRI_TRANSITIONS=555} [2024-06-27 17:52:09,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-27 17:52:09,953 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 555 transitions, 10389 flow [2024-06-27 17:52:09,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:09,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:09,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:09,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 17:52:09,954 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:09,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:09,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1905780199, now seen corresponding path program 3 times [2024-06-27 17:52:09,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:09,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585407080] [2024-06-27 17:52:09,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:09,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:11,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:11,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585407080] [2024-06-27 17:52:11,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585407080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:11,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:11,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:11,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869549475] [2024-06-27 17:52:11,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:11,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:11,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:11,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:11,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:11,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:52:11,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 555 transitions, 10389 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:11,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:11,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:52:11,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:12,358 INFO L124 PetriNetUnfolderBase]: 2169/3833 cut-off events. [2024-06-27 17:52:12,358 INFO L125 PetriNetUnfolderBase]: For 133869/133869 co-relation queries the response was YES. [2024-06-27 17:52:12,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32016 conditions, 3833 events. 2169/3833 cut-off events. For 133869/133869 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 24396 event pairs, 548 based on Foata normal form. 2/3687 useless extension candidates. Maximal degree in co-relation 31837. Up to 3329 conditions per place. [2024-06-27 17:52:12,413 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 489 selfloop transitions, 89 changer transitions 0/585 dead transitions. [2024-06-27 17:52:12,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 585 transitions, 11842 flow [2024-06-27 17:52:12,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:12,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:12,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2024-06-27 17:52:12,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39473684210526316 [2024-06-27 17:52:12,414 INFO L175 Difference]: Start difference. First operand has 374 places, 555 transitions, 10389 flow. Second operand 10 states and 150 transitions. [2024-06-27 17:52:12,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 585 transitions, 11842 flow [2024-06-27 17:52:13,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 585 transitions, 11574 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 17:52:13,151 INFO L231 Difference]: Finished difference. Result has 376 places, 559 transitions, 10405 flow [2024-06-27 17:52:13,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=10121, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10405, PETRI_PLACES=376, PETRI_TRANSITIONS=559} [2024-06-27 17:52:13,152 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-27 17:52:13,152 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 559 transitions, 10405 flow [2024-06-27 17:52:13,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:13,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:13,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:13,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 17:52:13,153 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:13,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:13,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1145872947, now seen corresponding path program 14 times [2024-06-27 17:52:13,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:13,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948171778] [2024-06-27 17:52:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:13,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:13,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:13,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948171778] [2024-06-27 17:52:13,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948171778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:13,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:13,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:13,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621514985] [2024-06-27 17:52:13,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:13,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:13,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:13,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:13,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:14,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:52:14,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 559 transitions, 10405 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:14,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:14,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:52:14,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:15,309 INFO L124 PetriNetUnfolderBase]: 2201/3877 cut-off events. [2024-06-27 17:52:15,309 INFO L125 PetriNetUnfolderBase]: For 134909/134909 co-relation queries the response was YES. [2024-06-27 17:52:15,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32416 conditions, 3877 events. 2201/3877 cut-off events. For 134909/134909 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 24683 event pairs, 504 based on Foata normal form. 2/3724 useless extension candidates. Maximal degree in co-relation 32236. Up to 3356 conditions per place. [2024-06-27 17:52:15,363 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 465 selfloop transitions, 115 changer transitions 0/587 dead transitions. [2024-06-27 17:52:15,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 587 transitions, 11881 flow [2024-06-27 17:52:15,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:52:15,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:52:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 17:52:15,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152046783625731 [2024-06-27 17:52:15,365 INFO L175 Difference]: Start difference. First operand has 376 places, 559 transitions, 10405 flow. Second operand 9 states and 142 transitions. [2024-06-27 17:52:15,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 587 transitions, 11881 flow [2024-06-27 17:52:16,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 587 transitions, 11653 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-27 17:52:16,198 INFO L231 Difference]: Finished difference. Result has 377 places, 563 transitions, 10527 flow [2024-06-27 17:52:16,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=10177, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10527, PETRI_PLACES=377, PETRI_TRANSITIONS=563} [2024-06-27 17:52:16,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-27 17:52:16,201 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 563 transitions, 10527 flow [2024-06-27 17:52:16,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:16,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:16,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:16,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 17:52:16,202 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:16,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:16,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1145877597, now seen corresponding path program 15 times [2024-06-27 17:52:16,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:16,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560234349] [2024-06-27 17:52:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:16,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:17,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:17,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:17,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560234349] [2024-06-27 17:52:17,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560234349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:17,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:17,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:17,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984919861] [2024-06-27 17:52:17,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:17,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:17,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:17,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:17,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:17,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:52:17,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 563 transitions, 10527 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:17,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:17,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:52:17,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:18,728 INFO L124 PetriNetUnfolderBase]: 2285/4034 cut-off events. [2024-06-27 17:52:18,729 INFO L125 PetriNetUnfolderBase]: For 143029/143029 co-relation queries the response was YES. [2024-06-27 17:52:18,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33972 conditions, 4034 events. 2285/4034 cut-off events. For 143029/143029 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 26065 event pairs, 524 based on Foata normal form. 2/3871 useless extension candidates. Maximal degree in co-relation 33791. Up to 3474 conditions per place. [2024-06-27 17:52:18,786 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 489 selfloop transitions, 130 changer transitions 0/626 dead transitions. [2024-06-27 17:52:18,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 626 transitions, 12960 flow [2024-06-27 17:52:18,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:18,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 17:52:18,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41578947368421054 [2024-06-27 17:52:18,788 INFO L175 Difference]: Start difference. First operand has 377 places, 563 transitions, 10527 flow. Second operand 10 states and 158 transitions. [2024-06-27 17:52:18,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 626 transitions, 12960 flow [2024-06-27 17:52:19,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 626 transitions, 12608 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 17:52:19,628 INFO L231 Difference]: Finished difference. Result has 382 places, 595 transitions, 11440 flow [2024-06-27 17:52:19,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=10215, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11440, PETRI_PLACES=382, PETRI_TRANSITIONS=595} [2024-06-27 17:52:19,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-27 17:52:19,631 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 595 transitions, 11440 flow [2024-06-27 17:52:19,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:19,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:19,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:19,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 17:52:19,632 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:19,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:19,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1145693023, now seen corresponding path program 4 times [2024-06-27 17:52:19,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:19,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673765447] [2024-06-27 17:52:19,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:19,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:20,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:20,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673765447] [2024-06-27 17:52:20,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673765447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:20,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:20,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:20,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110976902] [2024-06-27 17:52:20,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:20,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:20,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:20,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:20,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:20,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:52:20,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 595 transitions, 11440 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:20,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:20,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:52:20,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:22,353 INFO L124 PetriNetUnfolderBase]: 2307/4065 cut-off events. [2024-06-27 17:52:22,353 INFO L125 PetriNetUnfolderBase]: For 144674/144674 co-relation queries the response was YES. [2024-06-27 17:52:22,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34256 conditions, 4065 events. 2307/4065 cut-off events. For 144674/144674 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 26191 event pairs, 517 based on Foata normal form. 2/3896 useless extension candidates. Maximal degree in co-relation 34072. Up to 3505 conditions per place. [2024-06-27 17:52:22,411 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 478 selfloop transitions, 139 changer transitions 0/624 dead transitions. [2024-06-27 17:52:22,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 624 transitions, 12976 flow [2024-06-27 17:52:22,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:22,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:22,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-27 17:52:22,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026315789473684 [2024-06-27 17:52:22,412 INFO L175 Difference]: Start difference. First operand has 382 places, 595 transitions, 11440 flow. Second operand 10 states and 153 transitions. [2024-06-27 17:52:22,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 624 transitions, 12976 flow [2024-06-27 17:52:23,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 624 transitions, 12724 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-27 17:52:23,338 INFO L231 Difference]: Finished difference. Result has 389 places, 599 transitions, 11566 flow [2024-06-27 17:52:23,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=11188, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11566, PETRI_PLACES=389, PETRI_TRANSITIONS=599} [2024-06-27 17:52:23,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-27 17:52:23,339 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 599 transitions, 11566 flow [2024-06-27 17:52:23,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:23,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:23,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:23,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 17:52:23,339 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:23,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:23,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1157877883, now seen corresponding path program 16 times [2024-06-27 17:52:23,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:23,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474850898] [2024-06-27 17:52:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:23,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:24,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:24,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:24,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474850898] [2024-06-27 17:52:24,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474850898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:24,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:24,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:24,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207522808] [2024-06-27 17:52:24,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:24,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:24,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:24,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:24,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:24,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:52:24,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 599 transitions, 11566 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:24,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:24,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:52:24,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:25,460 INFO L124 PetriNetUnfolderBase]: 2323/4094 cut-off events. [2024-06-27 17:52:25,461 INFO L125 PetriNetUnfolderBase]: For 149597/149597 co-relation queries the response was YES. [2024-06-27 17:52:25,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34521 conditions, 4094 events. 2323/4094 cut-off events. For 149597/149597 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 26437 event pairs, 483 based on Foata normal form. 2/3926 useless extension candidates. Maximal degree in co-relation 34335. Up to 3381 conditions per place. [2024-06-27 17:52:25,521 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 452 selfloop transitions, 169 changer transitions 0/628 dead transitions. [2024-06-27 17:52:25,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 628 transitions, 13154 flow [2024-06-27 17:52:25,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:52:25,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:52:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 17:52:25,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-06-27 17:52:25,522 INFO L175 Difference]: Start difference. First operand has 389 places, 599 transitions, 11566 flow. Second operand 9 states and 144 transitions. [2024-06-27 17:52:25,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 628 transitions, 13154 flow [2024-06-27 17:52:26,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 628 transitions, 12816 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-27 17:52:26,516 INFO L231 Difference]: Finished difference. Result has 389 places, 601 transitions, 11678 flow [2024-06-27 17:52:26,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=11228, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11678, PETRI_PLACES=389, PETRI_TRANSITIONS=601} [2024-06-27 17:52:26,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-27 17:52:26,517 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 601 transitions, 11678 flow [2024-06-27 17:52:26,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:26,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:26,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:26,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 17:52:26,517 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:26,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:26,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1139436913, now seen corresponding path program 5 times [2024-06-27 17:52:26,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:26,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156420647] [2024-06-27 17:52:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:26,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:27,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:27,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156420647] [2024-06-27 17:52:27,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156420647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:27,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:27,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:27,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404932238] [2024-06-27 17:52:27,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:27,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:27,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:27,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:27,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:27,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:52:27,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 601 transitions, 11678 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:27,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:27,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:52:27,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:29,114 INFO L124 PetriNetUnfolderBase]: 2345/4128 cut-off events. [2024-06-27 17:52:29,115 INFO L125 PetriNetUnfolderBase]: For 153074/153074 co-relation queries the response was YES. [2024-06-27 17:52:29,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34917 conditions, 4128 events. 2345/4128 cut-off events. For 153074/153074 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 26693 event pairs, 483 based on Foata normal form. 2/3956 useless extension candidates. Maximal degree in co-relation 34731. Up to 3399 conditions per place. [2024-06-27 17:52:29,175 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 453 selfloop transitions, 173 changer transitions 0/633 dead transitions. [2024-06-27 17:52:29,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 633 transitions, 13274 flow [2024-06-27 17:52:29,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:29,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:29,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 17:52:29,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40789473684210525 [2024-06-27 17:52:29,177 INFO L175 Difference]: Start difference. First operand has 389 places, 601 transitions, 11678 flow. Second operand 10 states and 155 transitions. [2024-06-27 17:52:29,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 633 transitions, 13274 flow [2024-06-27 17:52:30,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 633 transitions, 12842 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-27 17:52:30,151 INFO L231 Difference]: Finished difference. Result has 392 places, 605 transitions, 11700 flow [2024-06-27 17:52:30,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=11246, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11700, PETRI_PLACES=392, PETRI_TRANSITIONS=605} [2024-06-27 17:52:30,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-27 17:52:30,151 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 605 transitions, 11700 flow [2024-06-27 17:52:30,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:30,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:30,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:30,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 17:52:30,154 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:30,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:30,154 INFO L85 PathProgramCache]: Analyzing trace with hash 70966169, now seen corresponding path program 2 times [2024-06-27 17:52:30,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:30,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281852417] [2024-06-27 17:52:30,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:30,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:32,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:32,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281852417] [2024-06-27 17:52:32,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281852417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:32,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:32,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:32,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479129160] [2024-06-27 17:52:32,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:32,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:32,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:32,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:32,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:32,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:52:32,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 605 transitions, 11700 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:32,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:32,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:52:32,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:33,905 INFO L124 PetriNetUnfolderBase]: 2351/4147 cut-off events. [2024-06-27 17:52:33,906 INFO L125 PetriNetUnfolderBase]: For 151602/151602 co-relation queries the response was YES. [2024-06-27 17:52:33,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34851 conditions, 4147 events. 2351/4147 cut-off events. For 151602/151602 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 26961 event pairs, 659 based on Foata normal form. 1/3976 useless extension candidates. Maximal degree in co-relation 34664. Up to 3690 conditions per place. [2024-06-27 17:52:33,966 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 540 selfloop transitions, 86 changer transitions 0/633 dead transitions. [2024-06-27 17:52:33,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 633 transitions, 13231 flow [2024-06-27 17:52:33,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:33,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:33,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2024-06-27 17:52:33,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39210526315789473 [2024-06-27 17:52:33,968 INFO L175 Difference]: Start difference. First operand has 392 places, 605 transitions, 11700 flow. Second operand 10 states and 149 transitions. [2024-06-27 17:52:33,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 633 transitions, 13231 flow [2024-06-27 17:52:35,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 633 transitions, 12823 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 17:52:35,020 INFO L231 Difference]: Finished difference. Result has 394 places, 607 transitions, 11530 flow [2024-06-27 17:52:35,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=11292, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11530, PETRI_PLACES=394, PETRI_TRANSITIONS=607} [2024-06-27 17:52:35,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-27 17:52:35,021 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 607 transitions, 11530 flow [2024-06-27 17:52:35,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:35,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:35,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:35,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 17:52:35,021 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:35,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:35,022 INFO L85 PathProgramCache]: Analyzing trace with hash 70965859, now seen corresponding path program 6 times [2024-06-27 17:52:35,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:35,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650015607] [2024-06-27 17:52:35,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:35,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:36,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:36,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650015607] [2024-06-27 17:52:36,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650015607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:36,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:36,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:36,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129475546] [2024-06-27 17:52:36,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:36,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:36,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:36,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:36,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:36,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:52:36,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 607 transitions, 11530 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:36,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:36,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:52:36,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:38,072 INFO L124 PetriNetUnfolderBase]: 2388/4194 cut-off events. [2024-06-27 17:52:38,073 INFO L125 PetriNetUnfolderBase]: For 160424/160424 co-relation queries the response was YES. [2024-06-27 17:52:38,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35263 conditions, 4194 events. 2388/4194 cut-off events. For 160424/160424 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 27125 event pairs, 483 based on Foata normal form. 2/4018 useless extension candidates. Maximal degree in co-relation 35075. Up to 3133 conditions per place. [2024-06-27 17:52:38,134 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 416 selfloop transitions, 221 changer transitions 0/644 dead transitions. [2024-06-27 17:52:38,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 644 transitions, 13398 flow [2024-06-27 17:52:38,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:38,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-27 17:52:38,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-06-27 17:52:38,135 INFO L175 Difference]: Start difference. First operand has 394 places, 607 transitions, 11530 flow. Second operand 10 states and 160 transitions. [2024-06-27 17:52:38,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 644 transitions, 13398 flow [2024-06-27 17:52:39,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 644 transitions, 13198 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 17:52:39,110 INFO L231 Difference]: Finished difference. Result has 396 places, 613 transitions, 11962 flow [2024-06-27 17:52:39,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=11334, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11962, PETRI_PLACES=396, PETRI_TRANSITIONS=613} [2024-06-27 17:52:39,111 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 354 predicate places. [2024-06-27 17:52:39,111 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 613 transitions, 11962 flow [2024-06-27 17:52:39,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:39,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:39,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:39,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 17:52:39,112 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:39,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:39,112 INFO L85 PathProgramCache]: Analyzing trace with hash 70957489, now seen corresponding path program 7 times [2024-06-27 17:52:39,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:39,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189741831] [2024-06-27 17:52:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:39,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:40,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:40,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189741831] [2024-06-27 17:52:40,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189741831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:40,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:40,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:52:40,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19100869] [2024-06-27 17:52:40,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:40,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:52:40,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:40,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:52:40,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:52:40,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:52:40,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 613 transitions, 11962 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:40,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:40,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:52:40,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:41,907 INFO L124 PetriNetUnfolderBase]: 2438/4279 cut-off events. [2024-06-27 17:52:41,908 INFO L125 PetriNetUnfolderBase]: For 160997/160997 co-relation queries the response was YES. [2024-06-27 17:52:41,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36649 conditions, 4279 events. 2438/4279 cut-off events. For 160997/160997 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 27928 event pairs, 534 based on Foata normal form. 2/4087 useless extension candidates. Maximal degree in co-relation 36460. Up to 3593 conditions per place. [2024-06-27 17:52:41,971 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 501 selfloop transitions, 178 changer transitions 0/686 dead transitions. [2024-06-27 17:52:41,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 686 transitions, 14455 flow [2024-06-27 17:52:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:41,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 17:52:41,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43157894736842106 [2024-06-27 17:52:41,973 INFO L175 Difference]: Start difference. First operand has 396 places, 613 transitions, 11962 flow. Second operand 10 states and 164 transitions. [2024-06-27 17:52:41,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 686 transitions, 14455 flow [2024-06-27 17:52:43,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 686 transitions, 14044 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 17:52:43,178 INFO L231 Difference]: Finished difference. Result has 403 places, 651 transitions, 12904 flow [2024-06-27 17:52:43,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=11599, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12904, PETRI_PLACES=403, PETRI_TRANSITIONS=651} [2024-06-27 17:52:43,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-27 17:52:43,178 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 651 transitions, 12904 flow [2024-06-27 17:52:43,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:43,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:43,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:43,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 17:52:43,179 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:43,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:43,180 INFO L85 PathProgramCache]: Analyzing trace with hash -69364223, now seen corresponding path program 2 times [2024-06-27 17:52:43,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:43,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619361988] [2024-06-27 17:52:43,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:43,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:44,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:44,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619361988] [2024-06-27 17:52:44,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619361988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:44,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:44,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:44,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803386126] [2024-06-27 17:52:44,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:44,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:44,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:44,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:44,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:44,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:52:44,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 651 transitions, 12904 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:44,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:44,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:52:44,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:45,956 INFO L124 PetriNetUnfolderBase]: 2470/4351 cut-off events. [2024-06-27 17:52:45,957 INFO L125 PetriNetUnfolderBase]: For 171967/171967 co-relation queries the response was YES. [2024-06-27 17:52:46,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37486 conditions, 4351 events. 2470/4351 cut-off events. For 171967/171967 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 28689 event pairs, 613 based on Foata normal form. 4/4162 useless extension candidates. Maximal degree in co-relation 37292. Up to 3841 conditions per place. [2024-06-27 17:52:46,019 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 605 selfloop transitions, 72 changer transitions 0/684 dead transitions. [2024-06-27 17:52:46,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 684 transitions, 14614 flow [2024-06-27 17:52:46,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:52:46,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:52:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 164 transitions. [2024-06-27 17:52:46,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3923444976076555 [2024-06-27 17:52:46,020 INFO L175 Difference]: Start difference. First operand has 403 places, 651 transitions, 12904 flow. Second operand 11 states and 164 transitions. [2024-06-27 17:52:46,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 684 transitions, 14614 flow [2024-06-27 17:52:47,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 684 transitions, 14301 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 17:52:47,204 INFO L231 Difference]: Finished difference. Result has 409 places, 653 transitions, 12829 flow [2024-06-27 17:52:47,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=12591, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12829, PETRI_PLACES=409, PETRI_TRANSITIONS=653} [2024-06-27 17:52:47,205 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-27 17:52:47,205 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 653 transitions, 12829 flow [2024-06-27 17:52:47,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:47,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:47,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:47,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 17:52:47,205 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:47,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:47,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1434556675, now seen corresponding path program 17 times [2024-06-27 17:52:47,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:47,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007465809] [2024-06-27 17:52:47,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:47,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:48,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:48,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007465809] [2024-06-27 17:52:48,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007465809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:48,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:48,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:48,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324822940] [2024-06-27 17:52:48,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:48,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:48,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:48,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:48,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:48,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:52:48,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 653 transitions, 12829 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:48,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:48,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:52:48,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:49,748 INFO L124 PetriNetUnfolderBase]: 2486/4363 cut-off events. [2024-06-27 17:52:49,748 INFO L125 PetriNetUnfolderBase]: For 168014/168014 co-relation queries the response was YES. [2024-06-27 17:52:49,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37677 conditions, 4363 events. 2486/4363 cut-off events. For 168014/168014 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 28526 event pairs, 477 based on Foata normal form. 2/4166 useless extension candidates. Maximal degree in co-relation 37482. Up to 3580 conditions per place. [2024-06-27 17:52:49,814 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 484 selfloop transitions, 187 changer transitions 0/678 dead transitions. [2024-06-27 17:52:49,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 678 transitions, 14479 flow [2024-06-27 17:52:49,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:52:49,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:52:49,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 17:52:49,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41812865497076024 [2024-06-27 17:52:49,816 INFO L175 Difference]: Start difference. First operand has 409 places, 653 transitions, 12829 flow. Second operand 9 states and 143 transitions. [2024-06-27 17:52:49,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 678 transitions, 14479 flow [2024-06-27 17:52:50,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 678 transitions, 14269 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-27 17:52:50,857 INFO L231 Difference]: Finished difference. Result has 410 places, 655 transitions, 13108 flow [2024-06-27 17:52:50,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=12621, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13108, PETRI_PLACES=410, PETRI_TRANSITIONS=655} [2024-06-27 17:52:50,857 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-27 17:52:50,858 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 655 transitions, 13108 flow [2024-06-27 17:52:50,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:50,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:50,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:50,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 17:52:50,858 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:50,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:50,859 INFO L85 PathProgramCache]: Analyzing trace with hash 945125601, now seen corresponding path program 8 times [2024-06-27 17:52:50,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:50,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917463245] [2024-06-27 17:52:50,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:50,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:51,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:51,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917463245] [2024-06-27 17:52:51,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917463245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:51,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:51,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:51,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814232022] [2024-06-27 17:52:51,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:51,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:51,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:51,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:51,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:51,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:52:51,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 655 transitions, 13108 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:51,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:51,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:52:51,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:53,531 INFO L124 PetriNetUnfolderBase]: 2512/4403 cut-off events. [2024-06-27 17:52:53,531 INFO L125 PetriNetUnfolderBase]: For 177162/177162 co-relation queries the response was YES. [2024-06-27 17:52:53,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38506 conditions, 4403 events. 2512/4403 cut-off events. For 177162/177162 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 28820 event pairs, 477 based on Foata normal form. 2/4203 useless extension candidates. Maximal degree in co-relation 38310. Up to 3557 conditions per place. [2024-06-27 17:52:53,600 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 485 selfloop transitions, 195 changer transitions 0/687 dead transitions. [2024-06-27 17:52:53,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 687 transitions, 15010 flow [2024-06-27 17:52:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:53,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:53,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 17:52:53,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236842105263158 [2024-06-27 17:52:53,601 INFO L175 Difference]: Start difference. First operand has 410 places, 655 transitions, 13108 flow. Second operand 10 states and 161 transitions. [2024-06-27 17:52:53,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 687 transitions, 15010 flow [2024-06-27 17:52:54,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 687 transitions, 14539 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-27 17:52:54,891 INFO L231 Difference]: Finished difference. Result has 413 places, 659 transitions, 13188 flow [2024-06-27 17:52:54,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=12637, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13188, PETRI_PLACES=413, PETRI_TRANSITIONS=659} [2024-06-27 17:52:54,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-27 17:52:54,892 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 659 transitions, 13188 flow [2024-06-27 17:52:54,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:54,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:54,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:54,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 17:52:54,893 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:54,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:54,893 INFO L85 PathProgramCache]: Analyzing trace with hash 945117231, now seen corresponding path program 9 times [2024-06-27 17:52:54,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:54,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613801347] [2024-06-27 17:52:54,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:54,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:56,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:56,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:56,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613801347] [2024-06-27 17:52:56,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613801347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:56,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:56,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:56,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478473242] [2024-06-27 17:52:56,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:56,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:56,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:56,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:56,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:56,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:52:56,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 659 transitions, 13188 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:56,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:56,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:52:56,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:57,891 INFO L124 PetriNetUnfolderBase]: 2555/4468 cut-off events. [2024-06-27 17:52:57,891 INFO L125 PetriNetUnfolderBase]: For 194210/194210 co-relation queries the response was YES. [2024-06-27 17:52:57,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39436 conditions, 4468 events. 2555/4468 cut-off events. For 194210/194210 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 29273 event pairs, 520 based on Foata normal form. 2/4263 useless extension candidates. Maximal degree in co-relation 39239. Up to 2708 conditions per place. [2024-06-27 17:52:57,967 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 466 selfloop transitions, 220 changer transitions 0/693 dead transitions. [2024-06-27 17:52:57,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 693 transitions, 15302 flow [2024-06-27 17:52:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:57,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:57,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-27 17:52:57,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4368421052631579 [2024-06-27 17:52:57,968 INFO L175 Difference]: Start difference. First operand has 413 places, 659 transitions, 13188 flow. Second operand 10 states and 166 transitions. [2024-06-27 17:52:57,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 693 transitions, 15302 flow [2024-06-27 17:52:59,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 693 transitions, 14944 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 17:52:59,293 INFO L231 Difference]: Finished difference. Result has 418 places, 664 transitions, 13464 flow [2024-06-27 17:52:59,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=12842, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13464, PETRI_PLACES=418, PETRI_TRANSITIONS=664} [2024-06-27 17:52:59,294 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-27 17:52:59,294 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 664 transitions, 13464 flow [2024-06-27 17:52:59,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:59,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:59,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:59,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 17:52:59,295 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:52:59,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:59,295 INFO L85 PathProgramCache]: Analyzing trace with hash 944886591, now seen corresponding path program 10 times [2024-06-27 17:52:59,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:59,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880663208] [2024-06-27 17:52:59,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:59,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:00,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:00,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880663208] [2024-06-27 17:53:00,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880663208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:00,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:00,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:00,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811143108] [2024-06-27 17:53:00,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:00,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:00,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:00,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:00,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:00,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:53:00,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 664 transitions, 13464 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:00,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:00,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:53:00,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:01,785 INFO L124 PetriNetUnfolderBase]: 2551/4462 cut-off events. [2024-06-27 17:53:01,786 INFO L125 PetriNetUnfolderBase]: For 189318/189318 co-relation queries the response was YES. [2024-06-27 17:53:02,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39683 conditions, 4462 events. 2551/4462 cut-off events. For 189318/189318 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 29196 event pairs, 482 based on Foata normal form. 2/4257 useless extension candidates. Maximal degree in co-relation 39483. Up to 3671 conditions per place. [2024-06-27 17:53:02,052 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 492 selfloop transitions, 189 changer transitions 0/688 dead transitions. [2024-06-27 17:53:02,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 688 transitions, 15034 flow [2024-06-27 17:53:02,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:02,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-27 17:53:02,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4052631578947368 [2024-06-27 17:53:02,054 INFO L175 Difference]: Start difference. First operand has 418 places, 664 transitions, 13464 flow. Second operand 10 states and 154 transitions. [2024-06-27 17:53:02,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 688 transitions, 15034 flow [2024-06-27 17:53:03,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 688 transitions, 14505 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-27 17:53:03,362 INFO L231 Difference]: Finished difference. Result has 421 places, 664 transitions, 13318 flow [2024-06-27 17:53:03,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=12935, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13318, PETRI_PLACES=421, PETRI_TRANSITIONS=664} [2024-06-27 17:53:03,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-27 17:53:03,363 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 664 transitions, 13318 flow [2024-06-27 17:53:03,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:03,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:03,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:03,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 17:53:03,363 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:03,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:03,364 INFO L85 PathProgramCache]: Analyzing trace with hash 953468383, now seen corresponding path program 3 times [2024-06-27 17:53:03,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:03,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345508638] [2024-06-27 17:53:03,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:03,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:05,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:05,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345508638] [2024-06-27 17:53:05,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345508638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:05,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:05,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:05,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710934796] [2024-06-27 17:53:05,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:05,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:05,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:05,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:05,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:05,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:53:05,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 664 transitions, 13318 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:05,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:05,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:53:05,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:07,026 INFO L124 PetriNetUnfolderBase]: 2583/4533 cut-off events. [2024-06-27 17:53:07,027 INFO L125 PetriNetUnfolderBase]: For 195964/195964 co-relation queries the response was YES. [2024-06-27 17:53:07,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39877 conditions, 4533 events. 2583/4533 cut-off events. For 195964/195964 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 29988 event pairs, 633 based on Foata normal form. 4/4331 useless extension candidates. Maximal degree in co-relation 39677. Up to 3805 conditions per place. [2024-06-27 17:53:07,110 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 584 selfloop transitions, 105 changer transitions 0/696 dead transitions. [2024-06-27 17:53:07,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 696 transitions, 15201 flow [2024-06-27 17:53:07,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:53:07,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:53:07,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-27 17:53:07,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 17:53:07,111 INFO L175 Difference]: Start difference. First operand has 421 places, 664 transitions, 13318 flow. Second operand 11 states and 171 transitions. [2024-06-27 17:53:07,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 696 transitions, 15201 flow [2024-06-27 17:53:08,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 696 transitions, 14813 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 17:53:08,284 INFO L231 Difference]: Finished difference. Result has 423 places, 666 transitions, 13233 flow [2024-06-27 17:53:08,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=12930, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13233, PETRI_PLACES=423, PETRI_TRANSITIONS=666} [2024-06-27 17:53:08,284 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-27 17:53:08,284 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 666 transitions, 13233 flow [2024-06-27 17:53:08,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:08,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:08,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:08,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 17:53:08,285 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:08,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:08,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1613737391, now seen corresponding path program 18 times [2024-06-27 17:53:08,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:08,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463712998] [2024-06-27 17:53:08,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:08,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:09,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:09,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463712998] [2024-06-27 17:53:09,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463712998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:09,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:09,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:09,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455212113] [2024-06-27 17:53:09,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:09,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:09,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:09,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:09,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:09,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:53:09,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 666 transitions, 13233 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:09,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:09,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:53:09,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:10,786 INFO L124 PetriNetUnfolderBase]: 2599/4548 cut-off events. [2024-06-27 17:53:10,786 INFO L125 PetriNetUnfolderBase]: For 193627/193627 co-relation queries the response was YES. [2024-06-27 17:53:10,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40103 conditions, 4548 events. 2599/4548 cut-off events. For 193627/193627 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 29866 event pairs, 592 based on Foata normal form. 2/4342 useless extension candidates. Maximal degree in co-relation 39902. Up to 4033 conditions per place. [2024-06-27 17:53:10,860 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 558 selfloop transitions, 125 changer transitions 0/690 dead transitions. [2024-06-27 17:53:10,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 690 transitions, 14909 flow [2024-06-27 17:53:10,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:53:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:53:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 17:53:10,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4093567251461988 [2024-06-27 17:53:10,862 INFO L175 Difference]: Start difference. First operand has 423 places, 666 transitions, 13233 flow. Second operand 9 states and 140 transitions. [2024-06-27 17:53:10,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 690 transitions, 14909 flow [2024-06-27 17:53:12,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 690 transitions, 14688 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-27 17:53:12,138 INFO L231 Difference]: Finished difference. Result has 424 places, 668 transitions, 13381 flow [2024-06-27 17:53:12,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13012, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13381, PETRI_PLACES=424, PETRI_TRANSITIONS=668} [2024-06-27 17:53:12,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 382 predicate places. [2024-06-27 17:53:12,138 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 668 transitions, 13381 flow [2024-06-27 17:53:12,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:12,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:12,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:12,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 17:53:12,139 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:12,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:12,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2087910709, now seen corresponding path program 11 times [2024-06-27 17:53:12,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:12,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241374102] [2024-06-27 17:53:12,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:12,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:13,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:13,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241374102] [2024-06-27 17:53:13,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241374102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:13,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:13,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:13,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222960440] [2024-06-27 17:53:13,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:13,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:13,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:13,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:13,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:13,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:53:13,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 668 transitions, 13381 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:13,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:13,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:53:13,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:14,883 INFO L124 PetriNetUnfolderBase]: 2625/4588 cut-off events. [2024-06-27 17:53:14,884 INFO L125 PetriNetUnfolderBase]: For 206611/206611 co-relation queries the response was YES. [2024-06-27 17:53:14,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40720 conditions, 4588 events. 2625/4588 cut-off events. For 206611/206611 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 30192 event pairs, 482 based on Foata normal form. 2/4379 useless extension candidates. Maximal degree in co-relation 40518. Up to 2800 conditions per place. [2024-06-27 17:53:14,953 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 439 selfloop transitions, 257 changer transitions 0/703 dead transitions. [2024-06-27 17:53:14,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 703 transitions, 15695 flow [2024-06-27 17:53:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:14,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-27 17:53:14,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421052631578947 [2024-06-27 17:53:14,954 INFO L175 Difference]: Start difference. First operand has 424 places, 668 transitions, 13381 flow. Second operand 10 states and 168 transitions. [2024-06-27 17:53:14,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 703 transitions, 15695 flow [2024-06-27 17:53:16,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 703 transitions, 15285 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-27 17:53:16,210 INFO L231 Difference]: Finished difference. Result has 428 places, 672 transitions, 13660 flow [2024-06-27 17:53:16,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=12971, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13660, PETRI_PLACES=428, PETRI_TRANSITIONS=672} [2024-06-27 17:53:16,210 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-27 17:53:16,210 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 672 transitions, 13660 flow [2024-06-27 17:53:16,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:16,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:16,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:16,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 17:53:16,211 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:16,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:16,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1613732741, now seen corresponding path program 19 times [2024-06-27 17:53:16,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:16,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413093472] [2024-06-27 17:53:16,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:16,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:16,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:16,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413093472] [2024-06-27 17:53:16,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413093472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:16,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:16,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:16,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066839539] [2024-06-27 17:53:16,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:16,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:16,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:16,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:16,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:17,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:53:17,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 672 transitions, 13660 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:17,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:17,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:53:17,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:18,718 INFO L124 PetriNetUnfolderBase]: 2641/4617 cut-off events. [2024-06-27 17:53:18,718 INFO L125 PetriNetUnfolderBase]: For 211512/211512 co-relation queries the response was YES. [2024-06-27 17:53:18,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41452 conditions, 4617 events. 2641/4617 cut-off events. For 211512/211512 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 30461 event pairs, 589 based on Foata normal form. 2/4409 useless extension candidates. Maximal degree in co-relation 41248. Up to 4074 conditions per place. [2024-06-27 17:53:18,788 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 561 selfloop transitions, 129 changer transitions 0/697 dead transitions. [2024-06-27 17:53:18,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 697 transitions, 15346 flow [2024-06-27 17:53:18,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:53:18,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:53:18,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 17:53:18,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41228070175438597 [2024-06-27 17:53:18,789 INFO L175 Difference]: Start difference. First operand has 428 places, 672 transitions, 13660 flow. Second operand 9 states and 141 transitions. [2024-06-27 17:53:18,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 697 transitions, 15346 flow [2024-06-27 17:53:20,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 697 transitions, 14845 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:20,240 INFO L231 Difference]: Finished difference. Result has 431 places, 674 transitions, 13542 flow [2024-06-27 17:53:20,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13159, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13542, PETRI_PLACES=431, PETRI_TRANSITIONS=674} [2024-06-27 17:53:20,240 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-27 17:53:20,240 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 674 transitions, 13542 flow [2024-06-27 17:53:20,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:20,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:20,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:20,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 17:53:20,241 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:20,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:20,241 INFO L85 PathProgramCache]: Analyzing trace with hash 2087902339, now seen corresponding path program 12 times [2024-06-27 17:53:20,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:20,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366284562] [2024-06-27 17:53:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:20,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:21,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:21,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366284562] [2024-06-27 17:53:21,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366284562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:21,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:21,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:21,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143563877] [2024-06-27 17:53:21,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:21,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:21,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:21,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:21,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:21,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:53:21,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 674 transitions, 13542 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:21,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:21,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:53:21,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:22,938 INFO L124 PetriNetUnfolderBase]: 2637/4611 cut-off events. [2024-06-27 17:53:22,938 INFO L125 PetriNetUnfolderBase]: For 204963/204963 co-relation queries the response was YES. [2024-06-27 17:53:22,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40715 conditions, 4611 events. 2637/4611 cut-off events. For 204963/204963 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 30389 event pairs, 487 based on Foata normal form. 2/4401 useless extension candidates. Maximal degree in co-relation 40510. Up to 2827 conditions per place. [2024-06-27 17:53:23,010 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 439 selfloop transitions, 256 changer transitions 0/702 dead transitions. [2024-06-27 17:53:23,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 702 transitions, 15522 flow [2024-06-27 17:53:23,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:23,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:23,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-27 17:53:23,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342105263157895 [2024-06-27 17:53:23,012 INFO L175 Difference]: Start difference. First operand has 431 places, 674 transitions, 13542 flow. Second operand 10 states and 165 transitions. [2024-06-27 17:53:23,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 702 transitions, 15522 flow [2024-06-27 17:53:24,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 702 transitions, 14937 flow, removed 111 selfloop flow, removed 8 redundant places. [2024-06-27 17:53:24,292 INFO L231 Difference]: Finished difference. Result has 433 places, 674 transitions, 13474 flow [2024-06-27 17:53:24,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=12957, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13474, PETRI_PLACES=433, PETRI_TRANSITIONS=674} [2024-06-27 17:53:24,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-27 17:53:24,293 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 674 transitions, 13474 flow [2024-06-27 17:53:24,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:24,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:24,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:24,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 17:53:24,293 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:24,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:24,294 INFO L85 PathProgramCache]: Analyzing trace with hash 2088209921, now seen corresponding path program 4 times [2024-06-27 17:53:24,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:24,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643898833] [2024-06-27 17:53:24,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:24,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:25,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:25,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643898833] [2024-06-27 17:53:25,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643898833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:25,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:25,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:53:25,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428555650] [2024-06-27 17:53:25,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:25,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:53:25,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:25,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:53:25,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:53:25,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:53:25,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 674 transitions, 13474 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:25,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:25,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:53:25,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:26,869 INFO L124 PetriNetUnfolderBase]: 2669/4682 cut-off events. [2024-06-27 17:53:26,870 INFO L125 PetriNetUnfolderBase]: For 216434/216434 co-relation queries the response was YES. [2024-06-27 17:53:26,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40898 conditions, 4682 events. 2669/4682 cut-off events. For 216434/216434 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 31206 event pairs, 619 based on Foata normal form. 4/4475 useless extension candidates. Maximal degree in co-relation 40693. Up to 3951 conditions per place. [2024-06-27 17:53:26,941 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 583 selfloop transitions, 113 changer transitions 0/703 dead transitions. [2024-06-27 17:53:26,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 703 transitions, 15363 flow [2024-06-27 17:53:26,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:26,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:26,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 17:53:26,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41578947368421054 [2024-06-27 17:53:26,942 INFO L175 Difference]: Start difference. First operand has 433 places, 674 transitions, 13474 flow. Second operand 10 states and 158 transitions. [2024-06-27 17:53:26,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 703 transitions, 15363 flow [2024-06-27 17:53:28,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 703 transitions, 14830 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 17:53:28,196 INFO L231 Difference]: Finished difference. Result has 433 places, 676 transitions, 13268 flow [2024-06-27 17:53:28,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=12941, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13268, PETRI_PLACES=433, PETRI_TRANSITIONS=676} [2024-06-27 17:53:28,197 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-27 17:53:28,197 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 676 transitions, 13268 flow [2024-06-27 17:53:28,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:28,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:28,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:28,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 17:53:28,198 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:28,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:28,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1620166481, now seen corresponding path program 20 times [2024-06-27 17:53:28,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:28,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559584235] [2024-06-27 17:53:28,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:28,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:29,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:29,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559584235] [2024-06-27 17:53:29,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559584235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:29,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:29,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:29,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321781666] [2024-06-27 17:53:29,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:29,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:29,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:29,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:29,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:29,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:53:29,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 676 transitions, 13268 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:29,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:29,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:53:29,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:30,821 INFO L124 PetriNetUnfolderBase]: 2669/4668 cut-off events. [2024-06-27 17:53:30,822 INFO L125 PetriNetUnfolderBase]: For 202906/202906 co-relation queries the response was YES. [2024-06-27 17:53:30,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40298 conditions, 4668 events. 2669/4668 cut-off events. For 202906/202906 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 30818 event pairs, 615 based on Foata normal form. 2/4458 useless extension candidates. Maximal degree in co-relation 40093. Up to 4109 conditions per place. [2024-06-27 17:53:30,887 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 566 selfloop transitions, 130 changer transitions 0/703 dead transitions. [2024-06-27 17:53:30,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 703 transitions, 15014 flow [2024-06-27 17:53:30,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:53:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:53:30,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 17:53:30,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-06-27 17:53:30,889 INFO L175 Difference]: Start difference. First operand has 433 places, 676 transitions, 13268 flow. Second operand 9 states and 144 transitions. [2024-06-27 17:53:30,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 703 transitions, 15014 flow [2024-06-27 17:53:32,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 703 transitions, 14752 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 17:53:32,220 INFO L231 Difference]: Finished difference. Result has 435 places, 678 transitions, 13396 flow [2024-06-27 17:53:32,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13006, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13396, PETRI_PLACES=435, PETRI_TRANSITIONS=678} [2024-06-27 17:53:32,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-27 17:53:32,221 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 678 transitions, 13396 flow [2024-06-27 17:53:32,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:32,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:32,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:32,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 17:53:32,221 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:32,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:32,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1864469697, now seen corresponding path program 13 times [2024-06-27 17:53:32,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:32,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393240190] [2024-06-27 17:53:32,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:32,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:33,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:33,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393240190] [2024-06-27 17:53:33,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393240190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:33,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:33,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:33,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718585452] [2024-06-27 17:53:33,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:33,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:33,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:33,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:33,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:33,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:53:33,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 678 transitions, 13396 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:33,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:33,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:53:33,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:34,929 INFO L124 PetriNetUnfolderBase]: 2678/4700 cut-off events. [2024-06-27 17:53:34,930 INFO L125 PetriNetUnfolderBase]: For 208258/208258 co-relation queries the response was YES. [2024-06-27 17:53:34,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40161 conditions, 4700 events. 2678/4700 cut-off events. For 208258/208258 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 31279 event pairs, 918 based on Foata normal form. 4/4495 useless extension candidates. Maximal degree in co-relation 39955. Up to 4376 conditions per place. [2024-06-27 17:53:34,994 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 673 selfloop transitions, 23 changer transitions 0/703 dead transitions. [2024-06-27 17:53:34,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 703 transitions, 15208 flow [2024-06-27 17:53:34,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:53:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:53:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 159 transitions. [2024-06-27 17:53:34,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3803827751196172 [2024-06-27 17:53:34,995 INFO L175 Difference]: Start difference. First operand has 435 places, 678 transitions, 13396 flow. Second operand 11 states and 159 transitions. [2024-06-27 17:53:34,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 703 transitions, 15208 flow [2024-06-27 17:53:36,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 703 transitions, 14731 flow, removed 86 selfloop flow, removed 8 redundant places. [2024-06-27 17:53:36,348 INFO L231 Difference]: Finished difference. Result has 439 places, 680 transitions, 13038 flow [2024-06-27 17:53:36,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=12919, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13038, PETRI_PLACES=439, PETRI_TRANSITIONS=680} [2024-06-27 17:53:36,349 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-27 17:53:36,349 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 680 transitions, 13038 flow [2024-06-27 17:53:36,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:36,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:36,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:36,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 17:53:36,350 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:36,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:36,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1620173425, now seen corresponding path program 14 times [2024-06-27 17:53:36,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:36,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369597375] [2024-06-27 17:53:36,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:36,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:37,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:37,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369597375] [2024-06-27 17:53:37,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369597375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:37,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:37,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:37,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484440299] [2024-06-27 17:53:37,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:37,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:37,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:37,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:37,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:37,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:53:37,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 680 transitions, 13038 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:37,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:37,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:53:37,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:39,090 INFO L124 PetriNetUnfolderBase]: 2689/4699 cut-off events. [2024-06-27 17:53:39,090 INFO L125 PetriNetUnfolderBase]: For 194003/194003 co-relation queries the response was YES. [2024-06-27 17:53:39,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39636 conditions, 4699 events. 2689/4699 cut-off events. For 194003/194003 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 31032 event pairs, 603 based on Foata normal form. 2/4483 useless extension candidates. Maximal degree in co-relation 39428. Up to 4116 conditions per place. [2024-06-27 17:53:39,159 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 567 selfloop transitions, 134 changer transitions 0/708 dead transitions. [2024-06-27 17:53:39,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 708 transitions, 14763 flow [2024-06-27 17:53:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 17:53:39,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40789473684210525 [2024-06-27 17:53:39,161 INFO L175 Difference]: Start difference. First operand has 439 places, 680 transitions, 13038 flow. Second operand 10 states and 155 transitions. [2024-06-27 17:53:39,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 708 transitions, 14763 flow [2024-06-27 17:53:40,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 708 transitions, 14709 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 17:53:40,623 INFO L231 Difference]: Finished difference. Result has 440 places, 682 transitions, 13345 flow [2024-06-27 17:53:40,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=12984, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13345, PETRI_PLACES=440, PETRI_TRANSITIONS=682} [2024-06-27 17:53:40,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-27 17:53:40,624 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 682 transitions, 13345 flow [2024-06-27 17:53:40,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:40,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:40,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:40,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 17:53:40,624 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:40,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:40,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1864458785, now seen corresponding path program 5 times [2024-06-27 17:53:40,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:40,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175625429] [2024-06-27 17:53:40,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:40,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:41,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:41,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175625429] [2024-06-27 17:53:41,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175625429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:41,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:41,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:41,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903380872] [2024-06-27 17:53:41,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:41,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:41,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:41,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:41,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:41,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:53:41,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 682 transitions, 13345 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:41,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:41,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:53:41,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:43,276 INFO L124 PetriNetUnfolderBase]: 2721/4775 cut-off events. [2024-06-27 17:53:43,277 INFO L125 PetriNetUnfolderBase]: For 212427/212427 co-relation queries the response was YES. [2024-06-27 17:53:43,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40490 conditions, 4775 events. 2721/4775 cut-off events. For 212427/212427 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 31956 event pairs, 920 based on Foata normal form. 4/4579 useless extension candidates. Maximal degree in co-relation 40281. Up to 4402 conditions per place. [2024-06-27 17:53:43,347 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 681 selfloop transitions, 21 changer transitions 0/709 dead transitions. [2024-06-27 17:53:43,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 709 transitions, 15059 flow [2024-06-27 17:53:43,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:53:43,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:53:43,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 159 transitions. [2024-06-27 17:53:43,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3803827751196172 [2024-06-27 17:53:43,348 INFO L175 Difference]: Start difference. First operand has 440 places, 682 transitions, 13345 flow. Second operand 11 states and 159 transitions. [2024-06-27 17:53:43,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 709 transitions, 15059 flow [2024-06-27 17:53:44,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 709 transitions, 14721 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-27 17:53:44,720 INFO L231 Difference]: Finished difference. Result has 443 places, 684 transitions, 13158 flow [2024-06-27 17:53:44,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13007, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13158, PETRI_PLACES=443, PETRI_TRANSITIONS=684} [2024-06-27 17:53:44,721 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-27 17:53:44,721 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 684 transitions, 13158 flow [2024-06-27 17:53:44,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:44,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:44,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:44,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 17:53:44,721 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:44,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:44,722 INFO L85 PathProgramCache]: Analyzing trace with hash -2046080769, now seen corresponding path program 3 times [2024-06-27 17:53:44,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:44,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781054621] [2024-06-27 17:53:44,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:44,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:46,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:46,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781054621] [2024-06-27 17:53:46,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781054621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:46,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:46,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:46,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45518107] [2024-06-27 17:53:46,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:46,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:46,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:46,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:46,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:46,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:53:46,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 684 transitions, 13158 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:46,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:46,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:53:46,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:47,973 INFO L124 PetriNetUnfolderBase]: 2719/4767 cut-off events. [2024-06-27 17:53:47,973 INFO L125 PetriNetUnfolderBase]: For 195292/195292 co-relation queries the response was YES. [2024-06-27 17:53:48,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39997 conditions, 4767 events. 2719/4767 cut-off events. For 195292/195292 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 31837 event pairs, 719 based on Foata normal form. 1/4549 useless extension candidates. Maximal degree in co-relation 39787. Up to 4383 conditions per place. [2024-06-27 17:53:48,052 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 639 selfloop transitions, 61 changer transitions 0/707 dead transitions. [2024-06-27 17:53:48,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 707 transitions, 14767 flow [2024-06-27 17:53:48,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:48,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:48,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2024-06-27 17:53:48,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3868421052631579 [2024-06-27 17:53:48,054 INFO L175 Difference]: Start difference. First operand has 443 places, 684 transitions, 13158 flow. Second operand 10 states and 147 transitions. [2024-06-27 17:53:48,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 707 transitions, 14767 flow [2024-06-27 17:53:49,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 707 transitions, 14636 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-06-27 17:53:49,491 INFO L231 Difference]: Finished difference. Result has 444 places, 684 transitions, 13157 flow [2024-06-27 17:53:49,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13027, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13157, PETRI_PLACES=444, PETRI_TRANSITIONS=684} [2024-06-27 17:53:49,492 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-27 17:53:49,492 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 684 transitions, 13157 flow [2024-06-27 17:53:49,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:49,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:49,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:49,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 17:53:49,492 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:49,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:49,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1620412435, now seen corresponding path program 15 times [2024-06-27 17:53:49,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:49,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680060219] [2024-06-27 17:53:49,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:49,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:50,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:50,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680060219] [2024-06-27 17:53:50,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680060219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:50,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:50,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:50,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384031271] [2024-06-27 17:53:50,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:50,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:50,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:50,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:50,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:50,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:53:50,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 684 transitions, 13157 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:50,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:50,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:53:50,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:52,566 INFO L124 PetriNetUnfolderBase]: 2730/4771 cut-off events. [2024-06-27 17:53:52,566 INFO L125 PetriNetUnfolderBase]: For 198020/198020 co-relation queries the response was YES. [2024-06-27 17:53:52,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40025 conditions, 4771 events. 2730/4771 cut-off events. For 198020/198020 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 31602 event pairs, 612 based on Foata normal form. 2/4552 useless extension candidates. Maximal degree in co-relation 39814. Up to 4076 conditions per place. [2024-06-27 17:53:52,655 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 562 selfloop transitions, 148 changer transitions 0/717 dead transitions. [2024-06-27 17:53:52,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 717 transitions, 15191 flow [2024-06-27 17:53:52,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:52,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:52,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-27 17:53:52,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-06-27 17:53:52,656 INFO L175 Difference]: Start difference. First operand has 444 places, 684 transitions, 13157 flow. Second operand 10 states and 160 transitions. [2024-06-27 17:53:52,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 717 transitions, 15191 flow [2024-06-27 17:53:54,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 717 transitions, 14920 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-27 17:53:54,167 INFO L231 Difference]: Finished difference. Result has 442 places, 688 transitions, 13368 flow [2024-06-27 17:53:54,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=12888, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13368, PETRI_PLACES=442, PETRI_TRANSITIONS=688} [2024-06-27 17:53:54,167 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-27 17:53:54,168 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 688 transitions, 13368 flow [2024-06-27 17:53:54,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:54,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:54,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:54,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 17:53:54,168 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:54,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:54,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1620404065, now seen corresponding path program 16 times [2024-06-27 17:53:54,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:54,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475282877] [2024-06-27 17:53:54,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:54,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:55,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:55,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475282877] [2024-06-27 17:53:55,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475282877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:55,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:55,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:55,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953130939] [2024-06-27 17:53:55,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:55,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:55,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:55,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:55,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:55,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:53:55,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 688 transitions, 13368 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:55,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:55,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:53:55,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:57,463 INFO L124 PetriNetUnfolderBase]: 2741/4788 cut-off events. [2024-06-27 17:53:57,464 INFO L125 PetriNetUnfolderBase]: For 201325/201325 co-relation queries the response was YES. [2024-06-27 17:53:57,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40431 conditions, 4788 events. 2741/4788 cut-off events. For 201325/201325 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 31732 event pairs, 612 based on Foata normal form. 2/4568 useless extension candidates. Maximal degree in co-relation 40221. Up to 4086 conditions per place. [2024-06-27 17:53:57,543 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 564 selfloop transitions, 147 changer transitions 0/718 dead transitions. [2024-06-27 17:53:57,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 718 transitions, 15313 flow [2024-06-27 17:53:57,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:57,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:57,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-27 17:53:57,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-06-27 17:53:57,545 INFO L175 Difference]: Start difference. First operand has 442 places, 688 transitions, 13368 flow. Second operand 10 states and 160 transitions. [2024-06-27 17:53:57,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 718 transitions, 15313 flow [2024-06-27 17:53:59,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 718 transitions, 15030 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:59,078 INFO L231 Difference]: Finished difference. Result has 446 places, 690 transitions, 13476 flow [2024-06-27 17:53:59,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13101, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13476, PETRI_PLACES=446, PETRI_TRANSITIONS=690} [2024-06-27 17:53:59,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-27 17:53:59,079 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 690 transitions, 13476 flow [2024-06-27 17:53:59,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:59,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:59,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:59,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 17:53:59,080 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:53:59,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:59,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1613917315, now seen corresponding path program 17 times [2024-06-27 17:53:59,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:59,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728293586] [2024-06-27 17:53:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:59,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:00,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:00,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728293586] [2024-06-27 17:54:00,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728293586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:00,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:00,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:54:00,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511584549] [2024-06-27 17:54:00,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:00,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:54:00,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:00,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:54:00,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:54:00,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:54:00,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 690 transitions, 13476 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:00,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:00,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:54:00,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:02,475 INFO L124 PetriNetUnfolderBase]: 2737/4782 cut-off events. [2024-06-27 17:54:02,476 INFO L125 PetriNetUnfolderBase]: For 192080/192080 co-relation queries the response was YES. [2024-06-27 17:54:02,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40259 conditions, 4782 events. 2737/4782 cut-off events. For 192080/192080 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 31696 event pairs, 633 based on Foata normal form. 2/4562 useless extension candidates. Maximal degree in co-relation 40047. Up to 4254 conditions per place. [2024-06-27 17:54:02,557 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 579 selfloop transitions, 127 changer transitions 0/713 dead transitions. [2024-06-27 17:54:02,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 713 transitions, 15094 flow [2024-06-27 17:54:02,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:54:02,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:54:02,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-27 17:54:02,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3973684210526316 [2024-06-27 17:54:02,559 INFO L175 Difference]: Start difference. First operand has 446 places, 690 transitions, 13476 flow. Second operand 10 states and 151 transitions. [2024-06-27 17:54:02,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 713 transitions, 15094 flow [2024-06-27 17:54:04,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 713 transitions, 14706 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-27 17:54:04,286 INFO L231 Difference]: Finished difference. Result has 449 places, 690 transitions, 13347 flow [2024-06-27 17:54:04,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13088, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13347, PETRI_PLACES=449, PETRI_TRANSITIONS=690} [2024-06-27 17:54:04,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-27 17:54:04,287 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 690 transitions, 13347 flow [2024-06-27 17:54:04,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:04,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:04,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:04,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 17:54:04,288 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:04,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:04,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1612624549, now seen corresponding path program 6 times [2024-06-27 17:54:04,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:04,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979779061] [2024-06-27 17:54:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:04,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:05,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:05,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979779061] [2024-06-27 17:54:05,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979779061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:05,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:05,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:54:05,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617898976] [2024-06-27 17:54:05,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:05,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:54:05,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:05,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:54:05,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:54:05,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:54:05,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 690 transitions, 13347 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:05,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:05,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:54:05,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:07,202 INFO L124 PetriNetUnfolderBase]: 2750/4819 cut-off events. [2024-06-27 17:54:07,202 INFO L125 PetriNetUnfolderBase]: For 195355/195355 co-relation queries the response was YES. [2024-06-27 17:54:07,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40086 conditions, 4819 events. 2750/4819 cut-off events. For 195355/195355 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 32242 event pairs, 725 based on Foata normal form. 4/4603 useless extension candidates. Maximal degree in co-relation 39873. Up to 4408 conditions per place. [2024-06-27 17:54:07,282 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 656 selfloop transitions, 57 changer transitions 0/720 dead transitions. [2024-06-27 17:54:07,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 720 transitions, 15127 flow [2024-06-27 17:54:07,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:54:07,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:54:07,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 162 transitions. [2024-06-27 17:54:07,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875598086124402 [2024-06-27 17:54:07,284 INFO L175 Difference]: Start difference. First operand has 449 places, 690 transitions, 13347 flow. Second operand 11 states and 162 transitions. [2024-06-27 17:54:07,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 720 transitions, 15127 flow [2024-06-27 17:54:08,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 720 transitions, 14842 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 17:54:08,797 INFO L231 Difference]: Finished difference. Result has 451 places, 692 transitions, 13287 flow [2024-06-27 17:54:08,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13062, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13287, PETRI_PLACES=451, PETRI_TRANSITIONS=692} [2024-06-27 17:54:08,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-27 17:54:08,798 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 692 transitions, 13287 flow [2024-06-27 17:54:08,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:08,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:08,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:08,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 17:54:08,798 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:08,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:08,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1414188704, now seen corresponding path program 1 times [2024-06-27 17:54:08,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:08,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189642934] [2024-06-27 17:54:08,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:08,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:09,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:09,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189642934] [2024-06-27 17:54:09,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189642934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:09,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:09,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:54:09,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234003485] [2024-06-27 17:54:09,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:09,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:54:09,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:09,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:54:09,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:54:10,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:54:10,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 692 transitions, 13287 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:10,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:10,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:54:10,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:11,784 INFO L124 PetriNetUnfolderBase]: 2766/4834 cut-off events. [2024-06-27 17:54:11,784 INFO L125 PetriNetUnfolderBase]: For 188419/188419 co-relation queries the response was YES. [2024-06-27 17:54:11,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40176 conditions, 4834 events. 2766/4834 cut-off events. For 188419/188419 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 32123 event pairs, 659 based on Foata normal form. 2/4615 useless extension candidates. Maximal degree in co-relation 39962. Up to 4414 conditions per place. [2024-06-27 17:54:11,853 INFO L140 encePairwiseOnDemand]: 24/38 looper letters, 634 selfloop transitions, 80 changer transitions 0/721 dead transitions. [2024-06-27 17:54:11,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 721 transitions, 15014 flow [2024-06-27 17:54:11,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:54:11,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:54:11,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 168 transitions. [2024-06-27 17:54:11,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019138755980861 [2024-06-27 17:54:11,855 INFO L175 Difference]: Start difference. First operand has 451 places, 692 transitions, 13287 flow. Second operand 11 states and 168 transitions. [2024-06-27 17:54:11,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 721 transitions, 15014 flow [2024-06-27 17:54:13,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 721 transitions, 14805 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-27 17:54:13,351 INFO L231 Difference]: Finished difference. Result has 453 places, 694 transitions, 13351 flow [2024-06-27 17:54:13,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13078, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13351, PETRI_PLACES=453, PETRI_TRANSITIONS=694} [2024-06-27 17:54:13,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-27 17:54:13,352 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 694 transitions, 13351 flow [2024-06-27 17:54:13,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:13,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:13,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:13,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 17:54:13,352 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:13,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:13,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1993276908, now seen corresponding path program 2 times [2024-06-27 17:54:13,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:13,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046261424] [2024-06-27 17:54:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:13,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:14,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:14,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046261424] [2024-06-27 17:54:14,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046261424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:14,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:14,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:54:14,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892380695] [2024-06-27 17:54:14,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:14,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:54:14,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:14,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:54:14,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:54:14,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:54:14,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 694 transitions, 13351 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:14,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:14,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:54:14,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:16,174 INFO L124 PetriNetUnfolderBase]: 2790/4896 cut-off events. [2024-06-27 17:54:16,175 INFO L125 PetriNetUnfolderBase]: For 195306/195306 co-relation queries the response was YES. [2024-06-27 17:54:16,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40544 conditions, 4896 events. 2790/4896 cut-off events. For 195306/195306 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 32773 event pairs, 582 based on Foata normal form. 2/4678 useless extension candidates. Maximal degree in co-relation 40329. Up to 4037 conditions per place. [2024-06-27 17:54:16,251 INFO L140 encePairwiseOnDemand]: 24/38 looper letters, 578 selfloop transitions, 155 changer transitions 0/740 dead transitions. [2024-06-27 17:54:16,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 740 transitions, 15271 flow [2024-06-27 17:54:16,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 17:54:16,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 17:54:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 200 transitions. [2024-06-27 17:54:16,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4048582995951417 [2024-06-27 17:54:16,253 INFO L175 Difference]: Start difference. First operand has 453 places, 694 transitions, 13351 flow. Second operand 13 states and 200 transitions. [2024-06-27 17:54:16,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 740 transitions, 15271 flow [2024-06-27 17:54:17,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 740 transitions, 15018 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-27 17:54:17,825 INFO L231 Difference]: Finished difference. Result has 458 places, 697 transitions, 13594 flow [2024-06-27 17:54:17,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13098, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13594, PETRI_PLACES=458, PETRI_TRANSITIONS=697} [2024-06-27 17:54:17,826 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-27 17:54:17,826 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 697 transitions, 13594 flow [2024-06-27 17:54:17,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:17,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:17,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:17,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 17:54:17,827 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:17,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:17,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1993120134, now seen corresponding path program 3 times [2024-06-27 17:54:17,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:17,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888591580] [2024-06-27 17:54:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:17,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:18,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:18,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888591580] [2024-06-27 17:54:18,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888591580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:18,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:18,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:54:18,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161311372] [2024-06-27 17:54:18,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:18,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:54:18,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:18,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:54:18,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:54:18,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:54:18,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 697 transitions, 13594 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:18,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:18,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:54:18,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:20,652 INFO L124 PetriNetUnfolderBase]: 2816/4933 cut-off events. [2024-06-27 17:54:20,653 INFO L125 PetriNetUnfolderBase]: For 196521/196521 co-relation queries the response was YES. [2024-06-27 17:54:20,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41172 conditions, 4933 events. 2816/4933 cut-off events. For 196521/196521 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 32946 event pairs, 612 based on Foata normal form. 2/4711 useless extension candidates. Maximal degree in co-relation 40955. Up to 4179 conditions per place. [2024-06-27 17:54:20,734 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 525 selfloop transitions, 198 changer transitions 0/730 dead transitions. [2024-06-27 17:54:20,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 730 transitions, 15391 flow [2024-06-27 17:54:20,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:54:20,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:54:20,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-27 17:54:20,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42894736842105263 [2024-06-27 17:54:20,736 INFO L175 Difference]: Start difference. First operand has 458 places, 697 transitions, 13594 flow. Second operand 10 states and 163 transitions. [2024-06-27 17:54:20,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 730 transitions, 15391 flow [2024-06-27 17:54:22,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 730 transitions, 15017 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-27 17:54:22,351 INFO L231 Difference]: Finished difference. Result has 460 places, 701 transitions, 13760 flow [2024-06-27 17:54:22,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13220, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13760, PETRI_PLACES=460, PETRI_TRANSITIONS=701} [2024-06-27 17:54:22,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 418 predicate places. [2024-06-27 17:54:22,352 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 701 transitions, 13760 flow [2024-06-27 17:54:22,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:22,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:22,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:22,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 17:54:22,352 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:22,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:22,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1990451568, now seen corresponding path program 4 times [2024-06-27 17:54:22,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:22,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772644736] [2024-06-27 17:54:22,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:22,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:23,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:23,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772644736] [2024-06-27 17:54:23,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772644736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:23,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:23,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:54:23,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493026653] [2024-06-27 17:54:23,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:23,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:54:23,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:23,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:54:23,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:54:23,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:54:23,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 701 transitions, 13760 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:23,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:23,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:54:23,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:25,173 INFO L124 PetriNetUnfolderBase]: 2840/4994 cut-off events. [2024-06-27 17:54:25,174 INFO L125 PetriNetUnfolderBase]: For 205051/205051 co-relation queries the response was YES. [2024-06-27 17:54:25,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41649 conditions, 4994 events. 2840/4994 cut-off events. For 205051/205051 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 33558 event pairs, 727 based on Foata normal form. 2/4776 useless extension candidates. Maximal degree in co-relation 41431. Up to 4403 conditions per place. [2024-06-27 17:54:25,261 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 612 selfloop transitions, 121 changer transitions 0/740 dead transitions. [2024-06-27 17:54:25,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 740 transitions, 15668 flow [2024-06-27 17:54:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 17:54:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 17:54:25,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 194 transitions. [2024-06-27 17:54:25,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39271255060728744 [2024-06-27 17:54:25,262 INFO L175 Difference]: Start difference. First operand has 460 places, 701 transitions, 13760 flow. Second operand 13 states and 194 transitions. [2024-06-27 17:54:25,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 740 transitions, 15668 flow [2024-06-27 17:54:26,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 740 transitions, 15186 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-27 17:54:26,971 INFO L231 Difference]: Finished difference. Result has 466 places, 704 transitions, 13713 flow [2024-06-27 17:54:26,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13278, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13713, PETRI_PLACES=466, PETRI_TRANSITIONS=704} [2024-06-27 17:54:26,977 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-27 17:54:26,977 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 704 transitions, 13713 flow [2024-06-27 17:54:26,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:26,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:26,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:26,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 17:54:26,978 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:26,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:26,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1997738514, now seen corresponding path program 5 times [2024-06-27 17:54:26,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:26,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706034167] [2024-06-27 17:54:26,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:26,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:27,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:27,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706034167] [2024-06-27 17:54:27,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706034167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:27,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:27,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:54:27,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455969139] [2024-06-27 17:54:27,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:27,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:54:27,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:27,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:54:27,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:54:27,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:54:27,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 704 transitions, 13713 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:27,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:27,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:54:27,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:29,748 INFO L124 PetriNetUnfolderBase]: 2864/5035 cut-off events. [2024-06-27 17:54:29,749 INFO L125 PetriNetUnfolderBase]: For 209555/209555 co-relation queries the response was YES. [2024-06-27 17:54:29,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41965 conditions, 5035 events. 2864/5035 cut-off events. For 209555/209555 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 33858 event pairs, 726 based on Foata normal form. 2/4814 useless extension candidates. Maximal degree in co-relation 41745. Up to 4387 conditions per place. [2024-06-27 17:54:29,836 INFO L140 encePairwiseOnDemand]: 24/38 looper letters, 620 selfloop transitions, 117 changer transitions 0/744 dead transitions. [2024-06-27 17:54:29,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 744 transitions, 15627 flow [2024-06-27 17:54:29,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 17:54:29,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 17:54:29,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 195 transitions. [2024-06-27 17:54:29,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39473684210526316 [2024-06-27 17:54:29,838 INFO L175 Difference]: Start difference. First operand has 466 places, 704 transitions, 13713 flow. Second operand 13 states and 195 transitions. [2024-06-27 17:54:29,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 744 transitions, 15627 flow [2024-06-27 17:54:31,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 744 transitions, 15006 flow, removed 77 selfloop flow, removed 12 redundant places. [2024-06-27 17:54:31,928 INFO L231 Difference]: Finished difference. Result has 468 places, 707 transitions, 13523 flow [2024-06-27 17:54:31,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13092, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13523, PETRI_PLACES=468, PETRI_TRANSITIONS=707} [2024-06-27 17:54:31,940 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-27 17:54:31,940 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 707 transitions, 13523 flow [2024-06-27 17:54:31,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:31,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:31,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:31,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 17:54:31,941 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:31,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:31,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1580219256, now seen corresponding path program 6 times [2024-06-27 17:54:31,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:31,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496663573] [2024-06-27 17:54:31,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:31,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:32,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:32,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496663573] [2024-06-27 17:54:32,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496663573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:32,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:32,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:54:32,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682397553] [2024-06-27 17:54:32,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:32,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:54:32,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:32,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:54:32,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:54:32,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:54:32,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 707 transitions, 13523 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:32,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:32,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:54:32,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:34,681 INFO L124 PetriNetUnfolderBase]: 2904/5119 cut-off events. [2024-06-27 17:54:34,682 INFO L125 PetriNetUnfolderBase]: For 211985/211985 co-relation queries the response was YES. [2024-06-27 17:54:34,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42285 conditions, 5119 events. 2904/5119 cut-off events. For 211985/211985 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 34556 event pairs, 386 based on Foata normal form. 2/4909 useless extension candidates. Maximal degree in co-relation 42064. Up to 3927 conditions per place. [2024-06-27 17:54:34,773 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 534 selfloop transitions, 204 changer transitions 0/745 dead transitions. [2024-06-27 17:54:34,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 745 transitions, 15395 flow [2024-06-27 17:54:34,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:54:34,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:54:34,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-27 17:54:34,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42894736842105263 [2024-06-27 17:54:34,774 INFO L175 Difference]: Start difference. First operand has 468 places, 707 transitions, 13523 flow. Second operand 10 states and 163 transitions. [2024-06-27 17:54:34,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 745 transitions, 15395 flow [2024-06-27 17:54:36,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 745 transitions, 15045 flow, removed 80 selfloop flow, removed 9 redundant places. [2024-06-27 17:54:36,777 INFO L231 Difference]: Finished difference. Result has 470 places, 713 transitions, 13807 flow [2024-06-27 17:54:36,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13173, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13807, PETRI_PLACES=470, PETRI_TRANSITIONS=713} [2024-06-27 17:54:36,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-27 17:54:36,778 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 713 transitions, 13807 flow [2024-06-27 17:54:36,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:36,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:36,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:36,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 17:54:36,779 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:36,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:36,779 INFO L85 PathProgramCache]: Analyzing trace with hash 2085789718, now seen corresponding path program 1 times [2024-06-27 17:54:36,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:36,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635145957] [2024-06-27 17:54:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:36,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:39,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:39,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635145957] [2024-06-27 17:54:39,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635145957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:39,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:39,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:54:39,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593106451] [2024-06-27 17:54:39,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:39,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:54:39,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:39,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:54:39,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:54:39,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:54:39,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 713 transitions, 13807 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:39,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:39,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:54:39,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:41,425 INFO L124 PetriNetUnfolderBase]: 2917/5136 cut-off events. [2024-06-27 17:54:41,426 INFO L125 PetriNetUnfolderBase]: For 215064/215064 co-relation queries the response was YES. [2024-06-27 17:54:41,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42703 conditions, 5136 events. 2917/5136 cut-off events. For 215064/215064 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 34676 event pairs, 670 based on Foata normal form. 2/4901 useless extension candidates. Maximal degree in co-relation 42480. Up to 4246 conditions per place. [2024-06-27 17:54:41,507 INFO L140 encePairwiseOnDemand]: 24/38 looper letters, 526 selfloop transitions, 214 changer transitions 0/747 dead transitions. [2024-06-27 17:54:41,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 747 transitions, 15608 flow [2024-06-27 17:54:41,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:54:41,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:54:41,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-27 17:54:41,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258373205741627 [2024-06-27 17:54:41,509 INFO L175 Difference]: Start difference. First operand has 470 places, 713 transitions, 13807 flow. Second operand 11 states and 178 transitions. [2024-06-27 17:54:41,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 747 transitions, 15608 flow [2024-06-27 17:54:43,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 747 transitions, 15058 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-27 17:54:43,450 INFO L231 Difference]: Finished difference. Result has 474 places, 715 transitions, 13770 flow [2024-06-27 17:54:43,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13257, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13770, PETRI_PLACES=474, PETRI_TRANSITIONS=715} [2024-06-27 17:54:43,451 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-27 17:54:43,451 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 715 transitions, 13770 flow [2024-06-27 17:54:43,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:43,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:43,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:43,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 17:54:43,452 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:43,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:43,452 INFO L85 PathProgramCache]: Analyzing trace with hash -766013612, now seen corresponding path program 7 times [2024-06-27 17:54:43,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:43,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307716165] [2024-06-27 17:54:43,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:43,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:44,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:44,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307716165] [2024-06-27 17:54:44,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307716165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:44,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:44,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:54:44,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648671296] [2024-06-27 17:54:44,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:44,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:54:44,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:44,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:54:44,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:54:44,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:54:44,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 715 transitions, 13770 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:44,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:44,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:54:44,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:46,512 INFO L124 PetriNetUnfolderBase]: 2976/5262 cut-off events. [2024-06-27 17:54:46,513 INFO L125 PetriNetUnfolderBase]: For 216278/216278 co-relation queries the response was YES. [2024-06-27 17:54:46,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43171 conditions, 5262 events. 2976/5262 cut-off events. For 216278/216278 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35787 event pairs, 656 based on Foata normal form. 2/5021 useless extension candidates. Maximal degree in co-relation 42947. Up to 4537 conditions per place. [2024-06-27 17:54:46,610 INFO L140 encePairwiseOnDemand]: 24/38 looper letters, 647 selfloop transitions, 108 changer transitions 0/762 dead transitions. [2024-06-27 17:54:46,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 762 transitions, 15751 flow [2024-06-27 17:54:46,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:54:46,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:54:46,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-27 17:54:46,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144736842105263 [2024-06-27 17:54:46,612 INFO L175 Difference]: Start difference. First operand has 474 places, 715 transitions, 13770 flow. Second operand 12 states and 189 transitions. [2024-06-27 17:54:46,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 762 transitions, 15751 flow [2024-06-27 17:54:48,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 762 transitions, 15286 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-27 17:54:48,669 INFO L231 Difference]: Finished difference. Result has 478 places, 724 transitions, 13792 flow [2024-06-27 17:54:48,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13305, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13792, PETRI_PLACES=478, PETRI_TRANSITIONS=724} [2024-06-27 17:54:48,670 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-27 17:54:48,670 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 724 transitions, 13792 flow [2024-06-27 17:54:48,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:48,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:48,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:48,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 17:54:48,670 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:48,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:48,671 INFO L85 PathProgramCache]: Analyzing trace with hash -707777012, now seen corresponding path program 8 times [2024-06-27 17:54:48,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:48,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182264364] [2024-06-27 17:54:48,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:48,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:48,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:49,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:49,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182264364] [2024-06-27 17:54:49,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182264364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:49,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:49,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:54:49,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441026478] [2024-06-27 17:54:49,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:49,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:54:49,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:49,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:54:49,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:54:49,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:54:49,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 724 transitions, 13792 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:49,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:49,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:54:49,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:51,773 INFO L124 PetriNetUnfolderBase]: 3018/5352 cut-off events. [2024-06-27 17:54:51,774 INFO L125 PetriNetUnfolderBase]: For 224315/224315 co-relation queries the response was YES. [2024-06-27 17:54:51,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43840 conditions, 5352 events. 3018/5352 cut-off events. For 224315/224315 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 36550 event pairs, 774 based on Foata normal form. 2/5111 useless extension candidates. Maximal degree in co-relation 43614. Up to 4736 conditions per place. [2024-06-27 17:54:51,873 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 661 selfloop transitions, 93 changer transitions 0/761 dead transitions. [2024-06-27 17:54:51,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 761 transitions, 15729 flow [2024-06-27 17:54:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:54:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:54:51,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-06-27 17:54:51,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41148325358851673 [2024-06-27 17:54:51,874 INFO L175 Difference]: Start difference. First operand has 478 places, 724 transitions, 13792 flow. Second operand 11 states and 172 transitions. [2024-06-27 17:54:51,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 761 transitions, 15729 flow [2024-06-27 17:54:54,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 761 transitions, 15376 flow, removed 81 selfloop flow, removed 9 redundant places. [2024-06-27 17:54:54,101 INFO L231 Difference]: Finished difference. Result has 481 places, 730 transitions, 13870 flow [2024-06-27 17:54:54,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13439, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13870, PETRI_PLACES=481, PETRI_TRANSITIONS=730} [2024-06-27 17:54:54,102 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-27 17:54:54,102 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 730 transitions, 13870 flow [2024-06-27 17:54:54,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:54,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:54,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:54,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 17:54:54,103 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:54,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:54,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1036442844, now seen corresponding path program 9 times [2024-06-27 17:54:54,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:54,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610260813] [2024-06-27 17:54:54,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:54,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:55,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:55,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610260813] [2024-06-27 17:54:55,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610260813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:55,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:55,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:54:55,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032503129] [2024-06-27 17:54:55,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:55,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:54:55,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:55,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:54:55,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:54:55,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:54:55,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 730 transitions, 13870 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:55,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:55,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:54:55,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:57,121 INFO L124 PetriNetUnfolderBase]: 3060/5443 cut-off events. [2024-06-27 17:54:57,121 INFO L125 PetriNetUnfolderBase]: For 229200/229200 co-relation queries the response was YES. [2024-06-27 17:54:57,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44355 conditions, 5443 events. 3060/5443 cut-off events. For 229200/229200 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 37374 event pairs, 770 based on Foata normal form. 2/5198 useless extension candidates. Maximal degree in co-relation 44127. Up to 4813 conditions per place. [2024-06-27 17:54:57,219 INFO L140 encePairwiseOnDemand]: 24/38 looper letters, 675 selfloop transitions, 86 changer transitions 0/768 dead transitions. [2024-06-27 17:54:57,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 768 transitions, 15819 flow [2024-06-27 17:54:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:54:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:54:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-27 17:54:57,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4138755980861244 [2024-06-27 17:54:57,220 INFO L175 Difference]: Start difference. First operand has 481 places, 730 transitions, 13870 flow. Second operand 11 states and 173 transitions. [2024-06-27 17:54:57,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 768 transitions, 15819 flow [2024-06-27 17:54:59,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 768 transitions, 15486 flow, removed 86 selfloop flow, removed 8 redundant places. [2024-06-27 17:54:59,555 INFO L231 Difference]: Finished difference. Result has 485 places, 736 transitions, 13955 flow [2024-06-27 17:54:59,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13537, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13955, PETRI_PLACES=485, PETRI_TRANSITIONS=736} [2024-06-27 17:54:59,556 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-27 17:54:59,556 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 736 transitions, 13955 flow [2024-06-27 17:54:59,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:59,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:59,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:59,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 17:54:59,556 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:54:59,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:59,557 INFO L85 PathProgramCache]: Analyzing trace with hash -570928612, now seen corresponding path program 10 times [2024-06-27 17:54:59,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:59,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112481216] [2024-06-27 17:54:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:59,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:00,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:00,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112481216] [2024-06-27 17:55:00,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112481216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:00,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:00,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:55:00,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781146448] [2024-06-27 17:55:00,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:00,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:55:00,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:00,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:55:00,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:55:00,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:55:00,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 736 transitions, 13955 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:00,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:00,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:55:00,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:02,792 INFO L124 PetriNetUnfolderBase]: 3086/5490 cut-off events. [2024-06-27 17:55:02,793 INFO L125 PetriNetUnfolderBase]: For 232890/232890 co-relation queries the response was YES. [2024-06-27 17:55:02,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44630 conditions, 5490 events. 3086/5490 cut-off events. For 232890/232890 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 37731 event pairs, 834 based on Foata normal form. 2/5243 useless extension candidates. Maximal degree in co-relation 44400. Up to 4927 conditions per place. [2024-06-27 17:55:02,896 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 657 selfloop transitions, 103 changer transitions 0/767 dead transitions. [2024-06-27 17:55:02,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 767 transitions, 15822 flow [2024-06-27 17:55:02,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:55:02,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:55:02,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 168 transitions. [2024-06-27 17:55:02,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019138755980861 [2024-06-27 17:55:02,897 INFO L175 Difference]: Start difference. First operand has 485 places, 736 transitions, 13955 flow. Second operand 11 states and 168 transitions. [2024-06-27 17:55:02,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 767 transitions, 15822 flow [2024-06-27 17:55:05,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 767 transitions, 15514 flow, removed 89 selfloop flow, removed 7 redundant places. [2024-06-27 17:55:05,416 INFO L231 Difference]: Finished difference. Result has 489 places, 740 transitions, 14027 flow [2024-06-27 17:55:05,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13647, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14027, PETRI_PLACES=489, PETRI_TRANSITIONS=740} [2024-06-27 17:55:05,416 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-27 17:55:05,417 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 740 transitions, 14027 flow [2024-06-27 17:55:05,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:05,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:05,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:05,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 17:55:05,417 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:05,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:05,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1979674895, now seen corresponding path program 1 times [2024-06-27 17:55:05,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:05,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583037523] [2024-06-27 17:55:05,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:05,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:06,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:06,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583037523] [2024-06-27 17:55:06,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583037523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:06,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:06,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:55:06,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334669891] [2024-06-27 17:55:06,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:06,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:55:06,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:06,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:55:06,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:55:06,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:55:06,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 740 transitions, 14027 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:06,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:06,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:55:06,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:09,061 INFO L124 PetriNetUnfolderBase]: 3094/5502 cut-off events. [2024-06-27 17:55:09,061 INFO L125 PetriNetUnfolderBase]: For 225824/225824 co-relation queries the response was YES. [2024-06-27 17:55:09,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44568 conditions, 5502 events. 3094/5502 cut-off events. For 225824/225824 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 37859 event pairs, 834 based on Foata normal form. 1/5248 useless extension candidates. Maximal degree in co-relation 44337. Up to 4974 conditions per place. [2024-06-27 17:55:09,159 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 659 selfloop transitions, 103 changer transitions 0/769 dead transitions. [2024-06-27 17:55:09,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 769 transitions, 15838 flow [2024-06-27 17:55:09,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:55:09,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:55:09,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-27 17:55:09,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39712918660287083 [2024-06-27 17:55:09,160 INFO L175 Difference]: Start difference. First operand has 489 places, 740 transitions, 14027 flow. Second operand 11 states and 166 transitions. [2024-06-27 17:55:09,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 769 transitions, 15838 flow [2024-06-27 17:55:11,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 769 transitions, 15510 flow, removed 68 selfloop flow, removed 9 redundant places. [2024-06-27 17:55:11,502 INFO L231 Difference]: Finished difference. Result has 491 places, 744 transitions, 14041 flow [2024-06-27 17:55:11,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13699, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14041, PETRI_PLACES=491, PETRI_TRANSITIONS=744} [2024-06-27 17:55:11,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-27 17:55:11,503 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 744 transitions, 14041 flow [2024-06-27 17:55:11,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:11,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:11,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:11,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 17:55:11,504 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:11,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:11,504 INFO L85 PathProgramCache]: Analyzing trace with hash -565356486, now seen corresponding path program 2 times [2024-06-27 17:55:11,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:11,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614688474] [2024-06-27 17:55:11,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:11,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:13,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:13,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614688474] [2024-06-27 17:55:13,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614688474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:13,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:13,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:55:13,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701804960] [2024-06-27 17:55:13,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:13,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:55:13,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:13,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:55:13,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:55:13,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:55:13,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 744 transitions, 14041 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:13,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:13,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:55:13,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:15,175 INFO L124 PetriNetUnfolderBase]: 3112/5528 cut-off events. [2024-06-27 17:55:15,176 INFO L125 PetriNetUnfolderBase]: For 225857/225857 co-relation queries the response was YES. [2024-06-27 17:55:15,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44514 conditions, 5528 events. 3112/5528 cut-off events. For 225857/225857 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 37966 event pairs, 834 based on Foata normal form. 2/5269 useless extension candidates. Maximal degree in co-relation 44282. Up to 5020 conditions per place. [2024-06-27 17:55:15,278 INFO L140 encePairwiseOnDemand]: 23/38 looper letters, 683 selfloop transitions, 86 changer transitions 0/776 dead transitions. [2024-06-27 17:55:15,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 776 transitions, 15872 flow [2024-06-27 17:55:15,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:55:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:55:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 179 transitions. [2024-06-27 17:55:15,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925438596491228 [2024-06-27 17:55:15,280 INFO L175 Difference]: Start difference. First operand has 491 places, 744 transitions, 14041 flow. Second operand 12 states and 179 transitions. [2024-06-27 17:55:15,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 776 transitions, 15872 flow [2024-06-27 17:55:17,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 776 transitions, 15612 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-27 17:55:17,677 INFO L231 Difference]: Finished difference. Result has 494 places, 748 transitions, 14059 flow [2024-06-27 17:55:17,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13781, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14059, PETRI_PLACES=494, PETRI_TRANSITIONS=748} [2024-06-27 17:55:17,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-27 17:55:17,678 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 748 transitions, 14059 flow [2024-06-27 17:55:17,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:17,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:17,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:17,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 17:55:17,679 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:17,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:17,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1439907138, now seen corresponding path program 11 times [2024-06-27 17:55:17,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:17,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227430915] [2024-06-27 17:55:17,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:17,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:18,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:18,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:18,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227430915] [2024-06-27 17:55:18,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227430915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:18,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:18,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:55:18,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005230314] [2024-06-27 17:55:18,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:18,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:55:18,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:18,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:55:18,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:55:18,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:55:18,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 748 transitions, 14059 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:18,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:18,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:55:18,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:20,749 INFO L124 PetriNetUnfolderBase]: 3136/5579 cut-off events. [2024-06-27 17:55:20,750 INFO L125 PetriNetUnfolderBase]: For 235229/235229 co-relation queries the response was YES. [2024-06-27 17:55:20,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45121 conditions, 5579 events. 3136/5579 cut-off events. For 235229/235229 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 38491 event pairs, 813 based on Foata normal form. 2/5319 useless extension candidates. Maximal degree in co-relation 44888. Up to 4932 conditions per place. [2024-06-27 17:55:20,856 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 635 selfloop transitions, 140 changer transitions 0/782 dead transitions. [2024-06-27 17:55:20,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 782 transitions, 16045 flow [2024-06-27 17:55:20,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:55:20,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:55:20,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-27 17:55:20,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-06-27 17:55:20,857 INFO L175 Difference]: Start difference. First operand has 494 places, 748 transitions, 14059 flow. Second operand 11 states and 176 transitions. [2024-06-27 17:55:20,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 782 transitions, 16045 flow [2024-06-27 17:55:23,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 782 transitions, 15861 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 17:55:23,467 INFO L231 Difference]: Finished difference. Result has 498 places, 751 transitions, 14371 flow [2024-06-27 17:55:23,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13875, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14371, PETRI_PLACES=498, PETRI_TRANSITIONS=751} [2024-06-27 17:55:23,467 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 456 predicate places. [2024-06-27 17:55:23,467 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 751 transitions, 14371 flow [2024-06-27 17:55:23,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:23,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:23,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:23,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 17:55:23,468 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:23,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:23,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1323877706, now seen corresponding path program 12 times [2024-06-27 17:55:23,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:23,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318903920] [2024-06-27 17:55:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:23,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:24,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:24,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318903920] [2024-06-27 17:55:24,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318903920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:24,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:24,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:55:24,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392087029] [2024-06-27 17:55:24,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:24,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:55:24,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:24,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:55:24,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:55:24,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:55:24,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 751 transitions, 14371 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:24,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:24,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:55:24,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:26,644 INFO L124 PetriNetUnfolderBase]: 3160/5629 cut-off events. [2024-06-27 17:55:26,644 INFO L125 PetriNetUnfolderBase]: For 246538/246538 co-relation queries the response was YES. [2024-06-27 17:55:26,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45942 conditions, 5629 events. 3160/5629 cut-off events. For 246538/246538 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 38924 event pairs, 810 based on Foata normal form. 2/5369 useless extension candidates. Maximal degree in co-relation 45707. Up to 4923 conditions per place. [2024-06-27 17:55:26,737 INFO L140 encePairwiseOnDemand]: 24/38 looper letters, 634 selfloop transitions, 145 changer transitions 0/786 dead transitions. [2024-06-27 17:55:26,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 786 transitions, 16363 flow [2024-06-27 17:55:26,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:55:26,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:55:26,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-27 17:55:26,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423444976076555 [2024-06-27 17:55:26,740 INFO L175 Difference]: Start difference. First operand has 498 places, 751 transitions, 14371 flow. Second operand 11 states and 177 transitions. [2024-06-27 17:55:26,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 786 transitions, 16363 flow [2024-06-27 17:55:29,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 786 transitions, 15901 flow, removed 95 selfloop flow, removed 8 redundant places. [2024-06-27 17:55:29,161 INFO L231 Difference]: Finished difference. Result has 502 places, 754 transitions, 14425 flow [2024-06-27 17:55:29,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13909, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14425, PETRI_PLACES=502, PETRI_TRANSITIONS=754} [2024-06-27 17:55:29,165 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-27 17:55:29,165 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 754 transitions, 14425 flow [2024-06-27 17:55:29,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:29,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:29,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:29,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 17:55:29,166 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:29,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:29,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1245967728, now seen corresponding path program 13 times [2024-06-27 17:55:29,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:29,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413383870] [2024-06-27 17:55:29,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:29,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:30,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:30,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413383870] [2024-06-27 17:55:30,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413383870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:30,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:30,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:55:30,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96325599] [2024-06-27 17:55:30,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:30,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:55:30,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:30,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:55:30,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:55:30,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:55:30,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 754 transitions, 14425 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:30,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:30,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:55:30,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:32,640 INFO L124 PetriNetUnfolderBase]: 3173/5653 cut-off events. [2024-06-27 17:55:32,641 INFO L125 PetriNetUnfolderBase]: For 246725/246725 co-relation queries the response was YES. [2024-06-27 17:55:32,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45885 conditions, 5653 events. 3173/5653 cut-off events. For 246725/246725 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 39162 event pairs, 807 based on Foata normal form. 2/5390 useless extension candidates. Maximal degree in co-relation 45648. Up to 4902 conditions per place. [2024-06-27 17:55:32,747 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 600 selfloop transitions, 181 changer transitions 0/788 dead transitions. [2024-06-27 17:55:32,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 788 transitions, 16303 flow [2024-06-27 17:55:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:55:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:55:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-27 17:55:32,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41626794258373206 [2024-06-27 17:55:32,749 INFO L175 Difference]: Start difference. First operand has 502 places, 754 transitions, 14425 flow. Second operand 11 states and 174 transitions. [2024-06-27 17:55:32,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 788 transitions, 16303 flow [2024-06-27 17:55:35,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 788 transitions, 15790 flow, removed 105 selfloop flow, removed 8 redundant places. [2024-06-27 17:55:35,367 INFO L231 Difference]: Finished difference. Result has 506 places, 758 transitions, 14387 flow [2024-06-27 17:55:35,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=13912, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14387, PETRI_PLACES=506, PETRI_TRANSITIONS=758} [2024-06-27 17:55:35,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-27 17:55:35,368 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 758 transitions, 14387 flow [2024-06-27 17:55:35,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:35,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:35,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:35,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 17:55:35,368 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:35,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:35,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1238333451, now seen corresponding path program 1 times [2024-06-27 17:55:35,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:35,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387147813] [2024-06-27 17:55:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:35,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:36,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:36,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387147813] [2024-06-27 17:55:36,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387147813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:36,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:36,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:55:36,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934582911] [2024-06-27 17:55:36,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:36,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:55:36,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:36,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:55:36,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:55:37,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:55:37,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 758 transitions, 14387 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:37,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:37,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:55:37,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:39,138 INFO L124 PetriNetUnfolderBase]: 3189/5692 cut-off events. [2024-06-27 17:55:39,138 INFO L125 PetriNetUnfolderBase]: For 248136/248136 co-relation queries the response was YES. [2024-06-27 17:55:39,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46002 conditions, 5692 events. 3189/5692 cut-off events. For 248136/248136 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 39641 event pairs, 1011 based on Foata normal form. 2/5433 useless extension candidates. Maximal degree in co-relation 45763. Up to 5135 conditions per place. [2024-06-27 17:55:39,248 INFO L140 encePairwiseOnDemand]: 24/38 looper letters, 703 selfloop transitions, 82 changer transitions 0/792 dead transitions. [2024-06-27 17:55:39,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 792 transitions, 16350 flow [2024-06-27 17:55:39,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:55:39,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:55:39,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 180 transitions. [2024-06-27 17:55:39,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39473684210526316 [2024-06-27 17:55:39,249 INFO L175 Difference]: Start difference. First operand has 506 places, 758 transitions, 14387 flow. Second operand 12 states and 180 transitions. [2024-06-27 17:55:39,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 792 transitions, 16350 flow [2024-06-27 17:55:41,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 792 transitions, 16106 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:41,738 INFO L231 Difference]: Finished difference. Result has 513 places, 760 transitions, 14447 flow [2024-06-27 17:55:41,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=14143, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14447, PETRI_PLACES=513, PETRI_TRANSITIONS=760} [2024-06-27 17:55:41,739 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 471 predicate places. [2024-06-27 17:55:41,739 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 760 transitions, 14447 flow [2024-06-27 17:55:41,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:41,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:41,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:41,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 17:55:41,740 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:41,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:41,757 INFO L85 PathProgramCache]: Analyzing trace with hash 179910940, now seen corresponding path program 14 times [2024-06-27 17:55:41,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:41,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360956516] [2024-06-27 17:55:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:41,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:42,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:42,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360956516] [2024-06-27 17:55:42,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360956516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:42,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:42,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:55:42,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032437794] [2024-06-27 17:55:42,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:42,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:55:42,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:42,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:55:42,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:55:42,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:55:42,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 760 transitions, 14447 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:42,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:42,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:55:42,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:45,327 INFO L124 PetriNetUnfolderBase]: 3221/5746 cut-off events. [2024-06-27 17:55:45,328 INFO L125 PetriNetUnfolderBase]: For 255450/255450 co-relation queries the response was YES. [2024-06-27 17:55:45,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46525 conditions, 5746 events. 3221/5746 cut-off events. For 255450/255450 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 39965 event pairs, 931 based on Foata normal form. 2/5494 useless extension candidates. Maximal degree in co-relation 46284. Up to 4976 conditions per place. [2024-06-27 17:55:45,435 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 628 selfloop transitions, 157 changer transitions 0/792 dead transitions. [2024-06-27 17:55:45,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 792 transitions, 16416 flow [2024-06-27 17:55:45,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:55:45,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:55:45,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-27 17:55:45,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 17:55:45,437 INFO L175 Difference]: Start difference. First operand has 513 places, 760 transitions, 14447 flow. Second operand 10 states and 152 transitions. [2024-06-27 17:55:45,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 792 transitions, 16416 flow [2024-06-27 17:55:47,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 792 transitions, 16155 flow, removed 60 selfloop flow, removed 9 redundant places. [2024-06-27 17:55:47,695 INFO L231 Difference]: Finished difference. Result has 514 places, 764 transitions, 14696 flow [2024-06-27 17:55:47,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=14186, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14696, PETRI_PLACES=514, PETRI_TRANSITIONS=764} [2024-06-27 17:55:47,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 472 predicate places. [2024-06-27 17:55:47,702 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 764 transitions, 14696 flow [2024-06-27 17:55:47,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:47,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:47,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:47,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 17:55:47,703 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:47,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:47,704 INFO L85 PathProgramCache]: Analyzing trace with hash 179905360, now seen corresponding path program 15 times [2024-06-27 17:55:47,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:47,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204513099] [2024-06-27 17:55:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:47,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:48,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:48,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204513099] [2024-06-27 17:55:48,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204513099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:48,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:48,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:55:48,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818317435] [2024-06-27 17:55:48,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:48,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:55:48,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:48,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:55:48,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:55:48,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:55:48,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 764 transitions, 14696 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:48,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:48,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:55:48,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:50,951 INFO L124 PetriNetUnfolderBase]: 3245/5794 cut-off events. [2024-06-27 17:55:50,951 INFO L125 PetriNetUnfolderBase]: For 266608/266608 co-relation queries the response was YES. [2024-06-27 17:55:51,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47458 conditions, 5794 events. 3245/5794 cut-off events. For 266608/266608 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 40392 event pairs, 895 based on Foata normal form. 2/5539 useless extension candidates. Maximal degree in co-relation 47216. Up to 4883 conditions per place. [2024-06-27 17:55:51,055 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 652 selfloop transitions, 140 changer transitions 0/799 dead transitions. [2024-06-27 17:55:51,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 799 transitions, 16765 flow [2024-06-27 17:55:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:55:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:55:51,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-27 17:55:51,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105263157894737 [2024-06-27 17:55:51,056 INFO L175 Difference]: Start difference. First operand has 514 places, 764 transitions, 14696 flow. Second operand 10 states and 156 transitions. [2024-06-27 17:55:51,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 799 transitions, 16765 flow [2024-06-27 17:55:53,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 799 transitions, 16323 flow, removed 76 selfloop flow, removed 8 redundant places. [2024-06-27 17:55:53,722 INFO L231 Difference]: Finished difference. Result has 517 places, 767 transitions, 14809 flow [2024-06-27 17:55:53,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=14258, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14809, PETRI_PLACES=517, PETRI_TRANSITIONS=767} [2024-06-27 17:55:53,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 475 predicate places. [2024-06-27 17:55:53,723 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 767 transitions, 14809 flow [2024-06-27 17:55:53,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:53,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:53,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:53,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 17:55:53,724 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:53,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:53,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1319390252, now seen corresponding path program 16 times [2024-06-27 17:55:53,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:53,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660165456] [2024-06-27 17:55:53,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:53,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:54,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:54,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660165456] [2024-06-27 17:55:54,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660165456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:54,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:54,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:55:54,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698474286] [2024-06-27 17:55:54,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:54,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:55:54,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:54,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:55:54,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:55:54,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:55:54,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 767 transitions, 14809 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:54,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:54,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:55:54,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:56,985 INFO L124 PetriNetUnfolderBase]: 3269/5841 cut-off events. [2024-06-27 17:55:56,985 INFO L125 PetriNetUnfolderBase]: For 272050/272050 co-relation queries the response was YES. [2024-06-27 17:55:57,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48038 conditions, 5841 events. 3269/5841 cut-off events. For 272050/272050 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 40889 event pairs, 862 based on Foata normal form. 2/5578 useless extension candidates. Maximal degree in co-relation 47794. Up to 4848 conditions per place. [2024-06-27 17:55:57,094 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 661 selfloop transitions, 135 changer transitions 0/803 dead transitions. [2024-06-27 17:55:57,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 803 transitions, 16880 flow [2024-06-27 17:55:57,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:55:57,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:55:57,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-27 17:55:57,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131578947368421 [2024-06-27 17:55:57,095 INFO L175 Difference]: Start difference. First operand has 517 places, 767 transitions, 14809 flow. Second operand 10 states and 157 transitions. [2024-06-27 17:55:57,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 803 transitions, 16880 flow [2024-06-27 17:55:59,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 803 transitions, 16425 flow, removed 111 selfloop flow, removed 7 redundant places. [2024-06-27 17:55:59,762 INFO L231 Difference]: Finished difference. Result has 521 places, 770 transitions, 14897 flow [2024-06-27 17:55:59,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=14366, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14897, PETRI_PLACES=521, PETRI_TRANSITIONS=770} [2024-06-27 17:55:59,763 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 479 predicate places. [2024-06-27 17:55:59,763 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 770 transitions, 14897 flow [2024-06-27 17:55:59,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:59,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:59,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:59,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 17:55:59,764 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:55:59,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:59,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1261297802, now seen corresponding path program 17 times [2024-06-27 17:55:59,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:59,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649045064] [2024-06-27 17:55:59,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:59,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:00,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:00,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649045064] [2024-06-27 17:56:00,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649045064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:00,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:00,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:56:00,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806502317] [2024-06-27 17:56:00,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:00,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:56:00,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:00,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:56:00,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:56:00,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:56:00,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 770 transitions, 14897 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:00,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:00,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:56:00,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:03,001 INFO L124 PetriNetUnfolderBase]: 3293/5898 cut-off events. [2024-06-27 17:56:03,001 INFO L125 PetriNetUnfolderBase]: For 270114/270114 co-relation queries the response was YES. [2024-06-27 17:56:03,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48436 conditions, 5898 events. 3293/5898 cut-off events. For 270114/270114 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 41407 event pairs, 576 based on Foata normal form. 2/5661 useless extension candidates. Maximal degree in co-relation 48190. Up to 4476 conditions per place. [2024-06-27 17:56:03,108 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 609 selfloop transitions, 196 changer transitions 0/812 dead transitions. [2024-06-27 17:56:03,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 812 transitions, 17032 flow [2024-06-27 17:56:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:56:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:56:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-06-27 17:56:03,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41148325358851673 [2024-06-27 17:56:03,109 INFO L175 Difference]: Start difference. First operand has 521 places, 770 transitions, 14897 flow. Second operand 11 states and 172 transitions. [2024-06-27 17:56:03,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 812 transitions, 17032 flow [2024-06-27 17:56:05,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 812 transitions, 16589 flow, removed 108 selfloop flow, removed 7 redundant places. [2024-06-27 17:56:05,862 INFO L231 Difference]: Finished difference. Result has 526 places, 773 transitions, 15132 flow [2024-06-27 17:56:05,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=14466, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15132, PETRI_PLACES=526, PETRI_TRANSITIONS=773} [2024-06-27 17:56:05,863 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 484 predicate places. [2024-06-27 17:56:05,863 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 773 transitions, 15132 flow [2024-06-27 17:56:05,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:05,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:05,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:05,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 17:56:05,864 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:05,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:05,864 INFO L85 PathProgramCache]: Analyzing trace with hash 104598359, now seen corresponding path program 2 times [2024-06-27 17:56:05,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:05,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221226633] [2024-06-27 17:56:05,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:05,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:07,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:07,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221226633] [2024-06-27 17:56:07,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221226633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:07,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:07,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:56:07,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063287339] [2024-06-27 17:56:07,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:07,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:56:07,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:07,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:56:07,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:56:07,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:56:07,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 773 transitions, 15132 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:07,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:07,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:56:07,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:09,445 INFO L124 PetriNetUnfolderBase]: 3297/5903 cut-off events. [2024-06-27 17:56:09,445 INFO L125 PetriNetUnfolderBase]: For 248919/248919 co-relation queries the response was YES. [2024-06-27 17:56:09,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48461 conditions, 5903 events. 3297/5903 cut-off events. For 248919/248919 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 41385 event pairs, 975 based on Foata normal form. 1/5638 useless extension candidates. Maximal degree in co-relation 48213. Up to 5158 conditions per place. [2024-06-27 17:56:09,565 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 633 selfloop transitions, 161 changer transitions 0/801 dead transitions. [2024-06-27 17:56:09,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 801 transitions, 16976 flow [2024-06-27 17:56:09,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:56:09,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:56:09,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2024-06-27 17:56:09,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39473684210526316 [2024-06-27 17:56:09,567 INFO L175 Difference]: Start difference. First operand has 526 places, 773 transitions, 15132 flow. Second operand 10 states and 150 transitions. [2024-06-27 17:56:09,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 801 transitions, 16976 flow [2024-06-27 17:56:12,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 801 transitions, 16408 flow, removed 119 selfloop flow, removed 8 redundant places. [2024-06-27 17:56:12,367 INFO L231 Difference]: Finished difference. Result has 528 places, 775 transitions, 14963 flow [2024-06-27 17:56:12,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=14564, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14963, PETRI_PLACES=528, PETRI_TRANSITIONS=775} [2024-06-27 17:56:12,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 486 predicate places. [2024-06-27 17:56:12,368 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 775 transitions, 14963 flow [2024-06-27 17:56:12,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:12,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:12,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:12,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 17:56:12,369 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:12,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:12,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1050356916, now seen corresponding path program 3 times [2024-06-27 17:56:12,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:12,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809607500] [2024-06-27 17:56:12,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:12,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:13,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:13,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809607500] [2024-06-27 17:56:13,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809607500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:13,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:13,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:56:13,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445951979] [2024-06-27 17:56:13,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:13,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:56:13,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:13,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:56:13,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:56:13,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:56:13,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 775 transitions, 14963 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:13,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:13,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:56:13,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:16,453 INFO L124 PetriNetUnfolderBase]: 3323/5940 cut-off events. [2024-06-27 17:56:16,453 INFO L125 PetriNetUnfolderBase]: For 238237/238237 co-relation queries the response was YES. [2024-06-27 17:56:16,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48048 conditions, 5940 events. 3323/5940 cut-off events. For 238237/238237 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 41652 event pairs, 979 based on Foata normal form. 2/5668 useless extension candidates. Maximal degree in co-relation 47799. Up to 5238 conditions per place. [2024-06-27 17:56:16,549 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 678 selfloop transitions, 123 changer transitions 0/808 dead transitions. [2024-06-27 17:56:16,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 808 transitions, 16904 flow [2024-06-27 17:56:16,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:56:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:56:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 163 transitions. [2024-06-27 17:56:16,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38995215311004783 [2024-06-27 17:56:16,550 INFO L175 Difference]: Start difference. First operand has 528 places, 775 transitions, 14963 flow. Second operand 11 states and 163 transitions. [2024-06-27 17:56:16,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 808 transitions, 16904 flow [2024-06-27 17:56:18,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 808 transitions, 16560 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-27 17:56:18,879 INFO L231 Difference]: Finished difference. Result has 530 places, 779 transitions, 14985 flow [2024-06-27 17:56:18,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=14619, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14985, PETRI_PLACES=530, PETRI_TRANSITIONS=779} [2024-06-27 17:56:18,879 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 488 predicate places. [2024-06-27 17:56:18,879 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 779 transitions, 14985 flow [2024-06-27 17:56:18,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:18,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:18,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:18,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 17:56:18,880 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:18,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:18,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1250843584, now seen corresponding path program 18 times [2024-06-27 17:56:18,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:18,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097755176] [2024-06-27 17:56:18,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:18,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:20,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:20,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097755176] [2024-06-27 17:56:20,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097755176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:20,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:20,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:56:20,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796247970] [2024-06-27 17:56:20,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:20,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:56:20,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:20,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:56:20,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:56:20,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:56:20,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 779 transitions, 14985 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:20,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:20,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:56:20,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:22,619 INFO L124 PetriNetUnfolderBase]: 3355/5992 cut-off events. [2024-06-27 17:56:22,619 INFO L125 PetriNetUnfolderBase]: For 240430/240430 co-relation queries the response was YES. [2024-06-27 17:56:22,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48524 conditions, 5992 events. 3355/5992 cut-off events. For 240430/240430 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 42051 event pairs, 844 based on Foata normal form. 2/5712 useless extension candidates. Maximal degree in co-relation 48274. Up to 4938 conditions per place. [2024-06-27 17:56:22,728 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 576 selfloop transitions, 231 changer transitions 0/814 dead transitions. [2024-06-27 17:56:22,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 814 transitions, 17037 flow [2024-06-27 17:56:22,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:56:22,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:56:22,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-27 17:56:22,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41842105263157897 [2024-06-27 17:56:22,729 INFO L175 Difference]: Start difference. First operand has 530 places, 779 transitions, 14985 flow. Second operand 10 states and 159 transitions. [2024-06-27 17:56:22,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 814 transitions, 17037 flow [2024-06-27 17:56:25,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 814 transitions, 16739 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-27 17:56:25,390 INFO L231 Difference]: Finished difference. Result has 531 places, 783 transitions, 15312 flow [2024-06-27 17:56:25,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=14687, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15312, PETRI_PLACES=531, PETRI_TRANSITIONS=783} [2024-06-27 17:56:25,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 489 predicate places. [2024-06-27 17:56:25,391 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 783 transitions, 15312 flow [2024-06-27 17:56:25,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:25,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:25,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:25,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 17:56:25,391 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:25,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:25,392 INFO L85 PathProgramCache]: Analyzing trace with hash -955395684, now seen corresponding path program 4 times [2024-06-27 17:56:25,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:25,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792154933] [2024-06-27 17:56:25,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:25,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:27,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:27,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792154933] [2024-06-27 17:56:27,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792154933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:27,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:27,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:56:27,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121649839] [2024-06-27 17:56:27,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:27,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:56:27,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:27,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:56:27,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:56:27,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:56:27,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 783 transitions, 15312 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:27,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:27,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:56:27,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:29,389 INFO L124 PetriNetUnfolderBase]: 3398/6055 cut-off events. [2024-06-27 17:56:29,389 INFO L125 PetriNetUnfolderBase]: For 256653/256653 co-relation queries the response was YES. [2024-06-27 17:56:29,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49609 conditions, 6055 events. 3398/6055 cut-off events. For 256653/256653 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 42375 event pairs, 847 based on Foata normal form. 2/5764 useless extension candidates. Maximal degree in co-relation 49358. Up to 4644 conditions per place. [2024-06-27 17:56:29,506 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 547 selfloop transitions, 266 changer transitions 0/820 dead transitions. [2024-06-27 17:56:29,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 820 transitions, 17602 flow [2024-06-27 17:56:29,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:56:29,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:56:29,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 17:56:29,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263157894736842 [2024-06-27 17:56:29,507 INFO L175 Difference]: Start difference. First operand has 531 places, 783 transitions, 15312 flow. Second operand 10 states and 162 transitions. [2024-06-27 17:56:29,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 820 transitions, 17602 flow [2024-06-27 17:56:32,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 820 transitions, 17017 flow, removed 65 selfloop flow, removed 8 redundant places. [2024-06-27 17:56:32,295 INFO L231 Difference]: Finished difference. Result has 533 places, 789 transitions, 15451 flow [2024-06-27 17:56:32,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=14727, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15451, PETRI_PLACES=533, PETRI_TRANSITIONS=789} [2024-06-27 17:56:32,296 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-27 17:56:32,296 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 789 transitions, 15451 flow [2024-06-27 17:56:32,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:32,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:32,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:32,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 17:56:32,297 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:32,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:32,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1251120631, now seen corresponding path program 2 times [2024-06-27 17:56:32,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:32,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524905854] [2024-06-27 17:56:32,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:32,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:34,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:34,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524905854] [2024-06-27 17:56:34,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524905854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:34,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:34,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:56:34,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226003085] [2024-06-27 17:56:34,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:34,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:56:34,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:34,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:56:34,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:56:34,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:56:34,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 789 transitions, 15451 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:34,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:34,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:56:34,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:36,499 INFO L124 PetriNetUnfolderBase]: 3414/6094 cut-off events. [2024-06-27 17:56:36,500 INFO L125 PetriNetUnfolderBase]: For 261409/261409 co-relation queries the response was YES. [2024-06-27 17:56:36,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49911 conditions, 6094 events. 3414/6094 cut-off events. For 261409/261409 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 42953 event pairs, 1063 based on Foata normal form. 2/5811 useless extension candidates. Maximal degree in co-relation 49659. Up to 5376 conditions per place. [2024-06-27 17:56:36,628 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 718 selfloop transitions, 98 changer transitions 0/823 dead transitions. [2024-06-27 17:56:36,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 823 transitions, 17506 flow [2024-06-27 17:56:36,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:56:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:56:36,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 165 transitions. [2024-06-27 17:56:36,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39473684210526316 [2024-06-27 17:56:36,629 INFO L175 Difference]: Start difference. First operand has 533 places, 789 transitions, 15451 flow. Second operand 11 states and 165 transitions. [2024-06-27 17:56:36,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 823 transitions, 17506 flow [2024-06-27 17:56:39,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 823 transitions, 17109 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 17:56:39,479 INFO L231 Difference]: Finished difference. Result has 537 places, 791 transitions, 15394 flow [2024-06-27 17:56:39,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15054, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15394, PETRI_PLACES=537, PETRI_TRANSITIONS=791} [2024-06-27 17:56:39,480 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 495 predicate places. [2024-06-27 17:56:39,480 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 791 transitions, 15394 flow [2024-06-27 17:56:39,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:39,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:39,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:39,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 17:56:39,480 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:39,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:39,481 INFO L85 PathProgramCache]: Analyzing trace with hash -963014740, now seen corresponding path program 19 times [2024-06-27 17:56:39,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:39,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444024015] [2024-06-27 17:56:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:39,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:40,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:40,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444024015] [2024-06-27 17:56:40,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444024015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:40,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:40,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:56:40,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587154945] [2024-06-27 17:56:40,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:40,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:56:40,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:40,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:56:40,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:56:40,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:56:40,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 791 transitions, 15394 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:40,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:40,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:56:40,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:43,201 INFO L124 PetriNetUnfolderBase]: 3446/6141 cut-off events. [2024-06-27 17:56:43,201 INFO L125 PetriNetUnfolderBase]: For 261554/261554 co-relation queries the response was YES. [2024-06-27 17:56:43,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50405 conditions, 6141 events. 3446/6141 cut-off events. For 261554/261554 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 43209 event pairs, 866 based on Foata normal form. 2/5850 useless extension candidates. Maximal degree in co-relation 50152. Up to 5266 conditions per place. [2024-06-27 17:56:43,311 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 627 selfloop transitions, 191 changer transitions 0/825 dead transitions. [2024-06-27 17:56:43,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 825 transitions, 17470 flow [2024-06-27 17:56:43,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:56:43,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:56:43,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-27 17:56:43,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131578947368421 [2024-06-27 17:56:43,313 INFO L175 Difference]: Start difference. First operand has 537 places, 791 transitions, 15394 flow. Second operand 10 states and 157 transitions. [2024-06-27 17:56:43,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 825 transitions, 17470 flow [2024-06-27 17:56:46,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 825 transitions, 17156 flow, removed 65 selfloop flow, removed 9 redundant places. [2024-06-27 17:56:46,055 INFO L231 Difference]: Finished difference. Result has 538 places, 795 transitions, 15635 flow [2024-06-27 17:56:46,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15084, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15635, PETRI_PLACES=538, PETRI_TRANSITIONS=795} [2024-06-27 17:56:46,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 496 predicate places. [2024-06-27 17:56:46,056 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 795 transitions, 15635 flow [2024-06-27 17:56:46,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:46,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:46,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:46,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 17:56:46,056 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:46,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:46,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1250851520, now seen corresponding path program 5 times [2024-06-27 17:56:46,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:46,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287185587] [2024-06-27 17:56:46,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:46,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:47,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:47,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287185587] [2024-06-27 17:56:47,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287185587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:47,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:47,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:56:47,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018427642] [2024-06-27 17:56:47,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:47,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:56:47,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:47,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:56:47,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:56:47,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:56:47,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 795 transitions, 15635 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:47,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:47,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:56:47,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:49,804 INFO L124 PetriNetUnfolderBase]: 3472/6179 cut-off events. [2024-06-27 17:56:49,804 INFO L125 PetriNetUnfolderBase]: For 258405/258405 co-relation queries the response was YES. [2024-06-27 17:56:49,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50772 conditions, 6179 events. 3472/6179 cut-off events. For 258405/258405 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 43430 event pairs, 856 based on Foata normal form. 2/5880 useless extension candidates. Maximal degree in co-relation 50518. Up to 4919 conditions per place. [2024-06-27 17:56:49,939 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 575 selfloop transitions, 249 changer transitions 0/831 dead transitions. [2024-06-27 17:56:49,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 831 transitions, 17675 flow [2024-06-27 17:56:49,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:56:49,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:56:49,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-06-27 17:56:49,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41148325358851673 [2024-06-27 17:56:49,941 INFO L175 Difference]: Start difference. First operand has 538 places, 795 transitions, 15635 flow. Second operand 11 states and 172 transitions. [2024-06-27 17:56:49,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 831 transitions, 17675 flow [2024-06-27 17:56:52,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 831 transitions, 17164 flow, removed 68 selfloop flow, removed 8 redundant places. [2024-06-27 17:56:52,781 INFO L231 Difference]: Finished difference. Result has 541 places, 799 transitions, 15735 flow [2024-06-27 17:56:52,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15124, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15735, PETRI_PLACES=541, PETRI_TRANSITIONS=799} [2024-06-27 17:56:52,782 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 499 predicate places. [2024-06-27 17:56:52,782 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 799 transitions, 15735 flow [2024-06-27 17:56:52,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:52,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:52,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:52,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 17:56:52,783 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:52,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:52,783 INFO L85 PathProgramCache]: Analyzing trace with hash -963020320, now seen corresponding path program 20 times [2024-06-27 17:56:52,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:52,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258316382] [2024-06-27 17:56:52,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:52,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:53,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:53,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258316382] [2024-06-27 17:56:53,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258316382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:53,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:53,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:56:53,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703567793] [2024-06-27 17:56:53,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:53,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:56:53,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:53,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:56:53,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:56:53,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:56:53,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 799 transitions, 15735 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:53,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:53,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:56:53,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:56,166 INFO L124 PetriNetUnfolderBase]: 3496/6230 cut-off events. [2024-06-27 17:56:56,166 INFO L125 PetriNetUnfolderBase]: For 264616/264616 co-relation queries the response was YES. [2024-06-27 17:56:56,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51406 conditions, 6230 events. 3496/6230 cut-off events. For 264616/264616 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 43885 event pairs, 858 based on Foata normal form. 2/5930 useless extension candidates. Maximal degree in co-relation 51151. Up to 5310 conditions per place. [2024-06-27 17:56:56,304 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 641 selfloop transitions, 188 changer transitions 0/836 dead transitions. [2024-06-27 17:56:56,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 836 transitions, 17903 flow [2024-06-27 17:56:56,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:56:56,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:56:56,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 17:56:56,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236842105263158 [2024-06-27 17:56:56,309 INFO L175 Difference]: Start difference. First operand has 541 places, 799 transitions, 15735 flow. Second operand 10 states and 161 transitions. [2024-06-27 17:56:56,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 836 transitions, 17903 flow [2024-06-27 17:56:59,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 836 transitions, 17284 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-27 17:56:59,422 INFO L231 Difference]: Finished difference. Result has 543 places, 802 transitions, 15712 flow [2024-06-27 17:56:59,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15116, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15712, PETRI_PLACES=543, PETRI_TRANSITIONS=802} [2024-06-27 17:56:59,423 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 501 predicate places. [2024-06-27 17:56:59,423 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 802 transitions, 15712 flow [2024-06-27 17:56:59,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:59,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:59,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:59,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 17:56:59,423 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:56:59,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:59,424 INFO L85 PathProgramCache]: Analyzing trace with hash -962804994, now seen corresponding path program 6 times [2024-06-27 17:56:59,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:59,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827441552] [2024-06-27 17:56:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:59,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:01,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:01,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827441552] [2024-06-27 17:57:01,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827441552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:01,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:01,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:57:01,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195781667] [2024-06-27 17:57:01,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:01,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:57:01,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:01,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:57:01,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:57:01,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:57:01,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 802 transitions, 15712 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:01,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:01,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:57:01,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:03,601 INFO L124 PetriNetUnfolderBase]: 3522/6268 cut-off events. [2024-06-27 17:57:03,601 INFO L125 PetriNetUnfolderBase]: For 268656/268656 co-relation queries the response was YES. [2024-06-27 17:57:03,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51437 conditions, 6268 events. 3522/6268 cut-off events. For 268656/268656 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 44133 event pairs, 880 based on Foata normal form. 2/5960 useless extension candidates. Maximal degree in co-relation 51180. Up to 5370 conditions per place. [2024-06-27 17:57:03,723 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 635 selfloop transitions, 195 changer transitions 0/837 dead transitions. [2024-06-27 17:57:03,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 837 transitions, 17764 flow [2024-06-27 17:57:03,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:57:03,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:57:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 168 transitions. [2024-06-27 17:57:03,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019138755980861 [2024-06-27 17:57:03,725 INFO L175 Difference]: Start difference. First operand has 543 places, 802 transitions, 15712 flow. Second operand 11 states and 168 transitions. [2024-06-27 17:57:03,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 837 transitions, 17764 flow [2024-06-27 17:57:06,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 837 transitions, 17212 flow, removed 95 selfloop flow, removed 7 redundant places. [2024-06-27 17:57:06,868 INFO L231 Difference]: Finished difference. Result has 547 places, 806 transitions, 15670 flow [2024-06-27 17:57:06,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15160, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15670, PETRI_PLACES=547, PETRI_TRANSITIONS=806} [2024-06-27 17:57:06,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 505 predicate places. [2024-06-27 17:57:06,869 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 806 transitions, 15670 flow [2024-06-27 17:57:06,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:06,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:06,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:06,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 17:57:06,870 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:06,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:06,870 INFO L85 PathProgramCache]: Analyzing trace with hash -769737184, now seen corresponding path program 21 times [2024-06-27 17:57:06,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:06,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795360479] [2024-06-27 17:57:06,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:06,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:07,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:07,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795360479] [2024-06-27 17:57:07,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795360479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:07,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:07,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:57:07,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389544194] [2024-06-27 17:57:07,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:07,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:57:07,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:07,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:57:07,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:57:08,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:57:08,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 806 transitions, 15670 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:08,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:08,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:57:08,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:10,495 INFO L124 PetriNetUnfolderBase]: 3538/6296 cut-off events. [2024-06-27 17:57:10,495 INFO L125 PetriNetUnfolderBase]: For 266218/266218 co-relation queries the response was YES. [2024-06-27 17:57:10,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51453 conditions, 6296 events. 3538/6296 cut-off events. For 266218/266218 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 44403 event pairs, 950 based on Foata normal form. 2/5990 useless extension candidates. Maximal degree in co-relation 51195. Up to 5586 conditions per place. [2024-06-27 17:57:10,622 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 685 selfloop transitions, 143 changer transitions 0/835 dead transitions. [2024-06-27 17:57:10,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 835 transitions, 17718 flow [2024-06-27 17:57:10,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:10,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:10,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 17:57:10,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40789473684210525 [2024-06-27 17:57:10,623 INFO L175 Difference]: Start difference. First operand has 547 places, 806 transitions, 15670 flow. Second operand 10 states and 155 transitions. [2024-06-27 17:57:10,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 835 transitions, 17718 flow [2024-06-27 17:57:13,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 835 transitions, 17274 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-27 17:57:13,782 INFO L231 Difference]: Finished difference. Result has 548 places, 808 transitions, 15667 flow [2024-06-27 17:57:13,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15226, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15667, PETRI_PLACES=548, PETRI_TRANSITIONS=808} [2024-06-27 17:57:13,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 506 predicate places. [2024-06-27 17:57:13,783 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 808 transitions, 15667 flow [2024-06-27 17:57:13,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:13,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:13,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:13,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 17:57:13,783 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:13,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:13,784 INFO L85 PathProgramCache]: Analyzing trace with hash -769742764, now seen corresponding path program 22 times [2024-06-27 17:57:13,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:13,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039896141] [2024-06-27 17:57:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:13,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:14,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:14,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039896141] [2024-06-27 17:57:14,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039896141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:14,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:14,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:57:14,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801105042] [2024-06-27 17:57:14,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:14,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:57:14,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:14,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:57:14,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:57:14,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:57:14,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 808 transitions, 15667 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:14,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:14,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:57:14,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:17,020 INFO L124 PetriNetUnfolderBase]: 3562/6346 cut-off events. [2024-06-27 17:57:17,020 INFO L125 PetriNetUnfolderBase]: For 275949/275949 co-relation queries the response was YES. [2024-06-27 17:57:17,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51924 conditions, 6346 events. 3562/6346 cut-off events. For 275949/275949 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 44861 event pairs, 938 based on Foata normal form. 2/6038 useless extension candidates. Maximal degree in co-relation 51665. Up to 5579 conditions per place. [2024-06-27 17:57:17,144 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 694 selfloop transitions, 141 changer transitions 0/842 dead transitions. [2024-06-27 17:57:17,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 842 transitions, 17821 flow [2024-06-27 17:57:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:17,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-27 17:57:17,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41842105263157897 [2024-06-27 17:57:17,146 INFO L175 Difference]: Start difference. First operand has 548 places, 808 transitions, 15667 flow. Second operand 10 states and 159 transitions. [2024-06-27 17:57:17,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 842 transitions, 17821 flow [2024-06-27 17:57:20,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 842 transitions, 17396 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-27 17:57:20,213 INFO L231 Difference]: Finished difference. Result has 551 places, 811 transitions, 15753 flow [2024-06-27 17:57:20,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15242, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15753, PETRI_PLACES=551, PETRI_TRANSITIONS=811} [2024-06-27 17:57:20,213 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 509 predicate places. [2024-06-27 17:57:20,213 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 811 transitions, 15753 flow [2024-06-27 17:57:20,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:20,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:20,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:20,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 17:57:20,214 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:20,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:20,214 INFO L85 PathProgramCache]: Analyzing trace with hash -769886914, now seen corresponding path program 23 times [2024-06-27 17:57:20,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:20,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000061469] [2024-06-27 17:57:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:20,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:21,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:21,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000061469] [2024-06-27 17:57:21,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000061469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:21,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:21,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:57:21,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132831473] [2024-06-27 17:57:21,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:21,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:57:21,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:21,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:57:21,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:57:21,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:57:21,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 811 transitions, 15753 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:21,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:21,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:57:21,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:23,645 INFO L124 PetriNetUnfolderBase]: 3586/6397 cut-off events. [2024-06-27 17:57:23,645 INFO L125 PetriNetUnfolderBase]: For 284164/284164 co-relation queries the response was YES. [2024-06-27 17:57:23,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52430 conditions, 6397 events. 3586/6397 cut-off events. For 284164/284164 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 45316 event pairs, 919 based on Foata normal form. 2/6089 useless extension candidates. Maximal degree in co-relation 52169. Up to 5543 conditions per place. [2024-06-27 17:57:23,774 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 689 selfloop transitions, 150 changer transitions 0/846 dead transitions. [2024-06-27 17:57:23,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 846 transitions, 17913 flow [2024-06-27 17:57:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:23,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-27 17:57:23,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-06-27 17:57:23,776 INFO L175 Difference]: Start difference. First operand has 551 places, 811 transitions, 15753 flow. Second operand 10 states and 160 transitions. [2024-06-27 17:57:23,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 846 transitions, 17913 flow [2024-06-27 17:57:27,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 846 transitions, 17442 flow, removed 102 selfloop flow, removed 7 redundant places. [2024-06-27 17:57:27,131 INFO L231 Difference]: Finished difference. Result has 555 places, 814 transitions, 15823 flow [2024-06-27 17:57:27,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15288, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15823, PETRI_PLACES=555, PETRI_TRANSITIONS=814} [2024-06-27 17:57:27,132 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 513 predicate places. [2024-06-27 17:57:27,132 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 814 transitions, 15823 flow [2024-06-27 17:57:27,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:27,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:27,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:27,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 17:57:27,133 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:27,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:27,133 INFO L85 PathProgramCache]: Analyzing trace with hash -764165058, now seen corresponding path program 7 times [2024-06-27 17:57:27,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:27,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946372169] [2024-06-27 17:57:27,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:27,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:28,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:28,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946372169] [2024-06-27 17:57:28,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946372169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:28,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:28,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:57:28,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962489385] [2024-06-27 17:57:28,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:28,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:57:28,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:28,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:57:28,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:57:29,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:57:29,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 814 transitions, 15823 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:29,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:29,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:57:29,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:31,567 INFO L124 PetriNetUnfolderBase]: 3598/6414 cut-off events. [2024-06-27 17:57:31,567 INFO L125 PetriNetUnfolderBase]: For 272761/272761 co-relation queries the response was YES. [2024-06-27 17:57:31,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52174 conditions, 6414 events. 3598/6414 cut-off events. For 272761/272761 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 45437 event pairs, 976 based on Foata normal form. 2/6097 useless extension candidates. Maximal degree in co-relation 51911. Up to 5675 conditions per place. [2024-06-27 17:57:31,699 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 692 selfloop transitions, 147 changer transitions 0/846 dead transitions. [2024-06-27 17:57:31,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 846 transitions, 17867 flow [2024-06-27 17:57:31,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:57:31,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:57:31,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-27 17:57:31,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39712918660287083 [2024-06-27 17:57:31,701 INFO L175 Difference]: Start difference. First operand has 555 places, 814 transitions, 15823 flow. Second operand 11 states and 166 transitions. [2024-06-27 17:57:31,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 846 transitions, 17867 flow [2024-06-27 17:57:34,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 846 transitions, 17392 flow, removed 98 selfloop flow, removed 7 redundant places. [2024-06-27 17:57:34,938 INFO L231 Difference]: Finished difference. Result has 559 places, 818 transitions, 15770 flow [2024-06-27 17:57:34,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15348, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15770, PETRI_PLACES=559, PETRI_TRANSITIONS=818} [2024-06-27 17:57:34,938 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 517 predicate places. [2024-06-27 17:57:34,938 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 818 transitions, 15770 flow [2024-06-27 17:57:34,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:34,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:34,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:34,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 17:57:34,939 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:34,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:34,939 INFO L85 PathProgramCache]: Analyzing trace with hash -890094338, now seen corresponding path program 24 times [2024-06-27 17:57:34,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:34,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198509747] [2024-06-27 17:57:34,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:34,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:35,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:35,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198509747] [2024-06-27 17:57:35,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198509747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:35,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:35,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:57:35,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961048061] [2024-06-27 17:57:35,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:35,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:57:35,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:35,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:57:35,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:57:35,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:57:35,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 818 transitions, 15770 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:35,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:35,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:57:35,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:38,376 INFO L124 PetriNetUnfolderBase]: 3614/6443 cut-off events. [2024-06-27 17:57:38,376 INFO L125 PetriNetUnfolderBase]: For 268917/268917 co-relation queries the response was YES. [2024-06-27 17:57:38,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52150 conditions, 6443 events. 3614/6443 cut-off events. For 268917/268917 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 45742 event pairs, 992 based on Foata normal form. 2/6124 useless extension candidates. Maximal degree in co-relation 51886. Up to 5773 conditions per place. [2024-06-27 17:57:38,513 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 711 selfloop transitions, 127 changer transitions 0/845 dead transitions. [2024-06-27 17:57:38,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 845 transitions, 17830 flow [2024-06-27 17:57:38,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:38,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:38,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-27 17:57:38,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026315789473684 [2024-06-27 17:57:38,515 INFO L175 Difference]: Start difference. First operand has 559 places, 818 transitions, 15770 flow. Second operand 10 states and 153 transitions. [2024-06-27 17:57:38,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 845 transitions, 17830 flow [2024-06-27 17:57:41,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 845 transitions, 17474 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-27 17:57:41,418 INFO L231 Difference]: Finished difference. Result has 560 places, 820 transitions, 15823 flow [2024-06-27 17:57:41,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15414, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15823, PETRI_PLACES=560, PETRI_TRANSITIONS=820} [2024-06-27 17:57:41,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 518 predicate places. [2024-06-27 17:57:41,418 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 820 transitions, 15823 flow [2024-06-27 17:57:41,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:41,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:41,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:41,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 17:57:41,419 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:41,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:41,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1688643774, now seen corresponding path program 25 times [2024-06-27 17:57:41,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:41,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032880523] [2024-06-27 17:57:41,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:41,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:42,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:42,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032880523] [2024-06-27 17:57:42,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032880523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:42,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:42,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:57:42,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902942740] [2024-06-27 17:57:42,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:42,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:57:42,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:42,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:57:42,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:57:42,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:57:42,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 820 transitions, 15823 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:42,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:42,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:57:42,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:45,053 INFO L124 PetriNetUnfolderBase]: 3630/6471 cut-off events. [2024-06-27 17:57:45,053 INFO L125 PetriNetUnfolderBase]: For 276777/276777 co-relation queries the response was YES. [2024-06-27 17:57:45,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52456 conditions, 6471 events. 3630/6471 cut-off events. For 276777/276777 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 45979 event pairs, 988 based on Foata normal form. 2/6152 useless extension candidates. Maximal degree in co-relation 52191. Up to 5746 conditions per place. [2024-06-27 17:57:45,190 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 709 selfloop transitions, 134 changer transitions 0/850 dead transitions. [2024-06-27 17:57:45,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 850 transitions, 17931 flow [2024-06-27 17:57:45,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-27 17:57:45,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131578947368421 [2024-06-27 17:57:45,191 INFO L175 Difference]: Start difference. First operand has 560 places, 820 transitions, 15823 flow. Second operand 10 states and 157 transitions. [2024-06-27 17:57:45,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 850 transitions, 17931 flow [2024-06-27 17:57:48,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 850 transitions, 17538 flow, removed 71 selfloop flow, removed 8 redundant places. [2024-06-27 17:57:48,347 INFO L231 Difference]: Finished difference. Result has 562 places, 822 transitions, 15858 flow [2024-06-27 17:57:48,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15430, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15858, PETRI_PLACES=562, PETRI_TRANSITIONS=822} [2024-06-27 17:57:48,347 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 520 predicate places. [2024-06-27 17:57:48,348 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 822 transitions, 15858 flow [2024-06-27 17:57:48,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:48,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:48,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:48,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 17:57:48,348 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:48,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:48,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1314445762, now seen corresponding path program 26 times [2024-06-27 17:57:48,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:48,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336193611] [2024-06-27 17:57:48,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:48,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:49,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:49,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336193611] [2024-06-27 17:57:49,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336193611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:49,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:49,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:57:49,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069737594] [2024-06-27 17:57:49,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:49,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:57:49,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:49,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:57:49,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:57:49,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:57:49,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 822 transitions, 15858 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:49,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:49,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:57:49,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:52,185 INFO L124 PetriNetUnfolderBase]: 3654/6522 cut-off events. [2024-06-27 17:57:52,185 INFO L125 PetriNetUnfolderBase]: For 284585/284585 co-relation queries the response was YES. [2024-06-27 17:57:52,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52946 conditions, 6522 events. 3654/6522 cut-off events. For 284585/284585 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 46454 event pairs, 984 based on Foata normal form. 2/6200 useless extension candidates. Maximal degree in co-relation 52680. Up to 5776 conditions per place. [2024-06-27 17:57:52,305 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 718 selfloop transitions, 132 changer transitions 0/857 dead transitions. [2024-06-27 17:57:52,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 857 transitions, 18072 flow [2024-06-27 17:57:52,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:52,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:52,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 17:57:52,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236842105263158 [2024-06-27 17:57:52,306 INFO L175 Difference]: Start difference. First operand has 562 places, 822 transitions, 15858 flow. Second operand 10 states and 161 transitions. [2024-06-27 17:57:52,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 857 transitions, 18072 flow [2024-06-27 17:57:55,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 857 transitions, 17662 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-27 17:57:55,334 INFO L231 Difference]: Finished difference. Result has 565 places, 825 transitions, 15942 flow [2024-06-27 17:57:55,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15448, PETRI_DIFFERENCE_MINUEND_PLACES=554, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15942, PETRI_PLACES=565, PETRI_TRANSITIONS=825} [2024-06-27 17:57:55,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 523 predicate places. [2024-06-27 17:57:55,336 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 825 transitions, 15942 flow [2024-06-27 17:57:55,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:55,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:55,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:55,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 17:57:55,337 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:57:55,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:55,337 INFO L85 PathProgramCache]: Analyzing trace with hash 614432010, now seen corresponding path program 8 times [2024-06-27 17:57:55,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:55,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754142144] [2024-06-27 17:57:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:55,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:56,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:56,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754142144] [2024-06-27 17:57:56,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754142144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:56,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:56,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:57:56,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271670172] [2024-06-27 17:57:56,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:56,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:57:56,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:56,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:57:56,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:57:56,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:57:56,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 825 transitions, 15942 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:56,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:56,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:57:56,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:59,345 INFO L124 PetriNetUnfolderBase]: 3650/6532 cut-off events. [2024-06-27 17:57:59,346 INFO L125 PetriNetUnfolderBase]: For 272056/272056 co-relation queries the response was YES. [2024-06-27 17:57:59,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52446 conditions, 6532 events. 3650/6532 cut-off events. For 272056/272056 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 46781 event pairs, 1411 based on Foata normal form. 2/6218 useless extension candidates. Maximal degree in co-relation 52178. Up to 6067 conditions per place. [2024-06-27 17:57:59,482 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 816 selfloop transitions, 24 changer transitions 0/847 dead transitions. [2024-06-27 17:57:59,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 847 transitions, 17808 flow [2024-06-27 17:57:59,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:57:59,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:57:59,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 158 transitions. [2024-06-27 17:57:59,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37799043062200954 [2024-06-27 17:57:59,484 INFO L175 Difference]: Start difference. First operand has 565 places, 825 transitions, 15942 flow. Second operand 11 states and 158 transitions. [2024-06-27 17:57:59,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 847 transitions, 17808 flow [2024-06-27 17:58:02,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 847 transitions, 17310 flow, removed 121 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:02,528 INFO L231 Difference]: Finished difference. Result has 569 places, 825 transitions, 15498 flow [2024-06-27 17:58:02,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15444, PETRI_DIFFERENCE_MINUEND_PLACES=558, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15498, PETRI_PLACES=569, PETRI_TRANSITIONS=825} [2024-06-27 17:58:02,529 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 527 predicate places. [2024-06-27 17:58:02,529 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 825 transitions, 15498 flow [2024-06-27 17:58:02,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:02,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:02,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:02,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 17:58:02,530 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:02,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:02,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1513747552, now seen corresponding path program 27 times [2024-06-27 17:58:02,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:02,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397282851] [2024-06-27 17:58:02,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:02,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:03,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:03,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397282851] [2024-06-27 17:58:03,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397282851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:03,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:03,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:58:03,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781386257] [2024-06-27 17:58:03,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:03,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:58:03,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:03,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:58:03,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:58:03,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:58:03,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 825 transitions, 15498 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:03,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:03,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:58:03,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:06,077 INFO L124 PetriNetUnfolderBase]: 3674/6562 cut-off events. [2024-06-27 17:58:06,077 INFO L125 PetriNetUnfolderBase]: For 269677/269677 co-relation queries the response was YES. [2024-06-27 17:58:06,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52278 conditions, 6562 events. 3674/6562 cut-off events. For 269677/269677 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 46779 event pairs, 1017 based on Foata normal form. 2/6242 useless extension candidates. Maximal degree in co-relation 52009. Up to 5856 conditions per place. [2024-06-27 17:58:06,240 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 721 selfloop transitions, 131 changer transitions 0/859 dead transitions. [2024-06-27 17:58:06,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 859 transitions, 17713 flow [2024-06-27 17:58:06,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:58:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:58:06,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-27 17:58:06,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40669856459330145 [2024-06-27 17:58:06,242 INFO L175 Difference]: Start difference. First operand has 569 places, 825 transitions, 15498 flow. Second operand 11 states and 170 transitions. [2024-06-27 17:58:06,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 859 transitions, 17713 flow [2024-06-27 17:58:09,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 859 transitions, 17665 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 17:58:09,323 INFO L231 Difference]: Finished difference. Result has 572 places, 828 transitions, 15947 flow [2024-06-27 17:58:09,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15450, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15947, PETRI_PLACES=572, PETRI_TRANSITIONS=828} [2024-06-27 17:58:09,324 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 530 predicate places. [2024-06-27 17:58:09,324 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 828 transitions, 15947 flow [2024-06-27 17:58:09,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:09,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:09,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:09,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 17:58:09,324 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:09,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:09,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1489192254, now seen corresponding path program 28 times [2024-06-27 17:58:09,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:09,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866595102] [2024-06-27 17:58:09,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:09,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:10,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:10,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866595102] [2024-06-27 17:58:10,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866595102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:10,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:10,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:58:10,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9973513] [2024-06-27 17:58:10,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:10,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:58:10,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:10,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:58:10,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:58:10,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:58:10,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 828 transitions, 15947 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:10,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:10,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:58:10,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:12,675 INFO L124 PetriNetUnfolderBase]: 3698/6616 cut-off events. [2024-06-27 17:58:12,676 INFO L125 PetriNetUnfolderBase]: For 286029/286029 co-relation queries the response was YES. [2024-06-27 17:58:12,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53387 conditions, 6616 events. 3698/6616 cut-off events. For 286029/286029 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 47301 event pairs, 1017 based on Foata normal form. 2/6291 useless extension candidates. Maximal degree in co-relation 53116. Up to 5873 conditions per place. [2024-06-27 17:58:12,815 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 723 selfloop transitions, 131 changer transitions 0/861 dead transitions. [2024-06-27 17:58:12,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 861 transitions, 18139 flow [2024-06-27 17:58:12,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:58:12,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:58:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 17:58:12,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41578947368421054 [2024-06-27 17:58:12,816 INFO L175 Difference]: Start difference. First operand has 572 places, 828 transitions, 15947 flow. Second operand 10 states and 158 transitions. [2024-06-27 17:58:12,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 861 transitions, 18139 flow [2024-06-27 17:58:16,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 861 transitions, 17681 flow, removed 106 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:16,075 INFO L231 Difference]: Finished difference. Result has 576 places, 831 transitions, 15994 flow [2024-06-27 17:58:16,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15489, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15994, PETRI_PLACES=576, PETRI_TRANSITIONS=831} [2024-06-27 17:58:16,076 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 534 predicate places. [2024-06-27 17:58:16,076 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 831 transitions, 15994 flow [2024-06-27 17:58:16,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:16,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:16,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:16,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 17:58:16,076 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:16,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:16,077 INFO L85 PathProgramCache]: Analyzing trace with hash 156645132, now seen corresponding path program 9 times [2024-06-27 17:58:16,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:16,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431363958] [2024-06-27 17:58:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:16,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:17,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:17,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431363958] [2024-06-27 17:58:17,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431363958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:17,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:17,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:58:17,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150965059] [2024-06-27 17:58:17,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:17,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:58:17,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:17,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:58:17,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:58:17,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:58:17,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 831 transitions, 15994 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:17,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:17,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:58:17,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:20,541 INFO L124 PetriNetUnfolderBase]: 3711/6648 cut-off events. [2024-06-27 17:58:20,542 INFO L125 PetriNetUnfolderBase]: For 285247/285247 co-relation queries the response was YES. [2024-06-27 17:58:20,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53177 conditions, 6648 events. 3711/6648 cut-off events. For 285247/285247 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 47721 event pairs, 1066 based on Foata normal form. 2/6323 useless extension candidates. Maximal degree in co-relation 52904. Up to 5881 conditions per place. [2024-06-27 17:58:20,687 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 713 selfloop transitions, 151 changer transitions 0/871 dead transitions. [2024-06-27 17:58:20,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 871 transitions, 18149 flow [2024-06-27 17:58:20,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 17:58:20,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 17:58:20,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 204 transitions. [2024-06-27 17:58:20,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38345864661654133 [2024-06-27 17:58:20,688 INFO L175 Difference]: Start difference. First operand has 576 places, 831 transitions, 15994 flow. Second operand 14 states and 204 transitions. [2024-06-27 17:58:20,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 871 transitions, 18149 flow [2024-06-27 17:58:24,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 581 places, 871 transitions, 17669 flow, removed 109 selfloop flow, removed 8 redundant places. [2024-06-27 17:58:24,036 INFO L231 Difference]: Finished difference. Result has 582 places, 833 transitions, 15903 flow [2024-06-27 17:58:24,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15514, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=680, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=15903, PETRI_PLACES=582, PETRI_TRANSITIONS=833} [2024-06-27 17:58:24,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 540 predicate places. [2024-06-27 17:58:24,037 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 833 transitions, 15903 flow [2024-06-27 17:58:24,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:24,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:24,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:24,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 17:58:24,038 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:24,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:24,038 INFO L85 PathProgramCache]: Analyzing trace with hash 163787036, now seen corresponding path program 29 times [2024-06-27 17:58:24,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:24,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119181496] [2024-06-27 17:58:24,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:24,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:24,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:24,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119181496] [2024-06-27 17:58:24,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119181496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:24,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:24,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:58:24,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767255442] [2024-06-27 17:58:24,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:24,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:58:24,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:24,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:58:24,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:58:25,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:58:25,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 833 transitions, 15903 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:25,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:25,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:58:25,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:27,531 INFO L124 PetriNetUnfolderBase]: 3727/6664 cut-off events. [2024-06-27 17:58:27,531 INFO L125 PetriNetUnfolderBase]: For 283174/283174 co-relation queries the response was YES. [2024-06-27 17:58:27,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53183 conditions, 6664 events. 3727/6664 cut-off events. For 283174/283174 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 47753 event pairs, 1025 based on Foata normal form. 2/6334 useless extension candidates. Maximal degree in co-relation 52909. Up to 5868 conditions per place. [2024-06-27 17:58:27,680 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 715 selfloop transitions, 142 changer transitions 0/864 dead transitions. [2024-06-27 17:58:27,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 864 transitions, 18063 flow [2024-06-27 17:58:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:58:27,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:58:27,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-27 17:58:27,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41842105263157897 [2024-06-27 17:58:27,681 INFO L175 Difference]: Start difference. First operand has 582 places, 833 transitions, 15903 flow. Second operand 10 states and 159 transitions. [2024-06-27 17:58:27,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 864 transitions, 18063 flow [2024-06-27 17:58:31,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 864 transitions, 17700 flow, removed 32 selfloop flow, removed 12 redundant places. [2024-06-27 17:58:31,204 INFO L231 Difference]: Finished difference. Result has 580 places, 835 transitions, 16000 flow [2024-06-27 17:58:31,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15540, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16000, PETRI_PLACES=580, PETRI_TRANSITIONS=835} [2024-06-27 17:58:31,205 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 538 predicate places. [2024-06-27 17:58:31,205 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 835 transitions, 16000 flow [2024-06-27 17:58:31,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:31,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:31,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:31,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 17:58:31,205 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:31,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:31,206 INFO L85 PathProgramCache]: Analyzing trace with hash -517705822, now seen corresponding path program 10 times [2024-06-27 17:58:31,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:31,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560598887] [2024-06-27 17:58:31,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:31,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:32,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:32,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560598887] [2024-06-27 17:58:32,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560598887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:32,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:32,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:58:32,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059986405] [2024-06-27 17:58:32,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:32,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:58:32,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:32,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:58:32,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:58:32,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:58:32,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 835 transitions, 16000 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:32,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:32,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:58:32,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:34,722 INFO L124 PetriNetUnfolderBase]: 3757/6708 cut-off events. [2024-06-27 17:58:34,723 INFO L125 PetriNetUnfolderBase]: For 304073/304073 co-relation queries the response was YES. [2024-06-27 17:58:34,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53908 conditions, 6708 events. 3757/6708 cut-off events. For 304073/304073 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 48008 event pairs, 888 based on Foata normal form. 2/6371 useless extension candidates. Maximal degree in co-relation 53633. Up to 4616 conditions per place. [2024-06-27 17:58:34,865 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 563 selfloop transitions, 298 changer transitions 0/868 dead transitions. [2024-06-27 17:58:34,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 868 transitions, 18600 flow [2024-06-27 17:58:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:58:34,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:58:34,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 17:58:34,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44473684210526315 [2024-06-27 17:58:34,867 INFO L175 Difference]: Start difference. First operand has 580 places, 835 transitions, 16000 flow. Second operand 10 states and 169 transitions. [2024-06-27 17:58:34,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 868 transitions, 18600 flow [2024-06-27 17:58:38,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 581 places, 868 transitions, 18158 flow, removed 81 selfloop flow, removed 8 redundant places. [2024-06-27 17:58:38,353 INFO L231 Difference]: Finished difference. Result has 582 places, 839 transitions, 16325 flow [2024-06-27 17:58:38,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15558, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=835, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16325, PETRI_PLACES=582, PETRI_TRANSITIONS=839} [2024-06-27 17:58:38,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 540 predicate places. [2024-06-27 17:58:38,354 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 839 transitions, 16325 flow [2024-06-27 17:58:38,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:38,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:38,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:38,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 17:58:38,354 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:38,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:38,355 INFO L85 PathProgramCache]: Analyzing trace with hash 164054442, now seen corresponding path program 11 times [2024-06-27 17:58:38,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:38,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975451898] [2024-06-27 17:58:38,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:38,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:39,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:39,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975451898] [2024-06-27 17:58:39,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975451898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:39,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:39,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:58:39,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013151788] [2024-06-27 17:58:39,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:39,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:58:39,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:39,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:58:39,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:58:39,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:58:39,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 839 transitions, 16325 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:39,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:39,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:58:39,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:42,603 INFO L124 PetriNetUnfolderBase]: 3770/6727 cut-off events. [2024-06-27 17:58:42,603 INFO L125 PetriNetUnfolderBase]: For 304957/304957 co-relation queries the response was YES. [2024-06-27 17:58:42,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54450 conditions, 6727 events. 3770/6727 cut-off events. For 304957/304957 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 48151 event pairs, 1022 based on Foata normal form. 2/6387 useless extension candidates. Maximal degree in co-relation 54174. Up to 5858 conditions per place. [2024-06-27 17:58:42,749 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 713 selfloop transitions, 152 changer transitions 0/872 dead transitions. [2024-06-27 17:58:42,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 872 transitions, 18433 flow [2024-06-27 17:58:42,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:58:42,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:58:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-06-27 17:58:42,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41148325358851673 [2024-06-27 17:58:42,750 INFO L175 Difference]: Start difference. First operand has 582 places, 839 transitions, 16325 flow. Second operand 11 states and 172 transitions. [2024-06-27 17:58:42,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 872 transitions, 18433 flow [2024-06-27 17:58:46,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 872 transitions, 17903 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:46,173 INFO L231 Difference]: Finished difference. Result has 587 places, 841 transitions, 16194 flow [2024-06-27 17:58:46,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15797, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16194, PETRI_PLACES=587, PETRI_TRANSITIONS=841} [2024-06-27 17:58:46,173 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 545 predicate places. [2024-06-27 17:58:46,173 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 841 transitions, 16194 flow [2024-06-27 17:58:46,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:46,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:46,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:46,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 17:58:46,174 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:46,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:46,174 INFO L85 PathProgramCache]: Analyzing trace with hash -37294278, now seen corresponding path program 12 times [2024-06-27 17:58:46,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:46,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428708751] [2024-06-27 17:58:46,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:46,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:47,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:47,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428708751] [2024-06-27 17:58:47,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428708751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:47,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:47,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:58:47,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680530047] [2024-06-27 17:58:47,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:47,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:58:47,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:47,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:58:47,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:58:47,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:58:47,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 841 transitions, 16194 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:47,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:47,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:58:47,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:51,001 INFO L124 PetriNetUnfolderBase]: 3783/6759 cut-off events. [2024-06-27 17:58:51,001 INFO L125 PetriNetUnfolderBase]: For 308890/308890 co-relation queries the response was YES. [2024-06-27 17:58:51,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54129 conditions, 6759 events. 3783/6759 cut-off events. For 308890/308890 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 48577 event pairs, 1087 based on Foata normal form. 2/6421 useless extension candidates. Maximal degree in co-relation 53852. Up to 6048 conditions per place. [2024-06-27 17:58:51,129 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 729 selfloop transitions, 141 changer transitions 0/877 dead transitions. [2024-06-27 17:58:51,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 877 transitions, 18335 flow [2024-06-27 17:58:51,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 17:58:51,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 17:58:51,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 189 transitions. [2024-06-27 17:58:51,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3825910931174089 [2024-06-27 17:58:51,131 INFO L175 Difference]: Start difference. First operand has 587 places, 841 transitions, 16194 flow. Second operand 13 states and 189 transitions. [2024-06-27 17:58:51,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 877 transitions, 18335 flow [2024-06-27 17:58:54,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 877 transitions, 17966 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-27 17:58:54,521 INFO L231 Difference]: Finished difference. Result has 591 places, 843 transitions, 16204 flow [2024-06-27 17:58:54,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15825, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16204, PETRI_PLACES=591, PETRI_TRANSITIONS=843} [2024-06-27 17:58:54,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 549 predicate places. [2024-06-27 17:58:54,522 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 843 transitions, 16204 flow [2024-06-27 17:58:54,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:54,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:54,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:54,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 17:58:54,522 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:58:54,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:54,522 INFO L85 PathProgramCache]: Analyzing trace with hash 164063742, now seen corresponding path program 13 times [2024-06-27 17:58:54,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:54,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66246846] [2024-06-27 17:58:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:54,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:56,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:56,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66246846] [2024-06-27 17:58:56,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66246846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:56,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:56,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:58:56,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313237522] [2024-06-27 17:58:56,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:56,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:58:56,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:56,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:58:56,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:58:56,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:58:56,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 843 transitions, 16204 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:56,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:56,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:58:56,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:58,996 INFO L124 PetriNetUnfolderBase]: 3813/6789 cut-off events. [2024-06-27 17:58:58,996 INFO L125 PetriNetUnfolderBase]: For 328043/328043 co-relation queries the response was YES. [2024-06-27 17:58:59,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54770 conditions, 6789 events. 3813/6789 cut-off events. For 328043/328043 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 48551 event pairs, 1019 based on Foata normal form. 2/6440 useless extension candidates. Maximal degree in co-relation 54492. Up to 5848 conditions per place. [2024-06-27 17:58:59,139 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 712 selfloop transitions, 164 changer transitions 0/883 dead transitions. [2024-06-27 17:58:59,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 883 transitions, 18714 flow [2024-06-27 17:58:59,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:58:59,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:58:59,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-27 17:58:59,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41228070175438597 [2024-06-27 17:58:59,140 INFO L175 Difference]: Start difference. First operand has 591 places, 843 transitions, 16204 flow. Second operand 12 states and 188 transitions. [2024-06-27 17:58:59,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 883 transitions, 18714 flow [2024-06-27 17:59:02,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 591 places, 883 transitions, 18363 flow, removed 36 selfloop flow, removed 11 redundant places. [2024-06-27 17:59:02,822 INFO L231 Difference]: Finished difference. Result has 592 places, 847 transitions, 16378 flow [2024-06-27 17:59:02,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15853, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16378, PETRI_PLACES=592, PETRI_TRANSITIONS=847} [2024-06-27 17:59:02,823 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 550 predicate places. [2024-06-27 17:59:02,823 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 847 transitions, 16378 flow [2024-06-27 17:59:02,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:02,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:02,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:02,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 17:59:02,824 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:02,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:02,824 INFO L85 PathProgramCache]: Analyzing trace with hash 300456074, now seen corresponding path program 30 times [2024-06-27 17:59:02,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:02,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927392509] [2024-06-27 17:59:02,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:02,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:04,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:04,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927392509] [2024-06-27 17:59:04,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927392509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:04,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:04,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:59:04,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588292494] [2024-06-27 17:59:04,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:04,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:59:04,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:04,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:59:04,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:59:04,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:59:04,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 847 transitions, 16378 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:04,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:04,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:59:04,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:06,730 INFO L124 PetriNetUnfolderBase]: 3829/6837 cut-off events. [2024-06-27 17:59:06,730 INFO L125 PetriNetUnfolderBase]: For 339316/339316 co-relation queries the response was YES. [2024-06-27 17:59:06,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55395 conditions, 6837 events. 3829/6837 cut-off events. For 339316/339316 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 49176 event pairs, 1456 based on Foata normal form. 2/6496 useless extension candidates. Maximal degree in co-relation 55116. Up to 6397 conditions per place. [2024-06-27 17:59:06,881 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 845 selfloop transitions, 18 changer transitions 0/870 dead transitions. [2024-06-27 17:59:06,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 870 transitions, 18458 flow [2024-06-27 17:59:06,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:59:06,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:59:06,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 152 transitions. [2024-06-27 17:59:06,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-27 17:59:06,882 INFO L175 Difference]: Start difference. First operand has 592 places, 847 transitions, 16378 flow. Second operand 11 states and 152 transitions. [2024-06-27 17:59:06,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 870 transitions, 18458 flow [2024-06-27 17:59:10,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 870 transitions, 18176 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-27 17:59:10,836 INFO L231 Difference]: Finished difference. Result has 595 places, 849 transitions, 16311 flow [2024-06-27 17:59:10,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=16096, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16311, PETRI_PLACES=595, PETRI_TRANSITIONS=849} [2024-06-27 17:59:10,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 553 predicate places. [2024-06-27 17:59:10,837 INFO L495 AbstractCegarLoop]: Abstraction has has 595 places, 849 transitions, 16311 flow [2024-06-27 17:59:10,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:10,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:10,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:10,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 17:59:10,837 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:10,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:10,838 INFO L85 PathProgramCache]: Analyzing trace with hash -766143906, now seen corresponding path program 31 times [2024-06-27 17:59:10,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:10,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246927718] [2024-06-27 17:59:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:10,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:11,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:11,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246927718] [2024-06-27 17:59:11,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246927718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:11,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:11,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:59:11,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716996840] [2024-06-27 17:59:11,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:11,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:59:11,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:11,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:59:11,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:59:12,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:59:12,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 849 transitions, 16311 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:12,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:12,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:59:12,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:14,949 INFO L124 PetriNetUnfolderBase]: 3845/6848 cut-off events. [2024-06-27 17:59:14,950 INFO L125 PetriNetUnfolderBase]: For 344095/344095 co-relation queries the response was YES. [2024-06-27 17:59:15,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55670 conditions, 6848 events. 3845/6848 cut-off events. For 344095/344095 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 49024 event pairs, 933 based on Foata normal form. 2/6498 useless extension candidates. Maximal degree in co-relation 55389. Up to 5863 conditions per place. [2024-06-27 17:59:15,088 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 680 selfloop transitions, 192 changer transitions 0/879 dead transitions. [2024-06-27 17:59:15,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 879 transitions, 18479 flow [2024-06-27 17:59:15,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:59:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:59:15,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-27 17:59:15,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-06-27 17:59:15,090 INFO L175 Difference]: Start difference. First operand has 595 places, 849 transitions, 16311 flow. Second operand 10 states and 160 transitions. [2024-06-27 17:59:15,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 879 transitions, 18479 flow [2024-06-27 17:59:18,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 879 transitions, 18260 flow, removed 85 selfloop flow, removed 10 redundant places. [2024-06-27 17:59:18,741 INFO L231 Difference]: Finished difference. Result has 595 places, 851 transitions, 16659 flow [2024-06-27 17:59:18,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=16092, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16659, PETRI_PLACES=595, PETRI_TRANSITIONS=851} [2024-06-27 17:59:18,742 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 553 predicate places. [2024-06-27 17:59:18,742 INFO L495 AbstractCegarLoop]: Abstraction has has 595 places, 851 transitions, 16659 flow [2024-06-27 17:59:18,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:18,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:18,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:18,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 17:59:18,743 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:18,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:18,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1286667182, now seen corresponding path program 14 times [2024-06-27 17:59:18,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:18,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399617925] [2024-06-27 17:59:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:18,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:20,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:20,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399617925] [2024-06-27 17:59:20,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399617925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:20,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:20,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:59:20,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853353493] [2024-06-27 17:59:20,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:20,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:59:20,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:20,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:59:20,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:59:20,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:59:20,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 851 transitions, 16659 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:20,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:20,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:59:20,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:23,295 INFO L124 PetriNetUnfolderBase]: 3841/6842 cut-off events. [2024-06-27 17:59:23,296 INFO L125 PetriNetUnfolderBase]: For 328136/328136 co-relation queries the response was YES. [2024-06-27 17:59:23,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55466 conditions, 6842 events. 3841/6842 cut-off events. For 328136/328136 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 49055 event pairs, 1036 based on Foata normal form. 2/6491 useless extension candidates. Maximal degree in co-relation 55186. Up to 6034 conditions per place. [2024-06-27 17:59:23,442 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 728 selfloop transitions, 143 changer transitions 0/878 dead transitions. [2024-06-27 17:59:23,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 878 transitions, 18657 flow [2024-06-27 17:59:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:59:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:59:23,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 17:59:23,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41578947368421054 [2024-06-27 17:59:23,443 INFO L175 Difference]: Start difference. First operand has 595 places, 851 transitions, 16659 flow. Second operand 10 states and 158 transitions. [2024-06-27 17:59:23,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 878 transitions, 18657 flow [2024-06-27 17:59:27,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 878 transitions, 18019 flow, removed 119 selfloop flow, removed 9 redundant places. [2024-06-27 17:59:27,321 INFO L231 Difference]: Finished difference. Result has 596 places, 851 transitions, 16328 flow [2024-06-27 17:59:27,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=16035, PETRI_DIFFERENCE_MINUEND_PLACES=586, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16328, PETRI_PLACES=596, PETRI_TRANSITIONS=851} [2024-06-27 17:59:27,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 554 predicate places. [2024-06-27 17:59:27,330 INFO L495 AbstractCegarLoop]: Abstraction has has 596 places, 851 transitions, 16328 flow [2024-06-27 17:59:27,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:27,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:27,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:27,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 17:59:27,331 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:27,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:27,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1306811485, now seen corresponding path program 3 times [2024-06-27 17:59:27,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:27,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865348308] [2024-06-27 17:59:27,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:27,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:28,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:28,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865348308] [2024-06-27 17:59:28,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865348308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:28,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:28,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:59:28,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907636036] [2024-06-27 17:59:28,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:28,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:59:28,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:28,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:59:28,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:59:28,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:59:28,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 851 transitions, 16328 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:28,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:28,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:59:28,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:31,548 INFO L124 PetriNetUnfolderBase]: 3838/6843 cut-off events. [2024-06-27 17:59:31,548 INFO L125 PetriNetUnfolderBase]: For 304530/304530 co-relation queries the response was YES. [2024-06-27 17:59:31,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54091 conditions, 6843 events. 3838/6843 cut-off events. For 304530/304530 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 49150 event pairs, 1185 based on Foata normal form. 2/6499 useless extension candidates. Maximal degree in co-relation 53811. Up to 6241 conditions per place. [2024-06-27 17:59:31,710 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 810 selfloop transitions, 65 changer transitions 0/882 dead transitions. [2024-06-27 17:59:31,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 606 places, 882 transitions, 18477 flow [2024-06-27 17:59:31,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:59:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:59:31,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 163 transitions. [2024-06-27 17:59:31,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38995215311004783 [2024-06-27 17:59:31,711 INFO L175 Difference]: Start difference. First operand has 596 places, 851 transitions, 16328 flow. Second operand 11 states and 163 transitions. [2024-06-27 17:59:31,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 606 places, 882 transitions, 18477 flow [2024-06-27 17:59:35,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 882 transitions, 18180 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 17:59:35,885 INFO L231 Difference]: Finished difference. Result has 598 places, 853 transitions, 16317 flow [2024-06-27 17:59:35,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=16031, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=786, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16317, PETRI_PLACES=598, PETRI_TRANSITIONS=853} [2024-06-27 17:59:35,886 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 556 predicate places. [2024-06-27 17:59:35,886 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 853 transitions, 16317 flow [2024-06-27 17:59:35,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:35,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:35,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:35,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-27 17:59:35,886 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:35,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:35,887 INFO L85 PathProgramCache]: Analyzing trace with hash -753082142, now seen corresponding path program 32 times [2024-06-27 17:59:35,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:35,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928098307] [2024-06-27 17:59:35,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:35,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:37,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:37,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:37,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928098307] [2024-06-27 17:59:37,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928098307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:37,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:37,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:59:37,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587924724] [2024-06-27 17:59:37,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:37,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:59:37,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:37,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:59:37,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:59:37,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:59:37,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 853 transitions, 16317 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:37,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:37,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:59:37,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:39,938 INFO L124 PetriNetUnfolderBase]: 3854/6865 cut-off events. [2024-06-27 17:59:39,938 INFO L125 PetriNetUnfolderBase]: For 309765/309765 co-relation queries the response was YES. [2024-06-27 17:59:40,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54429 conditions, 6865 events. 3854/6865 cut-off events. For 309765/309765 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 49182 event pairs, 942 based on Foata normal form. 2/6515 useless extension candidates. Maximal degree in co-relation 54149. Up to 5903 conditions per place. [2024-06-27 17:59:40,071 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 685 selfloop transitions, 189 changer transitions 0/881 dead transitions. [2024-06-27 17:59:40,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 881 transitions, 18463 flow [2024-06-27 17:59:40,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:59:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:59:40,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-27 17:59:40,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105263157894737 [2024-06-27 17:59:40,073 INFO L175 Difference]: Start difference. First operand has 598 places, 853 transitions, 16317 flow. Second operand 10 states and 156 transitions. [2024-06-27 17:59:40,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 881 transitions, 18463 flow [2024-06-27 17:59:43,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 881 transitions, 18195 flow, removed 72 selfloop flow, removed 9 redundant places. [2024-06-27 17:59:43,848 INFO L231 Difference]: Finished difference. Result has 599 places, 855 transitions, 16616 flow [2024-06-27 17:59:43,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=16051, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16616, PETRI_PLACES=599, PETRI_TRANSITIONS=855} [2024-06-27 17:59:43,848 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 557 predicate places. [2024-06-27 17:59:43,848 INFO L495 AbstractCegarLoop]: Abstraction has has 599 places, 855 transitions, 16616 flow [2024-06-27 17:59:43,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:43,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:43,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:43,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-27 17:59:43,849 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:43,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:43,849 INFO L85 PathProgramCache]: Analyzing trace with hash 320877424, now seen corresponding path program 15 times [2024-06-27 17:59:43,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:43,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51283919] [2024-06-27 17:59:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:43,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:45,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:45,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51283919] [2024-06-27 17:59:45,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51283919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:45,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:45,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:59:45,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741352690] [2024-06-27 17:59:45,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:45,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:59:45,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:45,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:59:45,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:59:45,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:59:45,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 855 transitions, 16616 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:45,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:45,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:59:45,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:48,351 INFO L124 PetriNetUnfolderBase]: 3850/6859 cut-off events. [2024-06-27 17:59:48,351 INFO L125 PetriNetUnfolderBase]: For 292598/292598 co-relation queries the response was YES. [2024-06-27 17:59:48,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54281 conditions, 6859 events. 3850/6859 cut-off events. For 292598/292598 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 49159 event pairs, 905 based on Foata normal form. 2/6508 useless extension candidates. Maximal degree in co-relation 54000. Up to 4740 conditions per place. [2024-06-27 17:59:48,491 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 568 selfloop transitions, 306 changer transitions 0/881 dead transitions. [2024-06-27 17:59:48,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 881 transitions, 18820 flow [2024-06-27 17:59:48,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:59:48,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:59:48,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-27 17:59:48,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342105263157895 [2024-06-27 17:59:48,492 INFO L175 Difference]: Start difference. First operand has 599 places, 855 transitions, 16616 flow. Second operand 10 states and 165 transitions. [2024-06-27 17:59:48,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 881 transitions, 18820 flow [2024-06-27 17:59:52,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 881 transitions, 18219 flow, removed 113 selfloop flow, removed 8 redundant places. [2024-06-27 17:59:52,213 INFO L231 Difference]: Finished difference. Result has 601 places, 855 transitions, 16633 flow [2024-06-27 17:59:52,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=16015, PETRI_DIFFERENCE_MINUEND_PLACES=591, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16633, PETRI_PLACES=601, PETRI_TRANSITIONS=855} [2024-06-27 17:59:52,214 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 559 predicate places. [2024-06-27 17:59:52,214 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 855 transitions, 16633 flow [2024-06-27 17:59:52,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:52,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:52,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:52,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-27 17:59:52,214 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:59:52,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:52,215 INFO L85 PathProgramCache]: Analyzing trace with hash -745453786, now seen corresponding path program 16 times [2024-06-27 17:59:52,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:52,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924211800] [2024-06-27 17:59:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:52,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:53,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:53,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924211800] [2024-06-27 17:59:53,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924211800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:53,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:53,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:59:53,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412811660] [2024-06-27 17:59:53,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:53,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:59:53,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:53,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:59:53,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:59:53,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 17:59:53,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 855 transitions, 16633 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:53,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:53,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 17:59:53,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:56,519 INFO L124 PetriNetUnfolderBase]: 3863/6876 cut-off events. [2024-06-27 17:59:56,519 INFO L125 PetriNetUnfolderBase]: For 289769/289769 co-relation queries the response was YES. [2024-06-27 17:59:56,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54580 conditions, 6876 events. 3863/6876 cut-off events. For 289769/289769 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 49241 event pairs, 941 based on Foata normal form. 2/6524 useless extension candidates. Maximal degree in co-relation 54298. Up to 5811 conditions per place. [2024-06-27 17:59:56,679 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 682 selfloop transitions, 203 changer transitions 0/892 dead transitions. [2024-06-27 17:59:56,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 892 transitions, 19039 flow [2024-06-27 17:59:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:59:56,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:59:56,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-27 17:59:56,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144736842105263 [2024-06-27 17:59:56,684 INFO L175 Difference]: Start difference. First operand has 601 places, 855 transitions, 16633 flow. Second operand 12 states and 189 transitions. [2024-06-27 17:59:56,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 892 transitions, 19039 flow [2024-06-27 18:00:00,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 601 places, 892 transitions, 18372 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-27 18:00:00,359 INFO L231 Difference]: Finished difference. Result has 602 places, 857 transitions, 16480 flow [2024-06-27 18:00:00,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15972, PETRI_DIFFERENCE_MINUEND_PLACES=590, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16480, PETRI_PLACES=602, PETRI_TRANSITIONS=857} [2024-06-27 18:00:00,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 560 predicate places. [2024-06-27 18:00:00,360 INFO L495 AbstractCegarLoop]: Abstraction has has 602 places, 857 transitions, 16480 flow [2024-06-27 18:00:00,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:00,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:00,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:00,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-27 18:00:00,361 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:00,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:00,361 INFO L85 PathProgramCache]: Analyzing trace with hash -745722556, now seen corresponding path program 17 times [2024-06-27 18:00:00,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:00,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518782993] [2024-06-27 18:00:00,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:00,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:01,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:01,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518782993] [2024-06-27 18:00:01,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518782993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:01,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:01,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 18:00:01,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477800145] [2024-06-27 18:00:01,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:01,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 18:00:01,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:01,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 18:00:01,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 18:00:01,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 18:00:01,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 857 transitions, 16480 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:01,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:01,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 18:00:01,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:04,791 INFO L124 PetriNetUnfolderBase]: 3876/6897 cut-off events. [2024-06-27 18:00:04,791 INFO L125 PetriNetUnfolderBase]: For 289980/289980 co-relation queries the response was YES. [2024-06-27 18:00:04,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54293 conditions, 6897 events. 3876/6897 cut-off events. For 289980/289980 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 49416 event pairs, 963 based on Foata normal form. 2/6540 useless extension candidates. Maximal degree in co-relation 54012. Up to 4764 conditions per place. [2024-06-27 18:00:04,929 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 604 selfloop transitions, 276 changer transitions 0/887 dead transitions. [2024-06-27 18:00:04,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 887 transitions, 19064 flow [2024-06-27 18:00:04,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:00:04,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:00:04,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-27 18:00:04,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 18:00:04,931 INFO L175 Difference]: Start difference. First operand has 602 places, 857 transitions, 16480 flow. Second operand 10 states and 171 transitions. [2024-06-27 18:00:04,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 887 transitions, 19064 flow [2024-06-27 18:00:08,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 887 transitions, 17933 flow, removed 60 selfloop flow, removed 14 redundant places. [2024-06-27 18:00:08,846 INFO L231 Difference]: Finished difference. Result has 598 places, 859 transitions, 16007 flow [2024-06-27 18:00:08,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15375, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16007, PETRI_PLACES=598, PETRI_TRANSITIONS=859} [2024-06-27 18:00:08,847 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 556 predicate places. [2024-06-27 18:00:08,847 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 859 transitions, 16007 flow [2024-06-27 18:00:08,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:08,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:08,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:08,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-27 18:00:08,848 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:08,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:08,848 INFO L85 PathProgramCache]: Analyzing trace with hash -753087722, now seen corresponding path program 33 times [2024-06-27 18:00:08,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:08,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290239962] [2024-06-27 18:00:08,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:08,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:10,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:10,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290239962] [2024-06-27 18:00:10,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290239962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:10,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:10,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 18:00:10,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146260713] [2024-06-27 18:00:10,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:10,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 18:00:10,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:10,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 18:00:10,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 18:00:10,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 18:00:10,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 859 transitions, 16007 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:10,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:10,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 18:00:10,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:13,137 INFO L124 PetriNetUnfolderBase]: 3884/6919 cut-off events. [2024-06-27 18:00:13,138 INFO L125 PetriNetUnfolderBase]: For 275745/275745 co-relation queries the response was YES. [2024-06-27 18:00:13,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53365 conditions, 6919 events. 3884/6919 cut-off events. For 275745/275745 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 49612 event pairs, 937 based on Foata normal form. 2/6561 useless extension candidates. Maximal degree in co-relation 53086. Up to 5924 conditions per place. [2024-06-27 18:00:13,310 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 696 selfloop transitions, 189 changer transitions 0/892 dead transitions. [2024-06-27 18:00:13,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 892 transitions, 18269 flow [2024-06-27 18:00:13,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:00:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:00:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-27 18:00:13,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-06-27 18:00:13,311 INFO L175 Difference]: Start difference. First operand has 598 places, 859 transitions, 16007 flow. Second operand 10 states and 160 transitions. [2024-06-27 18:00:13,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 892 transitions, 18269 flow [2024-06-27 18:00:17,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 892 transitions, 17666 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-27 18:00:17,289 INFO L231 Difference]: Finished difference. Result has 601 places, 862 transitions, 16043 flow [2024-06-27 18:00:17,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15404, PETRI_DIFFERENCE_MINUEND_PLACES=590, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16043, PETRI_PLACES=601, PETRI_TRANSITIONS=862} [2024-06-27 18:00:17,290 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 559 predicate places. [2024-06-27 18:00:17,290 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 862 transitions, 16043 flow [2024-06-27 18:00:17,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:17,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:17,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:17,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-27 18:00:17,290 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:17,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:17,291 INFO L85 PathProgramCache]: Analyzing trace with hash -752872396, now seen corresponding path program 18 times [2024-06-27 18:00:17,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:17,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755206386] [2024-06-27 18:00:17,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:17,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:18,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:18,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755206386] [2024-06-27 18:00:18,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755206386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:18,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:18,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 18:00:18,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648825443] [2024-06-27 18:00:18,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:18,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 18:00:18,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:18,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 18:00:18,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 18:00:18,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 18:00:18,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 862 transitions, 16043 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:18,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:18,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 18:00:18,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:21,853 INFO L124 PetriNetUnfolderBase]: 3880/6913 cut-off events. [2024-06-27 18:00:21,854 INFO L125 PetriNetUnfolderBase]: For 257413/257413 co-relation queries the response was YES. [2024-06-27 18:00:22,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52519 conditions, 6913 events. 3880/6913 cut-off events. For 257413/257413 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 49553 event pairs, 951 based on Foata normal form. 2/6554 useless extension candidates. Maximal degree in co-relation 52239. Up to 5937 conditions per place. [2024-06-27 18:00:22,036 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 691 selfloop transitions, 191 changer transitions 0/889 dead transitions. [2024-06-27 18:00:22,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 889 transitions, 18027 flow [2024-06-27 18:00:22,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:00:22,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:00:22,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 167 transitions. [2024-06-27 18:00:22,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39952153110047844 [2024-06-27 18:00:22,038 INFO L175 Difference]: Start difference. First operand has 601 places, 862 transitions, 16043 flow. Second operand 11 states and 167 transitions. [2024-06-27 18:00:22,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 889 transitions, 18027 flow [2024-06-27 18:00:25,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 889 transitions, 17360 flow, removed 148 selfloop flow, removed 7 redundant places. [2024-06-27 18:00:25,859 INFO L231 Difference]: Finished difference. Result has 605 places, 862 transitions, 15763 flow [2024-06-27 18:00:25,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15376, PETRI_DIFFERENCE_MINUEND_PLACES=594, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15763, PETRI_PLACES=605, PETRI_TRANSITIONS=862} [2024-06-27 18:00:25,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 563 predicate places. [2024-06-27 18:00:25,860 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 862 transitions, 15763 flow [2024-06-27 18:00:25,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:25,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:25,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:25,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-27 18:00:25,860 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:25,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:25,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1129522536, now seen corresponding path program 1 times [2024-06-27 18:00:25,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:25,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427406690] [2024-06-27 18:00:25,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:25,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:27,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:27,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427406690] [2024-06-27 18:00:27,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427406690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:27,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:27,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 18:00:27,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386803602] [2024-06-27 18:00:27,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:27,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 18:00:27,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:27,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 18:00:27,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-06-27 18:00:27,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 18:00:27,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 862 transitions, 15763 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:27,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:27,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 18:00:27,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:30,072 INFO L124 PetriNetUnfolderBase]: 3904/6974 cut-off events. [2024-06-27 18:00:30,072 INFO L125 PetriNetUnfolderBase]: For 257847/257847 co-relation queries the response was YES. [2024-06-27 18:00:30,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52389 conditions, 6974 events. 3904/6974 cut-off events. For 257847/257847 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 50293 event pairs, 987 based on Foata normal form. 2/6619 useless extension candidates. Maximal degree in co-relation 52108. Up to 5843 conditions per place. [2024-06-27 18:00:30,215 INFO L140 encePairwiseOnDemand]: 23/38 looper letters, 746 selfloop transitions, 161 changer transitions 0/914 dead transitions. [2024-06-27 18:00:30,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 914 transitions, 18139 flow [2024-06-27 18:00:30,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 18:00:30,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 18:00:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 216 transitions. [2024-06-27 18:00:30,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40601503759398494 [2024-06-27 18:00:30,217 INFO L175 Difference]: Start difference. First operand has 605 places, 862 transitions, 15763 flow. Second operand 14 states and 216 transitions. [2024-06-27 18:00:30,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 914 transitions, 18139 flow [2024-06-27 18:00:33,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 914 transitions, 17746 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 18:00:33,916 INFO L231 Difference]: Finished difference. Result has 610 places, 865 transitions, 15941 flow [2024-06-27 18:00:33,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15370, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=15941, PETRI_PLACES=610, PETRI_TRANSITIONS=865} [2024-06-27 18:00:33,917 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 568 predicate places. [2024-06-27 18:00:33,917 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 865 transitions, 15941 flow [2024-06-27 18:00:33,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:33,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:33,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:33,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-27 18:00:33,917 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:33,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:33,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1657174590, now seen corresponding path program 2 times [2024-06-27 18:00:33,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:33,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074110590] [2024-06-27 18:00:33,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:33,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:35,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:35,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074110590] [2024-06-27 18:00:35,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074110590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:35,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:35,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:00:35,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249222457] [2024-06-27 18:00:35,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:35,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:00:35,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:35,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:00:35,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:00:35,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 18:00:35,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 865 transitions, 15941 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:35,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:35,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 18:00:35,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:38,984 INFO L124 PetriNetUnfolderBase]: 4178/7388 cut-off events. [2024-06-27 18:00:38,984 INFO L125 PetriNetUnfolderBase]: For 262286/262289 co-relation queries the response was YES. [2024-06-27 18:00:39,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56121 conditions, 7388 events. 4178/7388 cut-off events. For 262286/262289 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 53102 event pairs, 959 based on Foata normal form. 4/7000 useless extension candidates. Maximal degree in co-relation 55838. Up to 6071 conditions per place. [2024-06-27 18:00:39,173 INFO L140 encePairwiseOnDemand]: 22/38 looper letters, 707 selfloop transitions, 259 changer transitions 0/973 dead transitions. [2024-06-27 18:00:39,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 973 transitions, 19551 flow [2024-06-27 18:00:39,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:00:39,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:00:39,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-27 18:00:39,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421052631578947 [2024-06-27 18:00:39,175 INFO L175 Difference]: Start difference. First operand has 610 places, 865 transitions, 15941 flow. Second operand 10 states and 168 transitions. [2024-06-27 18:00:39,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 973 transitions, 19551 flow [2024-06-27 18:00:43,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 973 transitions, 19030 flow, removed 107 selfloop flow, removed 11 redundant places. [2024-06-27 18:00:43,999 INFO L231 Difference]: Finished difference. Result has 615 places, 943 transitions, 17871 flow [2024-06-27 18:00:43,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=15424, PETRI_DIFFERENCE_MINUEND_PLACES=599, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17871, PETRI_PLACES=615, PETRI_TRANSITIONS=943} [2024-06-27 18:00:44,000 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 573 predicate places. [2024-06-27 18:00:44,015 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 943 transitions, 17871 flow [2024-06-27 18:00:44,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:44,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:44,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:44,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-27 18:00:44,016 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:44,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:44,017 INFO L85 PathProgramCache]: Analyzing trace with hash -2111775430, now seen corresponding path program 3 times [2024-06-27 18:00:44,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:44,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148539494] [2024-06-27 18:00:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:44,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:45,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:45,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148539494] [2024-06-27 18:00:45,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148539494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:45,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:45,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 18:00:45,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938167666] [2024-06-27 18:00:45,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:45,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 18:00:45,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:45,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 18:00:45,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-06-27 18:00:46,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 18:00:46,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 943 transitions, 17871 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:46,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:46,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 18:00:46,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:50,150 INFO L124 PetriNetUnfolderBase]: 4241/7534 cut-off events. [2024-06-27 18:00:50,150 INFO L125 PetriNetUnfolderBase]: For 308813/308813 co-relation queries the response was YES. [2024-06-27 18:00:50,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59814 conditions, 7534 events. 4241/7534 cut-off events. For 308813/308813 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 54561 event pairs, 1189 based on Foata normal form. 2/7150 useless extension candidates. Maximal degree in co-relation 59524. Up to 6675 conditions per place. [2024-06-27 18:00:50,421 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 838 selfloop transitions, 144 changer transitions 0/989 dead transitions. [2024-06-27 18:00:50,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 989 transitions, 20964 flow [2024-06-27 18:00:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 18:00:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 18:00:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 210 transitions. [2024-06-27 18:00:50,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39473684210526316 [2024-06-27 18:00:50,423 INFO L175 Difference]: Start difference. First operand has 615 places, 943 transitions, 17871 flow. Second operand 14 states and 210 transitions. [2024-06-27 18:00:50,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 989 transitions, 20964 flow [2024-06-27 18:00:55,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 989 transitions, 20494 flow, removed 161 selfloop flow, removed 3 redundant places. [2024-06-27 18:00:55,175 INFO L231 Difference]: Finished difference. Result has 627 places, 947 transitions, 18037 flow [2024-06-27 18:00:55,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=17561, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=800, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18037, PETRI_PLACES=627, PETRI_TRANSITIONS=947} [2024-06-27 18:00:55,176 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 585 predicate places. [2024-06-27 18:00:55,176 INFO L495 AbstractCegarLoop]: Abstraction has has 627 places, 947 transitions, 18037 flow [2024-06-27 18:00:55,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:55,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:55,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:55,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-27 18:00:55,176 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:00:55,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:55,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1633223370, now seen corresponding path program 4 times [2024-06-27 18:00:55,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:55,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655314282] [2024-06-27 18:00:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:55,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:56,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:56,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655314282] [2024-06-27 18:00:56,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655314282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:56,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:56,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 18:00:56,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523158375] [2024-06-27 18:00:56,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:56,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 18:00:56,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:56,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 18:00:56,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-06-27 18:00:57,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 18:00:57,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 627 places, 947 transitions, 18037 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:57,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:57,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 18:00:57,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:00,949 INFO L124 PetriNetUnfolderBase]: 4265/7583 cut-off events. [2024-06-27 18:01:00,949 INFO L125 PetriNetUnfolderBase]: For 313206/313206 co-relation queries the response was YES. [2024-06-27 18:01:01,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59926 conditions, 7583 events. 4265/7583 cut-off events. For 313206/313206 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 55005 event pairs, 1197 based on Foata normal form. 2/7192 useless extension candidates. Maximal degree in co-relation 59633. Up to 6737 conditions per place. [2024-06-27 18:01:01,237 INFO L140 encePairwiseOnDemand]: 24/38 looper letters, 857 selfloop transitions, 127 changer transitions 0/991 dead transitions. [2024-06-27 18:01:01,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 640 places, 991 transitions, 20564 flow [2024-06-27 18:01:01,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 18:01:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 18:01:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 210 transitions. [2024-06-27 18:01:01,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39473684210526316 [2024-06-27 18:01:01,239 INFO L175 Difference]: Start difference. First operand has 627 places, 947 transitions, 18037 flow. Second operand 14 states and 210 transitions. [2024-06-27 18:01:01,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 640 places, 991 transitions, 20564 flow [2024-06-27 18:01:05,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 631 places, 991 transitions, 20364 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-27 18:01:05,475 INFO L231 Difference]: Finished difference. Result has 633 places, 950 transitions, 18349 flow [2024-06-27 18:01:05,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=17837, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=947, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=820, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18349, PETRI_PLACES=633, PETRI_TRANSITIONS=950} [2024-06-27 18:01:05,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 591 predicate places. [2024-06-27 18:01:05,476 INFO L495 AbstractCegarLoop]: Abstraction has has 633 places, 950 transitions, 18349 flow [2024-06-27 18:01:05,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:05,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:05,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:05,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-27 18:01:05,477 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:01:05,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:05,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1800350880, now seen corresponding path program 5 times [2024-06-27 18:01:05,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:05,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622826343] [2024-06-27 18:01:05,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:05,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:06,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:06,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622826343] [2024-06-27 18:01:06,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622826343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:06,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:06,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:01:06,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956971708] [2024-06-27 18:01:06,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:06,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:01:06,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:06,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:01:06,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:01:06,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 18:01:06,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 950 transitions, 18349 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:06,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:06,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 18:01:06,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:10,721 INFO L124 PetriNetUnfolderBase]: 4386/7854 cut-off events. [2024-06-27 18:01:10,721 INFO L125 PetriNetUnfolderBase]: For 379845/379848 co-relation queries the response was YES. [2024-06-27 18:01:10,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62797 conditions, 7854 events. 4386/7854 cut-off events. For 379845/379848 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 57511 event pairs, 1143 based on Foata normal form. 4/7441 useless extension candidates. Maximal degree in co-relation 62501. Up to 6793 conditions per place. [2024-06-27 18:01:10,890 INFO L140 encePairwiseOnDemand]: 22/38 looper letters, 823 selfloop transitions, 166 changer transitions 0/996 dead transitions. [2024-06-27 18:01:10,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 996 transitions, 21319 flow [2024-06-27 18:01:10,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:01:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:01:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-27 18:01:10,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 18:01:10,892 INFO L175 Difference]: Start difference. First operand has 633 places, 950 transitions, 18349 flow. Second operand 10 states and 171 transitions. [2024-06-27 18:01:10,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 996 transitions, 21319 flow [2024-06-27 18:01:16,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 632 places, 996 transitions, 20879 flow, removed 114 selfloop flow, removed 10 redundant places. [2024-06-27 18:01:16,216 INFO L231 Difference]: Finished difference. Result has 635 places, 957 transitions, 18570 flow [2024-06-27 18:01:16,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=17909, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=950, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=784, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18570, PETRI_PLACES=635, PETRI_TRANSITIONS=957} [2024-06-27 18:01:16,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 593 predicate places. [2024-06-27 18:01:16,217 INFO L495 AbstractCegarLoop]: Abstraction has has 635 places, 957 transitions, 18570 flow [2024-06-27 18:01:16,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:16,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:16,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:16,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-27 18:01:16,218 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:01:16,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:16,218 INFO L85 PathProgramCache]: Analyzing trace with hash 2097687040, now seen corresponding path program 6 times [2024-06-27 18:01:16,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:16,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771958485] [2024-06-27 18:01:16,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:16,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:17,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:17,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771958485] [2024-06-27 18:01:17,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771958485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:17,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:17,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 18:01:17,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217214996] [2024-06-27 18:01:17,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:17,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 18:01:17,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:17,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 18:01:17,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-06-27 18:01:18,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 18:01:18,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 635 places, 957 transitions, 18570 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:18,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:18,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 18:01:18,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:22,549 INFO L124 PetriNetUnfolderBase]: 4410/7908 cut-off events. [2024-06-27 18:01:22,549 INFO L125 PetriNetUnfolderBase]: For 395508/395508 co-relation queries the response was YES. [2024-06-27 18:01:22,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63360 conditions, 7908 events. 4410/7908 cut-off events. For 395508/395508 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 58045 event pairs, 1246 based on Foata normal form. 2/7497 useless extension candidates. Maximal degree in co-relation 63061. Up to 6859 conditions per place. [2024-06-27 18:01:22,750 INFO L140 encePairwiseOnDemand]: 23/38 looper letters, 876 selfloop transitions, 119 changer transitions 0/1002 dead transitions. [2024-06-27 18:01:22,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 1002 transitions, 21125 flow [2024-06-27 18:01:22,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 18:01:22,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 18:01:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 211 transitions. [2024-06-27 18:01:22,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3966165413533835 [2024-06-27 18:01:22,752 INFO L175 Difference]: Start difference. First operand has 635 places, 957 transitions, 18570 flow. Second operand 14 states and 211 transitions. [2024-06-27 18:01:22,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 648 places, 1002 transitions, 21125 flow [2024-06-27 18:01:29,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 1002 transitions, 20548 flow, removed 117 selfloop flow, removed 7 redundant places. [2024-06-27 18:01:29,149 INFO L231 Difference]: Finished difference. Result has 643 places, 959 transitions, 18383 flow [2024-06-27 18:01:29,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=17997, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=957, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=838, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18383, PETRI_PLACES=643, PETRI_TRANSITIONS=959} [2024-06-27 18:01:29,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 601 predicate places. [2024-06-27 18:01:29,150 INFO L495 AbstractCegarLoop]: Abstraction has has 643 places, 959 transitions, 18383 flow [2024-06-27 18:01:29,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:29,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:29,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:29,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-27 18:01:29,150 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:01:29,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:29,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1742157590, now seen corresponding path program 7 times [2024-06-27 18:01:29,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:29,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800754328] [2024-06-27 18:01:29,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:29,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:30,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:30,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800754328] [2024-06-27 18:01:30,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800754328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:30,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:30,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 18:01:30,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138610464] [2024-06-27 18:01:30,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:30,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 18:01:30,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:30,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 18:01:30,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 18:01:30,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 18:01:30,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 643 places, 959 transitions, 18383 flow. Second operand has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:30,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:30,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 18:01:30,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:34,879 INFO L124 PetriNetUnfolderBase]: 4450/7991 cut-off events. [2024-06-27 18:01:34,879 INFO L125 PetriNetUnfolderBase]: For 398286/398286 co-relation queries the response was YES. [2024-06-27 18:01:35,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63808 conditions, 7991 events. 4450/7991 cut-off events. For 398286/398286 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 58859 event pairs, 739 based on Foata normal form. 2/7609 useless extension candidates. Maximal degree in co-relation 63507. Up to 6458 conditions per place. [2024-06-27 18:01:35,073 INFO L140 encePairwiseOnDemand]: 24/38 looper letters, 777 selfloop transitions, 219 changer transitions 0/1003 dead transitions. [2024-06-27 18:01:35,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 653 places, 1003 transitions, 20893 flow [2024-06-27 18:01:35,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:01:35,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:01:35,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-27 18:01:35,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42822966507177035 [2024-06-27 18:01:35,074 INFO L175 Difference]: Start difference. First operand has 643 places, 959 transitions, 18383 flow. Second operand 11 states and 179 transitions. [2024-06-27 18:01:35,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 653 places, 1003 transitions, 20893 flow [2024-06-27 18:01:40,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 1003 transitions, 20604 flow, removed 50 selfloop flow, removed 9 redundant places. [2024-06-27 18:01:40,738 INFO L231 Difference]: Finished difference. Result has 646 places, 965 transitions, 18835 flow [2024-06-27 18:01:40,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=18096, PETRI_DIFFERENCE_MINUEND_PLACES=634, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=959, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18835, PETRI_PLACES=646, PETRI_TRANSITIONS=965} [2024-06-27 18:01:40,738 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 604 predicate places. [2024-06-27 18:01:40,739 INFO L495 AbstractCegarLoop]: Abstraction has has 646 places, 965 transitions, 18835 flow [2024-06-27 18:01:40,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:40,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:40,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:40,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-27 18:01:40,739 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:01:40,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:40,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1032316664, now seen corresponding path program 8 times [2024-06-27 18:01:40,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:40,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321172188] [2024-06-27 18:01:40,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:40,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:42,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:42,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321172188] [2024-06-27 18:01:42,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321172188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:42,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:42,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 18:01:42,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463379841] [2024-06-27 18:01:42,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:42,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 18:01:42,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:42,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 18:01:42,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 18:01:42,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2024-06-27 18:01:42,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 965 transitions, 18835 flow. Second operand has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:42,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:42,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2024-06-27 18:01:42,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:46,586 INFO L124 PetriNetUnfolderBase]: 4483/8056 cut-off events. [2024-06-27 18:01:46,586 INFO L125 PetriNetUnfolderBase]: For 408806/408806 co-relation queries the response was YES. [2024-06-27 18:01:46,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64489 conditions, 8056 events. 4483/8056 cut-off events. For 408806/408806 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 59423 event pairs, 1234 based on Foata normal form. 4/7636 useless extension candidates. Maximal degree in co-relation 64186. Up to 6724 conditions per place. [2024-06-27 18:01:46,777 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 723 selfloop transitions, 272 changer transitions 0/1002 dead transitions. [2024-06-27 18:01:46,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 656 places, 1002 transitions, 21291 flow [2024-06-27 18:01:46,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:01:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:01:46,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-27 18:01:46,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42822966507177035 [2024-06-27 18:01:46,817 INFO L175 Difference]: Start difference. First operand has 646 places, 965 transitions, 18835 flow. Second operand 11 states and 179 transitions. [2024-06-27 18:01:46,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 656 places, 1002 transitions, 21291 flow [2024-06-27 18:01:53,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 648 places, 1002 transitions, 20610 flow, removed 132 selfloop flow, removed 8 redundant places. [2024-06-27 18:01:53,119 INFO L231 Difference]: Finished difference. Result has 649 places, 967 transitions, 18782 flow [2024-06-27 18:01:53,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=18154, PETRI_DIFFERENCE_MINUEND_PLACES=638, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18782, PETRI_PLACES=649, PETRI_TRANSITIONS=967} [2024-06-27 18:01:53,120 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 607 predicate places. [2024-06-27 18:01:53,120 INFO L495 AbstractCegarLoop]: Abstraction has has 649 places, 967 transitions, 18782 flow [2024-06-27 18:01:53,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:53,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:53,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:53,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-27 18:01:53,121 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:01:53,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:53,121 INFO L85 PathProgramCache]: Analyzing trace with hash 224040984, now seen corresponding path program 1 times [2024-06-27 18:01:53,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:53,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167239433] [2024-06-27 18:01:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:53,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat