./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe008_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe008_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe008_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe008_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:03:21,752 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:03:21,801 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:03:21,804 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:03:21,805 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:03:21,818 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:03:21,818 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:03:21,819 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:03:21,819 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:03:21,819 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:03:21,820 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:03:21,820 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:03:21,821 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:03:21,821 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:03:21,821 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:03:21,821 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:03:21,822 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:03:21,822 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:03:21,822 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:03:21,822 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:03:21,823 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:03:21,823 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:03:21,823 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:03:21,824 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:03:21,824 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:03:21,824 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:03:21,824 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:03:21,825 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:03:21,825 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:03:21,825 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:03:21,825 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:03:21,825 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:03:21,826 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:03:21,826 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:03:21,826 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:03:21,826 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:03:21,827 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:03:21,827 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:03:21,827 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:03:21,827 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:03:21,827 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:03:21,828 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:03:21,828 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:03:21,828 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:03:21,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:03:21,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:03:21,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:03:22,000 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:03:22,016 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:03:22,017 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe008_tso.yml/witness.yml [2024-06-21 20:03:22,120 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:03:22,120 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:03:22,120 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe008_tso.i [2024-06-21 20:03:23,138 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:03:23,377 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:03:23,380 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe008_tso.i [2024-06-21 20:03:23,396 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7672d8b1d/c48a4f888c274b3e968ce7a828bf44bc/FLAGea8d428e7 [2024-06-21 20:03:23,410 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7672d8b1d/c48a4f888c274b3e968ce7a828bf44bc [2024-06-21 20:03:23,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:03:23,412 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:03:23,413 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:03:23,413 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:03:23,416 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:03:23,417 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:03:22" (1/2) ... [2024-06-21 20:03:23,418 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2187eeaf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:23, skipping insertion in model container [2024-06-21 20:03:23,418 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:03:22" (1/2) ... [2024-06-21 20:03:23,419 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7b8aa959 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:23, skipping insertion in model container [2024-06-21 20:03:23,420 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:03:23" (2/2) ... [2024-06-21 20:03:23,420 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2187eeaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:23, skipping insertion in model container [2024-06-21 20:03:23,420 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:03:23" (2/2) ... [2024-06-21 20:03:23,421 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:03:23,455 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:03:23,456 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (y == 0 || y == 1)) [2024-06-21 20:03:23,456 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (y == 0 || y == 1)) [2024-06-21 20:03:23,456 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (y == 0 || y == 1)) [2024-06-21 20:03:23,456 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:03:23,457 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-21 20:03:23,492 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:03:23,829 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:03:23,840 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:03:23,949 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:03:23,986 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:03:23,986 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:23 WrapperNode [2024-06-21 20:03:23,986 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:03:23,987 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:03:23,987 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:03:23,987 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:03:23,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:23" (1/1) ... [2024-06-21 20:03:24,021 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:23" (1/1) ... [2024-06-21 20:03:24,052 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-21 20:03:24,053 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:03:24,053 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:03:24,054 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:03:24,054 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:03:24,069 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:23" (1/1) ... [2024-06-21 20:03:24,069 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:23" (1/1) ... [2024-06-21 20:03:24,073 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:23" (1/1) ... [2024-06-21 20:03:24,093 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 20:03:24,093 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:23" (1/1) ... [2024-06-21 20:03:24,094 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:23" (1/1) ... [2024-06-21 20:03:24,111 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:23" (1/1) ... [2024-06-21 20:03:24,112 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:23" (1/1) ... [2024-06-21 20:03:24,113 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:23" (1/1) ... [2024-06-21 20:03:24,117 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:23" (1/1) ... [2024-06-21 20:03:24,119 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:03:24,122 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:03:24,123 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:03:24,123 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:03:24,124 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:23" (1/1) ... [2024-06-21 20:03:24,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:03:24,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:03:24,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 20:03:24,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 20:03:24,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:03:24,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:03:24,181 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:03:24,181 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:03:24,182 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:03:24,182 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:03:24,182 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:03:24,182 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:03:24,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:03:24,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:03:24,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:03:24,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:03:24,184 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:03:24,301 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:03:24,302 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:03:24,428 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:03:24,428 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:03:24,494 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:03:24,504 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:03:24,504 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:03:24 BoogieIcfgContainer [2024-06-21 20:03:24,505 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:03:24,506 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:03:24,506 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:03:24,508 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:03:24,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:03:22" (1/4) ... [2024-06-21 20:03:24,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b182506 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:03:24, skipping insertion in model container [2024-06-21 20:03:24,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:03:23" (2/4) ... [2024-06-21 20:03:24,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b182506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:03:24, skipping insertion in model container [2024-06-21 20:03:24,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:23" (3/4) ... [2024-06-21 20:03:24,510 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b182506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:03:24, skipping insertion in model container [2024-06-21 20:03:24,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:03:24" (4/4) ... [2024-06-21 20:03:24,511 INFO L112 eAbstractionObserver]: Analyzing ICFG safe008_tso.i [2024-06-21 20:03:24,527 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:03:24,528 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:03:24,528 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:03:24,574 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:03:24,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 20:03:24,635 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 20:03:24,636 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:03:24,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:03:24,637 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 20:03:24,641 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 20:03:24,648 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:03:24,654 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;@392f374f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:03:24,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:03:24,656 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:03:24,656 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:03:24,656 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:03:24,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:24,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:03:24,657 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:24,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:24,661 INFO L85 PathProgramCache]: Analyzing trace with hash 219930474, now seen corresponding path program 1 times [2024-06-21 20:03:24,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:24,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840285379] [2024-06-21 20:03:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:24,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:25,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:25,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:25,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840285379] [2024-06-21 20:03:25,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840285379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:25,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:25,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:03:25,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993081996] [2024-06-21 20:03:25,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:25,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:03:25,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:25,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:03:25,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:03:25,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 20:03:25,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:25,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:25,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 20:03:25,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:25,229 INFO L124 PetriNetUnfolderBase]: 607/1010 cut-off events. [2024-06-21 20:03:25,230 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-06-21 20:03:25,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 1010 events. 607/1010 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4943 event pairs, 393 based on Foata normal form. 1/955 useless extension candidates. Maximal degree in co-relation 2000. Up to 937 conditions per place. [2024-06-21 20:03:25,243 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 28 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-21 20:03:25,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 161 flow [2024-06-21 20:03:25,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:03:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:03:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-06-21 20:03:25,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-06-21 20:03:25,255 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 83 transitions. [2024-06-21 20:03:25,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 161 flow [2024-06-21 20:03:25,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:25,259 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 20:03:25,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-21 20:03:25,264 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 20:03:25,265 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 20:03:25,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:25,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:25,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:25,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:03:25,265 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:25,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:25,267 INFO L85 PathProgramCache]: Analyzing trace with hash 899799369, now seen corresponding path program 1 times [2024-06-21 20:03:25,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:25,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388255754] [2024-06-21 20:03:25,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:25,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:25,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:25,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388255754] [2024-06-21 20:03:25,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388255754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:25,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:25,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:03:25,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007786520] [2024-06-21 20:03:25,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:25,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:03:25,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:25,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:03:25,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:03:25,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-21 20:03:25,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:25,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:25,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-21 20:03:25,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:25,580 INFO L124 PetriNetUnfolderBase]: 608/1023 cut-off events. [2024-06-21 20:03:25,580 INFO L125 PetriNetUnfolderBase]: For 186/192 co-relation queries the response was YES. [2024-06-21 20:03:25,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2342 conditions, 1023 events. 608/1023 cut-off events. For 186/192 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4980 event pairs, 321 based on Foata normal form. 8/1026 useless extension candidates. Maximal degree in co-relation 2330. Up to 911 conditions per place. [2024-06-21 20:03:25,588 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 37 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2024-06-21 20:03:25,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 258 flow [2024-06-21 20:03:25,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:03:25,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:03:25,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-06-21 20:03:25,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.70625 [2024-06-21 20:03:25,592 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 113 transitions. [2024-06-21 20:03:25,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 258 flow [2024-06-21 20:03:25,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:25,597 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 170 flow [2024-06-21 20:03:25,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-06-21 20:03:25,598 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-21 20:03:25,598 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 170 flow [2024-06-21 20:03:25,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:25,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:25,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:25,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:03:25,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:25,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:25,604 INFO L85 PathProgramCache]: Analyzing trace with hash 2123977079, now seen corresponding path program 1 times [2024-06-21 20:03:25,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:25,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659361771] [2024-06-21 20:03:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:25,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:25,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:25,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659361771] [2024-06-21 20:03:25,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659361771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:25,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:25,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:25,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622510303] [2024-06-21 20:03:25,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:25,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:25,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:25,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:25,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:25,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:25,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:25,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:25,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:25,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:25,871 INFO L124 PetriNetUnfolderBase]: 775/1261 cut-off events. [2024-06-21 20:03:25,871 INFO L125 PetriNetUnfolderBase]: For 881/889 co-relation queries the response was YES. [2024-06-21 20:03:25,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3463 conditions, 1261 events. 775/1261 cut-off events. For 881/889 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6139 event pairs, 289 based on Foata normal form. 10/1266 useless extension candidates. Maximal degree in co-relation 3448. Up to 1131 conditions per place. [2024-06-21 20:03:25,877 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 57 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-06-21 20:03:25,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 80 transitions, 446 flow [2024-06-21 20:03:25,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-21 20:03:25,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.685 [2024-06-21 20:03:25,879 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 170 flow. Second operand 5 states and 137 transitions. [2024-06-21 20:03:25,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 80 transitions, 446 flow [2024-06-21 20:03:25,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 80 transitions, 440 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-21 20:03:25,882 INFO L231 Difference]: Finished difference. Result has 52 places, 56 transitions, 303 flow [2024-06-21 20:03:25,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=303, PETRI_PLACES=52, PETRI_TRANSITIONS=56} [2024-06-21 20:03:25,883 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-21 20:03:25,883 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 56 transitions, 303 flow [2024-06-21 20:03:25,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:25,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:25,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:25,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:03:25,884 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:25,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:25,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1032521654, now seen corresponding path program 1 times [2024-06-21 20:03:25,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:25,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277792956] [2024-06-21 20:03:25,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:25,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:26,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:26,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277792956] [2024-06-21 20:03:26,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277792956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:26,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:26,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:26,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507362043] [2024-06-21 20:03:26,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:26,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:26,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:26,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:26,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:26,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:26,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 56 transitions, 303 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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) [2024-06-21 20:03:26,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:26,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:26,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:26,250 INFO L124 PetriNetUnfolderBase]: 804/1306 cut-off events. [2024-06-21 20:03:26,250 INFO L125 PetriNetUnfolderBase]: For 1684/1697 co-relation queries the response was YES. [2024-06-21 20:03:26,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4116 conditions, 1306 events. 804/1306 cut-off events. For 1684/1697 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6394 event pairs, 246 based on Foata normal form. 23/1324 useless extension candidates. Maximal degree in co-relation 4096. Up to 1104 conditions per place. [2024-06-21 20:03:26,258 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 64 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-06-21 20:03:26,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 564 flow [2024-06-21 20:03:26,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:26,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:26,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-21 20:03:26,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2024-06-21 20:03:26,261 INFO L175 Difference]: Start difference. First operand has 52 places, 56 transitions, 303 flow. Second operand 6 states and 161 transitions. [2024-06-21 20:03:26,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 564 flow [2024-06-21 20:03:26,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 89 transitions, 558 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-21 20:03:26,268 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 347 flow [2024-06-21 20:03:26,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-06-21 20:03:26,269 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-21 20:03:26,269 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 347 flow [2024-06-21 20:03:26,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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) [2024-06-21 20:03:26,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:26,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:26,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:03:26,270 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:26,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:26,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1088277451, now seen corresponding path program 1 times [2024-06-21 20:03:26,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:26,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718160079] [2024-06-21 20:03:26,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:26,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:26,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:26,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718160079] [2024-06-21 20:03:26,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718160079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:26,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:26,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:26,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407737591] [2024-06-21 20:03:26,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:26,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:26,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:26,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:26,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:26,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:26,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 347 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:26,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:26,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:26,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:26,614 INFO L124 PetriNetUnfolderBase]: 949/1559 cut-off events. [2024-06-21 20:03:26,615 INFO L125 PetriNetUnfolderBase]: For 2613/2613 co-relation queries the response was YES. [2024-06-21 20:03:26,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5137 conditions, 1559 events. 949/1559 cut-off events. For 2613/2613 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7815 event pairs, 364 based on Foata normal form. 2/1558 useless extension candidates. Maximal degree in co-relation 5114. Up to 1424 conditions per place. [2024-06-21 20:03:26,625 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 61 selfloop transitions, 8 changer transitions 0/76 dead transitions. [2024-06-21 20:03:26,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 76 transitions, 563 flow [2024-06-21 20:03:26,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:03:26,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:03:26,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-21 20:03:26,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-21 20:03:26,628 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 347 flow. Second operand 4 states and 99 transitions. [2024-06-21 20:03:26,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 76 transitions, 563 flow [2024-06-21 20:03:26,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 523 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:26,635 INFO L231 Difference]: Finished difference. Result has 58 places, 64 transitions, 393 flow [2024-06-21 20:03:26,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=393, PETRI_PLACES=58, PETRI_TRANSITIONS=64} [2024-06-21 20:03:26,637 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2024-06-21 20:03:26,638 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 64 transitions, 393 flow [2024-06-21 20:03:26,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:26,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:26,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:26,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:03:26,642 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:26,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:26,642 INFO L85 PathProgramCache]: Analyzing trace with hash 187187522, now seen corresponding path program 1 times [2024-06-21 20:03:26,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:26,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369981469] [2024-06-21 20:03:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:26,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:26,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:26,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369981469] [2024-06-21 20:03:26,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369981469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:26,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:26,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:26,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297193913] [2024-06-21 20:03:26,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:26,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:26,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:26,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:26,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:26,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:26,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 64 transitions, 393 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:26,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:26,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:26,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:26,973 INFO L124 PetriNetUnfolderBase]: 942/1529 cut-off events. [2024-06-21 20:03:26,973 INFO L125 PetriNetUnfolderBase]: For 3732/3768 co-relation queries the response was YES. [2024-06-21 20:03:26,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5509 conditions, 1529 events. 942/1529 cut-off events. For 3732/3768 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7829 event pairs, 225 based on Foata normal form. 13/1527 useless extension candidates. Maximal degree in co-relation 5484. Up to 1275 conditions per place. [2024-06-21 20:03:26,982 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 57 selfloop transitions, 36 changer transitions 0/103 dead transitions. [2024-06-21 20:03:26,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 103 transitions, 747 flow [2024-06-21 20:03:26,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:26,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-21 20:03:26,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6791666666666667 [2024-06-21 20:03:26,983 INFO L175 Difference]: Start difference. First operand has 58 places, 64 transitions, 393 flow. Second operand 6 states and 163 transitions. [2024-06-21 20:03:26,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 103 transitions, 747 flow [2024-06-21 20:03:26,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 103 transitions, 743 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 20:03:26,988 INFO L231 Difference]: Finished difference. Result has 64 places, 75 transitions, 546 flow [2024-06-21 20:03:26,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=546, PETRI_PLACES=64, PETRI_TRANSITIONS=75} [2024-06-21 20:03:26,991 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-06-21 20:03:26,991 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 75 transitions, 546 flow [2024-06-21 20:03:26,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:26,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:26,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:26,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:03:26,991 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:26,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:26,992 INFO L85 PathProgramCache]: Analyzing trace with hash 187307678, now seen corresponding path program 1 times [2024-06-21 20:03:26,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:26,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158533091] [2024-06-21 20:03:26,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:26,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:27,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:27,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158533091] [2024-06-21 20:03:27,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158533091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:27,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:27,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:27,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456807028] [2024-06-21 20:03:27,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:27,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:27,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:27,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:27,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:27,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:27,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 75 transitions, 546 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:27,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:27,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:27,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:27,315 INFO L124 PetriNetUnfolderBase]: 1002/1652 cut-off events. [2024-06-21 20:03:27,316 INFO L125 PetriNetUnfolderBase]: For 4884/4884 co-relation queries the response was YES. [2024-06-21 20:03:27,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6288 conditions, 1652 events. 1002/1652 cut-off events. For 4884/4884 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8403 event pairs, 335 based on Foata normal form. 2/1649 useless extension candidates. Maximal degree in co-relation 6260. Up to 1442 conditions per place. [2024-06-21 20:03:27,325 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 87 selfloop transitions, 19 changer transitions 0/113 dead transitions. [2024-06-21 20:03:27,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 113 transitions, 923 flow [2024-06-21 20:03:27,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:27,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:27,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 20:03:27,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-21 20:03:27,326 INFO L175 Difference]: Start difference. First operand has 64 places, 75 transitions, 546 flow. Second operand 6 states and 149 transitions. [2024-06-21 20:03:27,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 113 transitions, 923 flow [2024-06-21 20:03:27,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 883 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:27,332 INFO L231 Difference]: Finished difference. Result has 71 places, 87 transitions, 649 flow [2024-06-21 20:03:27,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=649, PETRI_PLACES=71, PETRI_TRANSITIONS=87} [2024-06-21 20:03:27,333 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-06-21 20:03:27,333 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 87 transitions, 649 flow [2024-06-21 20:03:27,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:27,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:27,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:27,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:03:27,334 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:27,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:27,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1104153096, now seen corresponding path program 2 times [2024-06-21 20:03:27,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:27,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709213763] [2024-06-21 20:03:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:27,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:27,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:27,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709213763] [2024-06-21 20:03:27,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709213763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:27,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:27,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:27,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81017711] [2024-06-21 20:03:27,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:27,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:27,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:27,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:27,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:27,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:27,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 87 transitions, 649 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:27,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:27,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:27,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:27,657 INFO L124 PetriNetUnfolderBase]: 967/1592 cut-off events. [2024-06-21 20:03:27,657 INFO L125 PetriNetUnfolderBase]: For 6650/6754 co-relation queries the response was YES. [2024-06-21 20:03:27,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6626 conditions, 1592 events. 967/1592 cut-off events. For 6650/6754 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8171 event pairs, 268 based on Foata normal form. 17/1563 useless extension candidates. Maximal degree in co-relation 6593. Up to 1352 conditions per place. [2024-06-21 20:03:27,682 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 72 selfloop transitions, 34 changer transitions 0/119 dead transitions. [2024-06-21 20:03:27,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 119 transitions, 1003 flow [2024-06-21 20:03:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:27,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 20:03:27,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 20:03:27,683 INFO L175 Difference]: Start difference. First operand has 71 places, 87 transitions, 649 flow. Second operand 6 states and 156 transitions. [2024-06-21 20:03:27,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 119 transitions, 1003 flow [2024-06-21 20:03:27,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 119 transitions, 975 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:27,691 INFO L231 Difference]: Finished difference. Result has 75 places, 95 transitions, 772 flow [2024-06-21 20:03:27,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=772, PETRI_PLACES=75, PETRI_TRANSITIONS=95} [2024-06-21 20:03:27,691 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-06-21 20:03:27,692 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 95 transitions, 772 flow [2024-06-21 20:03:27,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:27,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:27,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:27,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:03:27,692 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:27,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:27,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1409729370, now seen corresponding path program 3 times [2024-06-21 20:03:27,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:27,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105066693] [2024-06-21 20:03:27,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:27,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:27,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:27,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105066693] [2024-06-21 20:03:27,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105066693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:27,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:27,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:27,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835938521] [2024-06-21 20:03:27,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:27,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:27,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:27,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:27,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:27,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:27,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 95 transitions, 772 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:27,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:27,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:27,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:27,991 INFO L124 PetriNetUnfolderBase]: 962/1586 cut-off events. [2024-06-21 20:03:27,992 INFO L125 PetriNetUnfolderBase]: For 7755/7841 co-relation queries the response was YES. [2024-06-21 20:03:27,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6832 conditions, 1586 events. 962/1586 cut-off events. For 7755/7841 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8135 event pairs, 267 based on Foata normal form. 17/1558 useless extension candidates. Maximal degree in co-relation 6798. Up to 1294 conditions per place. [2024-06-21 20:03:28,004 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 64 selfloop transitions, 46 changer transitions 0/123 dead transitions. [2024-06-21 20:03:28,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 123 transitions, 1111 flow [2024-06-21 20:03:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:28,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:28,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 20:03:28,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-21 20:03:28,006 INFO L175 Difference]: Start difference. First operand has 75 places, 95 transitions, 772 flow. Second operand 6 states and 158 transitions. [2024-06-21 20:03:28,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 123 transitions, 1111 flow [2024-06-21 20:03:28,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 123 transitions, 1023 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:28,016 INFO L231 Difference]: Finished difference. Result has 79 places, 99 transitions, 843 flow [2024-06-21 20:03:28,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=843, PETRI_PLACES=79, PETRI_TRANSITIONS=99} [2024-06-21 20:03:28,017 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-21 20:03:28,017 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 99 transitions, 843 flow [2024-06-21 20:03:28,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:28,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:28,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:28,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:03:28,018 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:28,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:28,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1409492034, now seen corresponding path program 2 times [2024-06-21 20:03:28,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:28,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159651536] [2024-06-21 20:03:28,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:28,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:28,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:28,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:28,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159651536] [2024-06-21 20:03:28,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159651536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:28,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:28,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:28,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696812383] [2024-06-21 20:03:28,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:28,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:28,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:28,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:28,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:28,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:28,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 99 transitions, 843 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:28,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:28,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:28,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:28,311 INFO L124 PetriNetUnfolderBase]: 1047/1732 cut-off events. [2024-06-21 20:03:28,311 INFO L125 PetriNetUnfolderBase]: For 8922/8932 co-relation queries the response was YES. [2024-06-21 20:03:28,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7489 conditions, 1732 events. 1047/1732 cut-off events. For 8922/8932 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8869 event pairs, 344 based on Foata normal form. 10/1736 useless extension candidates. Maximal degree in co-relation 7453. Up to 1503 conditions per place. [2024-06-21 20:03:28,325 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 93 selfloop transitions, 22 changer transitions 0/122 dead transitions. [2024-06-21 20:03:28,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 122 transitions, 1190 flow [2024-06-21 20:03:28,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:28,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:28,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-21 20:03:28,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-21 20:03:28,327 INFO L175 Difference]: Start difference. First operand has 79 places, 99 transitions, 843 flow. Second operand 5 states and 124 transitions. [2024-06-21 20:03:28,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 122 transitions, 1190 flow [2024-06-21 20:03:28,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 1092 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:28,337 INFO L231 Difference]: Finished difference. Result has 81 places, 104 transitions, 845 flow [2024-06-21 20:03:28,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=845, PETRI_PLACES=81, PETRI_TRANSITIONS=104} [2024-06-21 20:03:28,338 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-21 20:03:28,338 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 104 transitions, 845 flow [2024-06-21 20:03:28,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:28,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:28,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:28,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:03:28,339 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:28,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:28,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1409729184, now seen corresponding path program 3 times [2024-06-21 20:03:28,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:28,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508306935] [2024-06-21 20:03:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:28,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:28,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:28,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508306935] [2024-06-21 20:03:28,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508306935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:28,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:28,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:28,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255028090] [2024-06-21 20:03:28,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:28,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:28,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:28,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:28,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:28,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:28,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 104 transitions, 845 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:28,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:28,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:28,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:28,635 INFO L124 PetriNetUnfolderBase]: 1042/1720 cut-off events. [2024-06-21 20:03:28,635 INFO L125 PetriNetUnfolderBase]: For 8144/8144 co-relation queries the response was YES. [2024-06-21 20:03:28,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7376 conditions, 1720 events. 1042/1720 cut-off events. For 8144/8144 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8805 event pairs, 333 based on Foata normal form. 2/1717 useless extension candidates. Maximal degree in co-relation 7338. Up to 1498 conditions per place. [2024-06-21 20:03:28,648 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 93 selfloop transitions, 23 changer transitions 0/123 dead transitions. [2024-06-21 20:03:28,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 123 transitions, 1130 flow [2024-06-21 20:03:28,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:28,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-21 20:03:28,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-21 20:03:28,650 INFO L175 Difference]: Start difference. First operand has 81 places, 104 transitions, 845 flow. Second operand 5 states and 126 transitions. [2024-06-21 20:03:28,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 123 transitions, 1130 flow [2024-06-21 20:03:28,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 1104 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:28,663 INFO L231 Difference]: Finished difference. Result has 85 places, 104 transitions, 877 flow [2024-06-21 20:03:28,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=877, PETRI_PLACES=85, PETRI_TRANSITIONS=104} [2024-06-21 20:03:28,663 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-21 20:03:28,664 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 104 transitions, 877 flow [2024-06-21 20:03:28,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:28,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:28,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:28,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:03:28,664 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:28,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:28,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1409483106, now seen corresponding path program 1 times [2024-06-21 20:03:28,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:28,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607359459] [2024-06-21 20:03:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:28,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:28,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:28,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607359459] [2024-06-21 20:03:28,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607359459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:28,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:28,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:28,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712496442] [2024-06-21 20:03:28,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:28,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:28,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:28,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:28,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:28,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:28,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 104 transitions, 877 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:28,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:28,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:28,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:28,963 INFO L124 PetriNetUnfolderBase]: 1034/1709 cut-off events. [2024-06-21 20:03:28,963 INFO L125 PetriNetUnfolderBase]: For 9403/9406 co-relation queries the response was YES. [2024-06-21 20:03:28,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7456 conditions, 1709 events. 1034/1709 cut-off events. For 9403/9406 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8739 event pairs, 313 based on Foata normal form. 6/1712 useless extension candidates. Maximal degree in co-relation 7416. Up to 1528 conditions per place. [2024-06-21 20:03:28,974 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 106 selfloop transitions, 10 changer transitions 0/123 dead transitions. [2024-06-21 20:03:28,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 123 transitions, 1168 flow [2024-06-21 20:03:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-21 20:03:28,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:03:28,975 INFO L175 Difference]: Start difference. First operand has 85 places, 104 transitions, 877 flow. Second operand 5 states and 120 transitions. [2024-06-21 20:03:28,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 123 transitions, 1168 flow [2024-06-21 20:03:28,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 123 transitions, 1123 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:28,988 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 875 flow [2024-06-21 20:03:28,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=875, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2024-06-21 20:03:28,989 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-06-21 20:03:28,989 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 875 flow [2024-06-21 20:03:28,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:28,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:28,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:28,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:03:28,990 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:28,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:28,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1507847178, now seen corresponding path program 1 times [2024-06-21 20:03:28,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:28,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525591034] [2024-06-21 20:03:28,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:28,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:29,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:29,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525591034] [2024-06-21 20:03:29,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525591034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:29,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:29,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:29,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22825126] [2024-06-21 20:03:29,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:29,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:29,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:29,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:29,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:29,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:29,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 875 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:29,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:29,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:29,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:29,272 INFO L124 PetriNetUnfolderBase]: 1045/1723 cut-off events. [2024-06-21 20:03:29,272 INFO L125 PetriNetUnfolderBase]: For 9506/9506 co-relation queries the response was YES. [2024-06-21 20:03:29,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7575 conditions, 1723 events. 1045/1723 cut-off events. For 9506/9506 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8680 event pairs, 308 based on Foata normal form. 2/1720 useless extension candidates. Maximal degree in co-relation 7535. Up to 1420 conditions per place. [2024-06-21 20:03:29,283 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 112 selfloop transitions, 34 changer transitions 0/153 dead transitions. [2024-06-21 20:03:29,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 153 transitions, 1393 flow [2024-06-21 20:03:29,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:29,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:03:29,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:03:29,285 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 875 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:03:29,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 153 transitions, 1393 flow [2024-06-21 20:03:29,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 153 transitions, 1368 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:29,304 INFO L231 Difference]: Finished difference. Result has 92 places, 119 transitions, 1048 flow [2024-06-21 20:03:29,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1048, PETRI_PLACES=92, PETRI_TRANSITIONS=119} [2024-06-21 20:03:29,305 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-21 20:03:29,305 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 119 transitions, 1048 flow [2024-06-21 20:03:29,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:29,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:29,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:29,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:03:29,306 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:29,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:29,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1511566248, now seen corresponding path program 2 times [2024-06-21 20:03:29,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:29,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057468089] [2024-06-21 20:03:29,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:29,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:29,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:29,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057468089] [2024-06-21 20:03:29,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057468089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:29,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:29,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:29,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737143545] [2024-06-21 20:03:29,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:29,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:29,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:29,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:29,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:29,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:29,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 119 transitions, 1048 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:29,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:29,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:29,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:29,684 INFO L124 PetriNetUnfolderBase]: 1072/1772 cut-off events. [2024-06-21 20:03:29,684 INFO L125 PetriNetUnfolderBase]: For 11562/11562 co-relation queries the response was YES. [2024-06-21 20:03:29,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8291 conditions, 1772 events. 1072/1772 cut-off events. For 11562/11562 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9035 event pairs, 308 based on Foata normal form. 2/1769 useless extension candidates. Maximal degree in co-relation 8248. Up to 1512 conditions per place. [2024-06-21 20:03:29,696 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 118 selfloop transitions, 30 changer transitions 0/155 dead transitions. [2024-06-21 20:03:29,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 155 transitions, 1526 flow [2024-06-21 20:03:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 20:03:29,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-21 20:03:29,698 INFO L175 Difference]: Start difference. First operand has 92 places, 119 transitions, 1048 flow. Second operand 7 states and 172 transitions. [2024-06-21 20:03:29,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 155 transitions, 1526 flow [2024-06-21 20:03:29,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 155 transitions, 1474 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:29,714 INFO L231 Difference]: Finished difference. Result has 98 places, 126 transitions, 1140 flow [2024-06-21 20:03:29,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1140, PETRI_PLACES=98, PETRI_TRANSITIONS=126} [2024-06-21 20:03:29,716 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-21 20:03:29,716 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 126 transitions, 1140 flow [2024-06-21 20:03:29,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:29,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:29,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:29,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:03:29,716 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:29,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:29,717 INFO L85 PathProgramCache]: Analyzing trace with hash -130985520, now seen corresponding path program 3 times [2024-06-21 20:03:29,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:29,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150275918] [2024-06-21 20:03:29,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:29,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:29,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:29,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150275918] [2024-06-21 20:03:29,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150275918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:29,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:29,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:29,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845998405] [2024-06-21 20:03:29,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:29,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:29,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:29,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:29,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:29,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:29,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 126 transitions, 1140 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:29,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:29,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:29,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:30,098 INFO L124 PetriNetUnfolderBase]: 1067/1765 cut-off events. [2024-06-21 20:03:30,098 INFO L125 PetriNetUnfolderBase]: For 12838/12838 co-relation queries the response was YES. [2024-06-21 20:03:30,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8473 conditions, 1765 events. 1067/1765 cut-off events. For 12838/12838 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8972 event pairs, 308 based on Foata normal form. 2/1762 useless extension candidates. Maximal degree in co-relation 8427. Up to 1507 conditions per place. [2024-06-21 20:03:30,108 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 123 selfloop transitions, 32 changer transitions 0/162 dead transitions. [2024-06-21 20:03:30,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 162 transitions, 1553 flow [2024-06-21 20:03:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:03:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:03:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-21 20:03:30,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 20:03:30,110 INFO L175 Difference]: Start difference. First operand has 98 places, 126 transitions, 1140 flow. Second operand 9 states and 210 transitions. [2024-06-21 20:03:30,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 162 transitions, 1553 flow [2024-06-21 20:03:30,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 162 transitions, 1511 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:30,125 INFO L231 Difference]: Finished difference. Result has 104 places, 127 transitions, 1180 flow [2024-06-21 20:03:30,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1180, PETRI_PLACES=104, PETRI_TRANSITIONS=127} [2024-06-21 20:03:30,126 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-21 20:03:30,126 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 127 transitions, 1180 flow [2024-06-21 20:03:30,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:30,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:30,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:30,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:03:30,127 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:30,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:30,127 INFO L85 PathProgramCache]: Analyzing trace with hash -197823618, now seen corresponding path program 4 times [2024-06-21 20:03:30,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:30,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689250738] [2024-06-21 20:03:30,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:30,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:30,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:30,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689250738] [2024-06-21 20:03:30,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689250738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:30,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:30,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:30,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11353714] [2024-06-21 20:03:30,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:30,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:30,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:30,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:30,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:30,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:30,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 127 transitions, 1180 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:30,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:30,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:30,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:30,435 INFO L124 PetriNetUnfolderBase]: 1078/1786 cut-off events. [2024-06-21 20:03:30,435 INFO L125 PetriNetUnfolderBase]: For 14353/14353 co-relation queries the response was YES. [2024-06-21 20:03:30,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8779 conditions, 1786 events. 1078/1786 cut-off events. For 14353/14353 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9131 event pairs, 308 based on Foata normal form. 2/1783 useless extension candidates. Maximal degree in co-relation 8731. Up to 1474 conditions per place. [2024-06-21 20:03:30,448 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 112 selfloop transitions, 40 changer transitions 0/159 dead transitions. [2024-06-21 20:03:30,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 159 transitions, 1647 flow [2024-06-21 20:03:30,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:30,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:30,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 20:03:30,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-21 20:03:30,450 INFO L175 Difference]: Start difference. First operand has 104 places, 127 transitions, 1180 flow. Second operand 6 states and 154 transitions. [2024-06-21 20:03:30,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 159 transitions, 1647 flow [2024-06-21 20:03:30,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 159 transitions, 1581 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 20:03:30,474 INFO L231 Difference]: Finished difference. Result has 104 places, 131 transitions, 1263 flow [2024-06-21 20:03:30,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1263, PETRI_PLACES=104, PETRI_TRANSITIONS=131} [2024-06-21 20:03:30,475 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-21 20:03:30,475 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 131 transitions, 1263 flow [2024-06-21 20:03:30,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:30,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:30,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:30,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:03:30,476 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:30,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:30,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1035551628, now seen corresponding path program 5 times [2024-06-21 20:03:30,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:30,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413333666] [2024-06-21 20:03:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:30,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:30,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:30,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413333666] [2024-06-21 20:03:30,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413333666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:30,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:30,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:30,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575825773] [2024-06-21 20:03:30,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:30,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:30,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:30,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:30,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:30,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:30,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 131 transitions, 1263 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:30,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:30,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:30,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:30,792 INFO L124 PetriNetUnfolderBase]: 1089/1807 cut-off events. [2024-06-21 20:03:30,792 INFO L125 PetriNetUnfolderBase]: For 16354/16354 co-relation queries the response was YES. [2024-06-21 20:03:30,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9154 conditions, 1807 events. 1089/1807 cut-off events. For 16354/16354 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9285 event pairs, 308 based on Foata normal form. 2/1804 useless extension candidates. Maximal degree in co-relation 9104. Up to 1486 conditions per place. [2024-06-21 20:03:30,805 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 118 selfloop transitions, 45 changer transitions 0/170 dead transitions. [2024-06-21 20:03:30,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 170 transitions, 1778 flow [2024-06-21 20:03:30,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:30,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 20:03:30,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:03:30,807 INFO L175 Difference]: Start difference. First operand has 104 places, 131 transitions, 1263 flow. Second operand 8 states and 196 transitions. [2024-06-21 20:03:30,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 170 transitions, 1778 flow [2024-06-21 20:03:30,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 170 transitions, 1676 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:30,829 INFO L231 Difference]: Finished difference. Result has 107 places, 134 transitions, 1305 flow [2024-06-21 20:03:30,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1305, PETRI_PLACES=107, PETRI_TRANSITIONS=134} [2024-06-21 20:03:30,829 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-21 20:03:30,829 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 134 transitions, 1305 flow [2024-06-21 20:03:30,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:30,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:30,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:30,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:03:30,830 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:30,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:30,831 INFO L85 PathProgramCache]: Analyzing trace with hash -751728828, now seen corresponding path program 6 times [2024-06-21 20:03:30,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:30,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612826559] [2024-06-21 20:03:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:30,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:30,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:30,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612826559] [2024-06-21 20:03:30,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612826559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:30,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:30,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:30,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440587949] [2024-06-21 20:03:30,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:30,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:30,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:30,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:30,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:30,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:30,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 134 transitions, 1305 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:30,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:30,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:30,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:31,160 INFO L124 PetriNetUnfolderBase]: 1084/1805 cut-off events. [2024-06-21 20:03:31,160 INFO L125 PetriNetUnfolderBase]: For 16723/16735 co-relation queries the response was YES. [2024-06-21 20:03:31,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9100 conditions, 1805 events. 1084/1805 cut-off events. For 16723/16735 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9341 event pairs, 319 based on Foata normal form. 12/1811 useless extension candidates. Maximal degree in co-relation 9050. Up to 1481 conditions per place. [2024-06-21 20:03:31,173 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 114 selfloop transitions, 45 changer transitions 0/166 dead transitions. [2024-06-21 20:03:31,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 166 transitions, 1718 flow [2024-06-21 20:03:31,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 20:03:31,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-21 20:03:31,175 INFO L175 Difference]: Start difference. First operand has 107 places, 134 transitions, 1305 flow. Second operand 8 states and 189 transitions. [2024-06-21 20:03:31,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 166 transitions, 1718 flow [2024-06-21 20:03:31,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 166 transitions, 1604 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 20:03:31,196 INFO L231 Difference]: Finished difference. Result has 108 places, 135 transitions, 1301 flow [2024-06-21 20:03:31,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1301, PETRI_PLACES=108, PETRI_TRANSITIONS=135} [2024-06-21 20:03:31,197 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-21 20:03:31,197 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 135 transitions, 1301 flow [2024-06-21 20:03:31,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:31,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:31,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:31,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:03:31,198 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:31,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:31,198 INFO L85 PathProgramCache]: Analyzing trace with hash -2003529296, now seen corresponding path program 1 times [2024-06-21 20:03:31,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:31,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765297801] [2024-06-21 20:03:31,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:31,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:31,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:31,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765297801] [2024-06-21 20:03:31,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765297801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:31,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:31,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:31,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754391796] [2024-06-21 20:03:31,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:31,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:31,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:31,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:31,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:31,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:31,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 135 transitions, 1301 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:31,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:31,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:31,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:31,479 INFO L124 PetriNetUnfolderBase]: 994/1646 cut-off events. [2024-06-21 20:03:31,480 INFO L125 PetriNetUnfolderBase]: For 16572/16590 co-relation queries the response was YES. [2024-06-21 20:03:31,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8420 conditions, 1646 events. 994/1646 cut-off events. For 16572/16590 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8453 event pairs, 302 based on Foata normal form. 19/1644 useless extension candidates. Maximal degree in co-relation 8370. Up to 1400 conditions per place. [2024-06-21 20:03:31,492 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 102 selfloop transitions, 26 changer transitions 0/143 dead transitions. [2024-06-21 20:03:31,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 143 transitions, 1577 flow [2024-06-21 20:03:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:03:31,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:03:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-21 20:03:31,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-21 20:03:31,494 INFO L175 Difference]: Start difference. First operand has 108 places, 135 transitions, 1301 flow. Second operand 4 states and 101 transitions. [2024-06-21 20:03:31,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 143 transitions, 1577 flow [2024-06-21 20:03:31,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 143 transitions, 1477 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:31,513 INFO L231 Difference]: Finished difference. Result has 106 places, 135 transitions, 1265 flow [2024-06-21 20:03:31,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1265, PETRI_PLACES=106, PETRI_TRANSITIONS=135} [2024-06-21 20:03:31,513 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-21 20:03:31,514 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 135 transitions, 1265 flow [2024-06-21 20:03:31,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:31,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:31,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:31,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:03:31,514 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:31,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:31,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1546136027, now seen corresponding path program 1 times [2024-06-21 20:03:31,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:31,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57205306] [2024-06-21 20:03:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:31,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:31,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:31,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57205306] [2024-06-21 20:03:31,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57205306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:31,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:31,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:31,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658606210] [2024-06-21 20:03:31,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:31,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:31,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:31,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:31,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:31,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:31,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 135 transitions, 1265 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:31,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:31,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:31,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:31,905 INFO L124 PetriNetUnfolderBase]: 1102/1810 cut-off events. [2024-06-21 20:03:31,905 INFO L125 PetriNetUnfolderBase]: For 20905/20921 co-relation queries the response was YES. [2024-06-21 20:03:31,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9267 conditions, 1810 events. 1102/1810 cut-off events. For 20905/20921 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9331 event pairs, 191 based on Foata normal form. 18/1777 useless extension candidates. Maximal degree in co-relation 9216. Up to 1226 conditions per place. [2024-06-21 20:03:31,921 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 90 selfloop transitions, 64 changer transitions 0/179 dead transitions. [2024-06-21 20:03:31,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 179 transitions, 1821 flow [2024-06-21 20:03:31,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:31,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:31,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-21 20:03:31,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6821428571428572 [2024-06-21 20:03:31,923 INFO L175 Difference]: Start difference. First operand has 106 places, 135 transitions, 1265 flow. Second operand 7 states and 191 transitions. [2024-06-21 20:03:31,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 179 transitions, 1821 flow [2024-06-21 20:03:31,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 179 transitions, 1757 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:31,948 INFO L231 Difference]: Finished difference. Result has 110 places, 139 transitions, 1380 flow [2024-06-21 20:03:31,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1380, PETRI_PLACES=110, PETRI_TRANSITIONS=139} [2024-06-21 20:03:31,948 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-21 20:03:31,949 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 139 transitions, 1380 flow [2024-06-21 20:03:31,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:31,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:31,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:31,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:03:31,949 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:31,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:31,950 INFO L85 PathProgramCache]: Analyzing trace with hash 118948389, now seen corresponding path program 2 times [2024-06-21 20:03:31,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:31,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478851570] [2024-06-21 20:03:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:31,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:32,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:32,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478851570] [2024-06-21 20:03:32,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478851570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:32,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:32,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:32,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102442957] [2024-06-21 20:03:32,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:32,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:32,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:32,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:32,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:32,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:32,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 139 transitions, 1380 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:32,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:32,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:32,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:32,321 INFO L124 PetriNetUnfolderBase]: 1147/1881 cut-off events. [2024-06-21 20:03:32,321 INFO L125 PetriNetUnfolderBase]: For 24439/24462 co-relation queries the response was YES. [2024-06-21 20:03:32,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10037 conditions, 1881 events. 1147/1881 cut-off events. For 24439/24462 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9800 event pairs, 283 based on Foata normal form. 16/1842 useless extension candidates. Maximal degree in co-relation 9986. Up to 1477 conditions per place. [2024-06-21 20:03:32,339 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 88 selfloop transitions, 62 changer transitions 0/175 dead transitions. [2024-06-21 20:03:32,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 175 transitions, 1832 flow [2024-06-21 20:03:32,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:32,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 20:03:32,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6642857142857143 [2024-06-21 20:03:32,341 INFO L175 Difference]: Start difference. First operand has 110 places, 139 transitions, 1380 flow. Second operand 7 states and 186 transitions. [2024-06-21 20:03:32,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 175 transitions, 1832 flow [2024-06-21 20:03:32,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 175 transitions, 1745 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:32,366 INFO L231 Difference]: Finished difference. Result has 114 places, 141 transitions, 1454 flow [2024-06-21 20:03:32,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1454, PETRI_PLACES=114, PETRI_TRANSITIONS=141} [2024-06-21 20:03:32,367 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-21 20:03:32,367 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 141 transitions, 1454 flow [2024-06-21 20:03:32,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:32,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:32,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:32,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:03:32,368 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:32,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:32,369 INFO L85 PathProgramCache]: Analyzing trace with hash -386090205, now seen corresponding path program 3 times [2024-06-21 20:03:32,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:32,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083939525] [2024-06-21 20:03:32,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:32,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:32,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:32,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083939525] [2024-06-21 20:03:32,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083939525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:32,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:32,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:32,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117693863] [2024-06-21 20:03:32,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:32,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:32,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:32,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:32,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:32,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:32,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 141 transitions, 1454 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:32,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:32,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:32,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:32,809 INFO L124 PetriNetUnfolderBase]: 1199/1965 cut-off events. [2024-06-21 20:03:32,809 INFO L125 PetriNetUnfolderBase]: For 27508/27531 co-relation queries the response was YES. [2024-06-21 20:03:32,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10760 conditions, 1965 events. 1199/1965 cut-off events. For 27508/27531 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10309 event pairs, 284 based on Foata normal form. 16/1929 useless extension candidates. Maximal degree in co-relation 10707. Up to 1626 conditions per place. [2024-06-21 20:03:32,826 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 109 selfloop transitions, 39 changer transitions 0/173 dead transitions. [2024-06-21 20:03:32,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 173 transitions, 1864 flow [2024-06-21 20:03:32,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:03:32,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-21 20:03:32,827 INFO L175 Difference]: Start difference. First operand has 114 places, 141 transitions, 1454 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:03:32,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 173 transitions, 1864 flow [2024-06-21 20:03:32,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 173 transitions, 1735 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:32,854 INFO L231 Difference]: Finished difference. Result has 116 places, 143 transitions, 1444 flow [2024-06-21 20:03:32,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1444, PETRI_PLACES=116, PETRI_TRANSITIONS=143} [2024-06-21 20:03:32,855 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-21 20:03:32,855 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 143 transitions, 1444 flow [2024-06-21 20:03:32,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:32,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:32,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:32,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:03:32,855 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:32,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:32,856 INFO L85 PathProgramCache]: Analyzing trace with hash -385905507, now seen corresponding path program 1 times [2024-06-21 20:03:32,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:32,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309680890] [2024-06-21 20:03:32,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:32,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:32,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:32,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309680890] [2024-06-21 20:03:32,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309680890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:32,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:32,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:32,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526503594] [2024-06-21 20:03:32,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:32,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:32,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:32,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:32,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:32,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:32,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 143 transitions, 1444 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:32,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:32,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:32,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:33,209 INFO L124 PetriNetUnfolderBase]: 1270/2071 cut-off events. [2024-06-21 20:03:33,210 INFO L125 PetriNetUnfolderBase]: For 25890/25890 co-relation queries the response was YES. [2024-06-21 20:03:33,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11120 conditions, 2071 events. 1270/2071 cut-off events. For 25890/25890 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10810 event pairs, 310 based on Foata normal form. 4/2070 useless extension candidates. Maximal degree in co-relation 11066. Up to 1832 conditions per place. [2024-06-21 20:03:33,226 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 141 selfloop transitions, 25 changer transitions 0/173 dead transitions. [2024-06-21 20:03:33,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 173 transitions, 1865 flow [2024-06-21 20:03:33,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:33,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:03:33,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:03:33,228 INFO L175 Difference]: Start difference. First operand has 116 places, 143 transitions, 1444 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:03:33,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 173 transitions, 1865 flow [2024-06-21 20:03:33,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 173 transitions, 1778 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:33,257 INFO L231 Difference]: Finished difference. Result has 118 places, 145 transitions, 1432 flow [2024-06-21 20:03:33,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1432, PETRI_PLACES=118, PETRI_TRANSITIONS=145} [2024-06-21 20:03:33,258 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-21 20:03:33,259 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 145 transitions, 1432 flow [2024-06-21 20:03:33,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:33,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:33,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:33,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:03:33,259 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:33,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1835189915, now seen corresponding path program 4 times [2024-06-21 20:03:33,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:33,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620084791] [2024-06-21 20:03:33,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:33,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:33,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:33,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620084791] [2024-06-21 20:03:33,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620084791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:33,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:33,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:33,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443971335] [2024-06-21 20:03:33,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:33,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:33,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:33,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:33,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:33,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:33,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 145 transitions, 1432 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:33,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:33,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:33,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:33,683 INFO L124 PetriNetUnfolderBase]: 1183/1947 cut-off events. [2024-06-21 20:03:33,683 INFO L125 PetriNetUnfolderBase]: For 29301/29328 co-relation queries the response was YES. [2024-06-21 20:03:33,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10580 conditions, 1947 events. 1183/1947 cut-off events. For 29301/29328 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10200 event pairs, 184 based on Foata normal form. 24/1921 useless extension candidates. Maximal degree in co-relation 10525. Up to 1438 conditions per place. [2024-06-21 20:03:33,700 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 91 selfloop transitions, 59 changer transitions 0/176 dead transitions. [2024-06-21 20:03:33,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 176 transitions, 1858 flow [2024-06-21 20:03:33,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:33,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:33,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 20:03:33,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6535714285714286 [2024-06-21 20:03:33,701 INFO L175 Difference]: Start difference. First operand has 118 places, 145 transitions, 1432 flow. Second operand 7 states and 183 transitions. [2024-06-21 20:03:33,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 176 transitions, 1858 flow [2024-06-21 20:03:33,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 176 transitions, 1793 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:33,730 INFO L231 Difference]: Finished difference. Result has 120 places, 145 transitions, 1504 flow [2024-06-21 20:03:33,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1504, PETRI_PLACES=120, PETRI_TRANSITIONS=145} [2024-06-21 20:03:33,731 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-21 20:03:33,731 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 145 transitions, 1504 flow [2024-06-21 20:03:33,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:33,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:33,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:33,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:03:33,732 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:33,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:33,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1607104067, now seen corresponding path program 2 times [2024-06-21 20:03:33,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:33,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923011700] [2024-06-21 20:03:33,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:33,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:33,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:33,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923011700] [2024-06-21 20:03:33,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923011700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:33,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:33,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:33,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647312490] [2024-06-21 20:03:33,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:33,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:33,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:33,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:33,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:33,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:33,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 145 transitions, 1504 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:33,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:33,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:33,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:34,061 INFO L124 PetriNetUnfolderBase]: 1256/2058 cut-off events. [2024-06-21 20:03:34,062 INFO L125 PetriNetUnfolderBase]: For 28442/28454 co-relation queries the response was YES. [2024-06-21 20:03:34,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11201 conditions, 2058 events. 1256/2058 cut-off events. For 28442/28454 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10830 event pairs, 317 based on Foata normal form. 14/2066 useless extension candidates. Maximal degree in co-relation 11145. Up to 1814 conditions per place. [2024-06-21 20:03:34,081 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 137 selfloop transitions, 24 changer transitions 0/168 dead transitions. [2024-06-21 20:03:34,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 168 transitions, 1901 flow [2024-06-21 20:03:34,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:34,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:34,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 20:03:34,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-21 20:03:34,082 INFO L175 Difference]: Start difference. First operand has 120 places, 145 transitions, 1504 flow. Second operand 6 states and 143 transitions. [2024-06-21 20:03:34,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 168 transitions, 1901 flow [2024-06-21 20:03:34,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 168 transitions, 1770 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:34,116 INFO L231 Difference]: Finished difference. Result has 120 places, 147 transitions, 1450 flow [2024-06-21 20:03:34,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1450, PETRI_PLACES=120, PETRI_TRANSITIONS=147} [2024-06-21 20:03:34,116 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-21 20:03:34,117 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 147 transitions, 1450 flow [2024-06-21 20:03:34,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:34,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:34,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:34,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:03:34,119 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:34,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:34,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1828510097, now seen corresponding path program 3 times [2024-06-21 20:03:34,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:34,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21475927] [2024-06-21 20:03:34,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:34,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:34,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:34,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21475927] [2024-06-21 20:03:34,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21475927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:34,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:34,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:34,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316525174] [2024-06-21 20:03:34,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:34,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:34,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:34,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:34,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:34,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:34,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 147 transitions, 1450 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:34,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:34,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:34,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:34,505 INFO L124 PetriNetUnfolderBase]: 1273/2085 cut-off events. [2024-06-21 20:03:34,505 INFO L125 PetriNetUnfolderBase]: For 27791/27803 co-relation queries the response was YES. [2024-06-21 20:03:34,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11213 conditions, 2085 events. 1273/2085 cut-off events. For 27791/27803 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10996 event pairs, 288 based on Foata normal form. 14/2093 useless extension candidates. Maximal degree in co-relation 11156. Up to 1758 conditions per place. [2024-06-21 20:03:34,517 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 137 selfloop transitions, 31 changer transitions 0/175 dead transitions. [2024-06-21 20:03:34,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 175 transitions, 1971 flow [2024-06-21 20:03:34,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 20:03:34,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-21 20:03:34,519 INFO L175 Difference]: Start difference. First operand has 120 places, 147 transitions, 1450 flow. Second operand 6 states and 146 transitions. [2024-06-21 20:03:34,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 175 transitions, 1971 flow [2024-06-21 20:03:34,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 175 transitions, 1912 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:34,546 INFO L231 Difference]: Finished difference. Result has 122 places, 151 transitions, 1508 flow [2024-06-21 20:03:34,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1391, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1508, PETRI_PLACES=122, PETRI_TRANSITIONS=151} [2024-06-21 20:03:34,547 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-21 20:03:34,547 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 151 transitions, 1508 flow [2024-06-21 20:03:34,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:34,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:34,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:34,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:03:34,547 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:34,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:34,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1837383801, now seen corresponding path program 4 times [2024-06-21 20:03:34,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:34,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835288899] [2024-06-21 20:03:34,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:34,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:34,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:34,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835288899] [2024-06-21 20:03:34,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835288899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:34,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:34,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:34,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301035126] [2024-06-21 20:03:34,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:34,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:34,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:34,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:34,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:34,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:34,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 151 transitions, 1508 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:34,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:34,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:34,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:34,899 INFO L124 PetriNetUnfolderBase]: 1265/2068 cut-off events. [2024-06-21 20:03:34,899 INFO L125 PetriNetUnfolderBase]: For 29054/29054 co-relation queries the response was YES. [2024-06-21 20:03:34,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11300 conditions, 2068 events. 1265/2068 cut-off events. For 29054/29054 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10819 event pairs, 302 based on Foata normal form. 4/2067 useless extension candidates. Maximal degree in co-relation 11242. Up to 1811 conditions per place. [2024-06-21 20:03:34,915 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 141 selfloop transitions, 27 changer transitions 0/175 dead transitions. [2024-06-21 20:03:34,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 175 transitions, 1909 flow [2024-06-21 20:03:34,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:34,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 20:03:34,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:03:34,916 INFO L175 Difference]: Start difference. First operand has 122 places, 151 transitions, 1508 flow. Second operand 6 states and 147 transitions. [2024-06-21 20:03:34,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 175 transitions, 1909 flow [2024-06-21 20:03:34,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 175 transitions, 1859 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:34,947 INFO L231 Difference]: Finished difference. Result has 126 places, 151 transitions, 1522 flow [2024-06-21 20:03:34,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1458, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1522, PETRI_PLACES=126, PETRI_TRANSITIONS=151} [2024-06-21 20:03:34,948 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-21 20:03:34,948 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 151 transitions, 1522 flow [2024-06-21 20:03:34,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:34,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:34,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:34,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:03:34,949 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:34,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:34,949 INFO L85 PathProgramCache]: Analyzing trace with hash -696131705, now seen corresponding path program 1 times [2024-06-21 20:03:34,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:34,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947788107] [2024-06-21 20:03:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:34,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:35,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:35,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947788107] [2024-06-21 20:03:35,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947788107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:35,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:35,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:35,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026423407] [2024-06-21 20:03:35,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:35,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:35,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:35,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:35,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:35,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:35,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 151 transitions, 1522 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:35,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:35,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:35,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:35,382 INFO L124 PetriNetUnfolderBase]: 1367/2262 cut-off events. [2024-06-21 20:03:35,382 INFO L125 PetriNetUnfolderBase]: For 36487/36487 co-relation queries the response was YES. [2024-06-21 20:03:35,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12359 conditions, 2262 events. 1367/2262 cut-off events. For 36487/36487 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12258 event pairs, 240 based on Foata normal form. 12/2269 useless extension candidates. Maximal degree in co-relation 12299. Up to 1541 conditions per place. [2024-06-21 20:03:35,397 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 145 selfloop transitions, 51 changer transitions 0/203 dead transitions. [2024-06-21 20:03:35,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 203 transitions, 2221 flow [2024-06-21 20:03:35,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 20:03:35,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-21 20:03:35,398 INFO L175 Difference]: Start difference. First operand has 126 places, 151 transitions, 1522 flow. Second operand 8 states and 201 transitions. [2024-06-21 20:03:35,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 203 transitions, 2221 flow [2024-06-21 20:03:35,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 203 transitions, 2155 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:35,433 INFO L231 Difference]: Finished difference. Result has 131 places, 156 transitions, 1652 flow [2024-06-21 20:03:35,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1652, PETRI_PLACES=131, PETRI_TRANSITIONS=156} [2024-06-21 20:03:35,434 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-21 20:03:35,434 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 156 transitions, 1652 flow [2024-06-21 20:03:35,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:35,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:35,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:35,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:03:35,435 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:35,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:35,435 INFO L85 PathProgramCache]: Analyzing trace with hash -607565945, now seen corresponding path program 2 times [2024-06-21 20:03:35,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:35,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033279386] [2024-06-21 20:03:35,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:35,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:35,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:35,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033279386] [2024-06-21 20:03:35,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033279386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:35,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:35,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:35,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402510909] [2024-06-21 20:03:35,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:35,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:35,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:35,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:35,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:35,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:35,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 156 transitions, 1652 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:35,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:35,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:35,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:35,877 INFO L124 PetriNetUnfolderBase]: 1494/2475 cut-off events. [2024-06-21 20:03:35,877 INFO L125 PetriNetUnfolderBase]: For 44908/44908 co-relation queries the response was YES. [2024-06-21 20:03:35,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13940 conditions, 2475 events. 1494/2475 cut-off events. For 44908/44908 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13768 event pairs, 349 based on Foata normal form. 12/2482 useless extension candidates. Maximal degree in co-relation 13877. Up to 1923 conditions per place. [2024-06-21 20:03:35,896 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 145 selfloop transitions, 50 changer transitions 0/202 dead transitions. [2024-06-21 20:03:35,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 202 transitions, 2302 flow [2024-06-21 20:03:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 20:03:35,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-21 20:03:35,900 INFO L175 Difference]: Start difference. First operand has 131 places, 156 transitions, 1652 flow. Second operand 8 states and 201 transitions. [2024-06-21 20:03:35,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 202 transitions, 2302 flow [2024-06-21 20:03:35,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 202 transitions, 2217 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:35,944 INFO L231 Difference]: Finished difference. Result has 137 places, 159 transitions, 1725 flow [2024-06-21 20:03:35,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1571, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1725, PETRI_PLACES=137, PETRI_TRANSITIONS=159} [2024-06-21 20:03:35,945 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-21 20:03:35,945 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 159 transitions, 1725 flow [2024-06-21 20:03:35,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:35,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:35,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:35,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:03:35,946 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:35,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:35,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1637195721, now seen corresponding path program 3 times [2024-06-21 20:03:35,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:35,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267133116] [2024-06-21 20:03:35,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:35,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:36,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:36,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267133116] [2024-06-21 20:03:36,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267133116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:36,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:36,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:36,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023673151] [2024-06-21 20:03:36,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:36,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:36,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:36,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:36,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:36,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:36,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 159 transitions, 1725 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:36,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:36,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:36,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:36,438 INFO L124 PetriNetUnfolderBase]: 1466/2431 cut-off events. [2024-06-21 20:03:36,438 INFO L125 PetriNetUnfolderBase]: For 44886/44886 co-relation queries the response was YES. [2024-06-21 20:03:36,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13648 conditions, 2431 events. 1466/2431 cut-off events. For 44886/44886 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13447 event pairs, 350 based on Foata normal form. 16/2442 useless extension candidates. Maximal degree in co-relation 13582. Up to 2002 conditions per place. [2024-06-21 20:03:36,460 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 142 selfloop transitions, 49 changer transitions 0/198 dead transitions. [2024-06-21 20:03:36,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 198 transitions, 2236 flow [2024-06-21 20:03:36,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:36,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:36,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 20:03:36,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:03:36,461 INFO L175 Difference]: Start difference. First operand has 137 places, 159 transitions, 1725 flow. Second operand 8 states and 196 transitions. [2024-06-21 20:03:36,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 198 transitions, 2236 flow [2024-06-21 20:03:36,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 198 transitions, 2159 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:36,514 INFO L231 Difference]: Finished difference. Result has 141 places, 160 transitions, 1773 flow [2024-06-21 20:03:36,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1773, PETRI_PLACES=141, PETRI_TRANSITIONS=160} [2024-06-21 20:03:36,515 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-21 20:03:36,515 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 160 transitions, 1773 flow [2024-06-21 20:03:36,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:36,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:36,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:36,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:03:36,516 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:36,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:36,516 INFO L85 PathProgramCache]: Analyzing trace with hash 921617075, now seen corresponding path program 4 times [2024-06-21 20:03:36,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:36,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022498773] [2024-06-21 20:03:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:36,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:36,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:36,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022498773] [2024-06-21 20:03:36,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022498773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:36,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:36,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:36,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031636053] [2024-06-21 20:03:36,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:36,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:36,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:36,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:36,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:36,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:36,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 160 transitions, 1773 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:36,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:36,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:36,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:37,010 INFO L124 PetriNetUnfolderBase]: 1524/2529 cut-off events. [2024-06-21 20:03:37,011 INFO L125 PetriNetUnfolderBase]: For 48019/48019 co-relation queries the response was YES. [2024-06-21 20:03:37,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14241 conditions, 2529 events. 1524/2529 cut-off events. For 48019/48019 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14174 event pairs, 362 based on Foata normal form. 16/2540 useless extension candidates. Maximal degree in co-relation 14173. Up to 2169 conditions per place. [2024-06-21 20:03:37,029 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 164 selfloop transitions, 33 changer transitions 0/204 dead transitions. [2024-06-21 20:03:37,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 204 transitions, 2307 flow [2024-06-21 20:03:37,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:03:37,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:03:37,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-21 20:03:37,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5825 [2024-06-21 20:03:37,031 INFO L175 Difference]: Start difference. First operand has 141 places, 160 transitions, 1773 flow. Second operand 10 states and 233 transitions. [2024-06-21 20:03:37,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 204 transitions, 2307 flow [2024-06-21 20:03:37,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 204 transitions, 2212 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:37,083 INFO L231 Difference]: Finished difference. Result has 145 places, 161 transitions, 1770 flow [2024-06-21 20:03:37,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1678, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1770, PETRI_PLACES=145, PETRI_TRANSITIONS=161} [2024-06-21 20:03:37,084 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-21 20:03:37,084 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 161 transitions, 1770 flow [2024-06-21 20:03:37,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:37,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:37,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:37,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:03:37,084 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:37,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:37,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1328359101, now seen corresponding path program 5 times [2024-06-21 20:03:37,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:37,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018122897] [2024-06-21 20:03:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:37,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:37,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:37,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018122897] [2024-06-21 20:03:37,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018122897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:37,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:37,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:37,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228164233] [2024-06-21 20:03:37,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:37,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:37,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:37,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:37,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:37,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:37,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 161 transitions, 1770 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:37,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:37,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:37,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:37,528 INFO L124 PetriNetUnfolderBase]: 1582/2637 cut-off events. [2024-06-21 20:03:37,529 INFO L125 PetriNetUnfolderBase]: For 51756/51756 co-relation queries the response was YES. [2024-06-21 20:03:37,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14778 conditions, 2637 events. 1582/2637 cut-off events. For 51756/51756 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 15060 event pairs, 377 based on Foata normal form. 16/2648 useless extension candidates. Maximal degree in co-relation 14709. Up to 2267 conditions per place. [2024-06-21 20:03:37,549 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 158 selfloop transitions, 32 changer transitions 0/197 dead transitions. [2024-06-21 20:03:37,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 197 transitions, 2272 flow [2024-06-21 20:03:37,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:37,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 20:03:37,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-21 20:03:37,550 INFO L175 Difference]: Start difference. First operand has 145 places, 161 transitions, 1770 flow. Second operand 8 states and 193 transitions. [2024-06-21 20:03:37,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 197 transitions, 2272 flow [2024-06-21 20:03:37,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 197 transitions, 2201 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 20:03:37,606 INFO L231 Difference]: Finished difference. Result has 145 places, 162 transitions, 1791 flow [2024-06-21 20:03:37,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1699, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1791, PETRI_PLACES=145, PETRI_TRANSITIONS=162} [2024-06-21 20:03:37,607 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-21 20:03:37,607 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 162 transitions, 1791 flow [2024-06-21 20:03:37,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:37,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:37,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:37,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:03:37,608 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:37,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:37,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1328506971, now seen corresponding path program 6 times [2024-06-21 20:03:37,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:37,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252612117] [2024-06-21 20:03:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:37,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:37,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:37,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252612117] [2024-06-21 20:03:37,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252612117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:37,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:37,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:37,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289452132] [2024-06-21 20:03:37,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:37,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:37,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:37,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:37,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:37,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 162 transitions, 1791 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:37,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:37,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:37,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:38,108 INFO L124 PetriNetUnfolderBase]: 1623/2708 cut-off events. [2024-06-21 20:03:38,108 INFO L125 PetriNetUnfolderBase]: For 54412/54412 co-relation queries the response was YES. [2024-06-21 20:03:38,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15191 conditions, 2708 events. 1623/2708 cut-off events. For 54412/54412 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 15617 event pairs, 370 based on Foata normal form. 12/2715 useless extension candidates. Maximal degree in co-relation 15121. Up to 2159 conditions per place. [2024-06-21 20:03:38,128 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 161 selfloop transitions, 35 changer transitions 0/203 dead transitions. [2024-06-21 20:03:38,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 203 transitions, 2351 flow [2024-06-21 20:03:38,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:38,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:38,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 20:03:38,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-21 20:03:38,129 INFO L175 Difference]: Start difference. First operand has 145 places, 162 transitions, 1791 flow. Second operand 8 states and 195 transitions. [2024-06-21 20:03:38,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 203 transitions, 2351 flow [2024-06-21 20:03:38,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 203 transitions, 2280 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:38,191 INFO L231 Difference]: Finished difference. Result has 148 places, 165 transitions, 1862 flow [2024-06-21 20:03:38,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1862, PETRI_PLACES=148, PETRI_TRANSITIONS=165} [2024-06-21 20:03:38,191 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-21 20:03:38,191 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 165 transitions, 1862 flow [2024-06-21 20:03:38,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:38,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:38,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:38,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:03:38,192 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:38,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:38,192 INFO L85 PathProgramCache]: Analyzing trace with hash 921832277, now seen corresponding path program 1 times [2024-06-21 20:03:38,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:38,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949678466] [2024-06-21 20:03:38,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:38,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:38,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:38,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949678466] [2024-06-21 20:03:38,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949678466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:38,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:38,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:38,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107350278] [2024-06-21 20:03:38,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:38,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:38,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:38,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:38,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:38,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:38,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 165 transitions, 1862 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:38,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:38,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:38,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:38,710 INFO L124 PetriNetUnfolderBase]: 1664/2789 cut-off events. [2024-06-21 20:03:38,710 INFO L125 PetriNetUnfolderBase]: For 58394/58394 co-relation queries the response was YES. [2024-06-21 20:03:38,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15663 conditions, 2789 events. 1664/2789 cut-off events. For 58394/58394 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 16221 event pairs, 385 based on Foata normal form. 12/2796 useless extension candidates. Maximal degree in co-relation 15591. Up to 2230 conditions per place. [2024-06-21 20:03:38,732 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 168 selfloop transitions, 37 changer transitions 0/212 dead transitions. [2024-06-21 20:03:38,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 212 transitions, 2423 flow [2024-06-21 20:03:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:03:38,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:03:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-21 20:03:38,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 20:03:38,733 INFO L175 Difference]: Start difference. First operand has 148 places, 165 transitions, 1862 flow. Second operand 10 states and 235 transitions. [2024-06-21 20:03:38,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 212 transitions, 2423 flow [2024-06-21 20:03:38,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 212 transitions, 2365 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:38,803 INFO L231 Difference]: Finished difference. Result has 154 places, 166 transitions, 1902 flow [2024-06-21 20:03:38,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1902, PETRI_PLACES=154, PETRI_TRANSITIONS=166} [2024-06-21 20:03:38,803 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-21 20:03:38,803 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 166 transitions, 1902 flow [2024-06-21 20:03:38,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:38,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:38,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:38,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:03:38,804 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:38,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:38,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1056163355, now seen corresponding path program 7 times [2024-06-21 20:03:38,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:38,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845796025] [2024-06-21 20:03:38,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:38,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:38,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:38,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:38,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845796025] [2024-06-21 20:03:38,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845796025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:38,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:38,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:38,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257522666] [2024-06-21 20:03:38,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:38,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:38,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:38,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:38,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:38,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:38,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 166 transitions, 1902 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:38,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:38,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:38,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:39,275 INFO L124 PetriNetUnfolderBase]: 1722/2887 cut-off events. [2024-06-21 20:03:39,275 INFO L125 PetriNetUnfolderBase]: For 64138/64138 co-relation queries the response was YES. [2024-06-21 20:03:39,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16320 conditions, 2887 events. 1722/2887 cut-off events. For 64138/64138 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 17008 event pairs, 412 based on Foata normal form. 16/2898 useless extension candidates. Maximal degree in co-relation 16246. Up to 2364 conditions per place. [2024-06-21 20:03:39,308 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 148 selfloop transitions, 46 changer transitions 0/201 dead transitions. [2024-06-21 20:03:39,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 201 transitions, 2414 flow [2024-06-21 20:03:39,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:03:39,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:03:39,309 INFO L175 Difference]: Start difference. First operand has 154 places, 166 transitions, 1902 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:03:39,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 201 transitions, 2414 flow [2024-06-21 20:03:39,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 201 transitions, 2330 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 20:03:39,388 INFO L231 Difference]: Finished difference. Result has 153 places, 167 transitions, 1945 flow [2024-06-21 20:03:39,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1945, PETRI_PLACES=153, PETRI_TRANSITIONS=167} [2024-06-21 20:03:39,389 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-21 20:03:39,389 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 167 transitions, 1945 flow [2024-06-21 20:03:39,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:39,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:39,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:39,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:03:39,389 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:39,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:39,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1267334579, now seen corresponding path program 8 times [2024-06-21 20:03:39,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:39,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112555160] [2024-06-21 20:03:39,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:39,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:39,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:39,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112555160] [2024-06-21 20:03:39,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112555160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:39,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:39,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:39,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292785311] [2024-06-21 20:03:39,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:39,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:39,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:39,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:39,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:39,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:39,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 167 transitions, 1945 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:39,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:39,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:39,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:39,917 INFO L124 PetriNetUnfolderBase]: 1780/2985 cut-off events. [2024-06-21 20:03:39,917 INFO L125 PetriNetUnfolderBase]: For 69433/69433 co-relation queries the response was YES. [2024-06-21 20:03:39,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16929 conditions, 2985 events. 1780/2985 cut-off events. For 69433/69433 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17739 event pairs, 422 based on Foata normal form. 16/2996 useless extension candidates. Maximal degree in co-relation 16854. Up to 2462 conditions per place. [2024-06-21 20:03:39,936 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 155 selfloop transitions, 48 changer transitions 0/210 dead transitions. [2024-06-21 20:03:39,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 210 transitions, 2497 flow [2024-06-21 20:03:39,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:03:39,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:03:39,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-21 20:03:39,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-21 20:03:39,937 INFO L175 Difference]: Start difference. First operand has 153 places, 167 transitions, 1945 flow. Second operand 9 states and 217 transitions. [2024-06-21 20:03:39,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 210 transitions, 2497 flow [2024-06-21 20:03:40,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 210 transitions, 2401 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:40,010 INFO L231 Difference]: Finished difference. Result has 157 places, 168 transitions, 1982 flow [2024-06-21 20:03:40,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1849, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1982, PETRI_PLACES=157, PETRI_TRANSITIONS=168} [2024-06-21 20:03:40,011 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-21 20:03:40,011 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 168 transitions, 1982 flow [2024-06-21 20:03:40,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:40,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:40,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:40,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:03:40,012 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:40,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:40,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1719167379, now seen corresponding path program 9 times [2024-06-21 20:03:40,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:40,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94354188] [2024-06-21 20:03:40,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:40,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:40,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:40,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94354188] [2024-06-21 20:03:40,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94354188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:40,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:40,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:40,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517577092] [2024-06-21 20:03:40,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:40,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:40,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:40,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:40,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:40,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:40,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 168 transitions, 1982 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:40,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:40,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:40,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:40,549 INFO L124 PetriNetUnfolderBase]: 1813/3059 cut-off events. [2024-06-21 20:03:40,550 INFO L125 PetriNetUnfolderBase]: For 72643/72655 co-relation queries the response was YES. [2024-06-21 20:03:40,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17230 conditions, 3059 events. 1813/3059 cut-off events. For 72643/72655 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 18443 event pairs, 446 based on Foata normal form. 26/3079 useless extension candidates. Maximal degree in co-relation 17154. Up to 2613 conditions per place. [2024-06-21 20:03:40,574 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 155 selfloop transitions, 46 changer transitions 0/208 dead transitions. [2024-06-21 20:03:40,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 208 transitions, 2524 flow [2024-06-21 20:03:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:03:40,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:03:40,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-21 20:03:40,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-21 20:03:40,575 INFO L175 Difference]: Start difference. First operand has 157 places, 168 transitions, 1982 flow. Second operand 9 states and 212 transitions. [2024-06-21 20:03:40,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 208 transitions, 2524 flow [2024-06-21 20:03:40,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 208 transitions, 2422 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 20:03:40,668 INFO L231 Difference]: Finished difference. Result has 159 places, 169 transitions, 2008 flow [2024-06-21 20:03:40,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1880, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2008, PETRI_PLACES=159, PETRI_TRANSITIONS=169} [2024-06-21 20:03:40,668 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-21 20:03:40,668 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 169 transitions, 2008 flow [2024-06-21 20:03:40,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:40,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:40,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:40,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:03:40,669 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:40,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:40,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1056311225, now seen corresponding path program 10 times [2024-06-21 20:03:40,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:40,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671213687] [2024-06-21 20:03:40,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:40,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:40,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:40,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671213687] [2024-06-21 20:03:40,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671213687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:40,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:40,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:40,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78206270] [2024-06-21 20:03:40,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:40,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:40,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:40,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:40,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:40,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:40,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 169 transitions, 2008 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:40,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:40,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:40,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:41,283 INFO L124 PetriNetUnfolderBase]: 1793/3022 cut-off events. [2024-06-21 20:03:41,284 INFO L125 PetriNetUnfolderBase]: For 67395/67395 co-relation queries the response was YES. [2024-06-21 20:03:41,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16741 conditions, 3022 events. 1793/3022 cut-off events. For 67395/67395 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18089 event pairs, 311 based on Foata normal form. 12/3029 useless extension candidates. Maximal degree in co-relation 16664. Up to 2009 conditions per place. [2024-06-21 20:03:41,314 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 147 selfloop transitions, 54 changer transitions 0/208 dead transitions. [2024-06-21 20:03:41,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 208 transitions, 2563 flow [2024-06-21 20:03:41,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:41,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:41,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:03:41,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-21 20:03:41,315 INFO L175 Difference]: Start difference. First operand has 159 places, 169 transitions, 2008 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:03:41,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 208 transitions, 2563 flow [2024-06-21 20:03:41,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 208 transitions, 2444 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 20:03:41,420 INFO L231 Difference]: Finished difference. Result has 160 places, 171 transitions, 2070 flow [2024-06-21 20:03:41,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1895, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2070, PETRI_PLACES=160, PETRI_TRANSITIONS=171} [2024-06-21 20:03:41,420 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-21 20:03:41,420 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 171 transitions, 2070 flow [2024-06-21 20:03:41,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:41,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:41,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:41,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:03:41,421 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:41,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:41,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1050585773, now seen corresponding path program 2 times [2024-06-21 20:03:41,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:41,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009668823] [2024-06-21 20:03:41,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:41,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:41,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:41,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009668823] [2024-06-21 20:03:41,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009668823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:41,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:41,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:41,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477397092] [2024-06-21 20:03:41,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:41,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:41,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:41,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:41,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:41,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:41,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 171 transitions, 2070 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:41,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:41,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:41,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:41,987 INFO L124 PetriNetUnfolderBase]: 1834/3103 cut-off events. [2024-06-21 20:03:41,987 INFO L125 PetriNetUnfolderBase]: For 71115/71115 co-relation queries the response was YES. [2024-06-21 20:03:42,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17222 conditions, 3103 events. 1834/3103 cut-off events. For 71115/71115 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18741 event pairs, 404 based on Foata normal form. 12/3110 useless extension candidates. Maximal degree in co-relation 17143. Up to 2202 conditions per place. [2024-06-21 20:03:42,012 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 154 selfloop transitions, 56 changer transitions 0/217 dead transitions. [2024-06-21 20:03:42,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 217 transitions, 2641 flow [2024-06-21 20:03:42,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:03:42,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:03:42,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-21 20:03:42,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-21 20:03:42,014 INFO L175 Difference]: Start difference. First operand has 160 places, 171 transitions, 2070 flow. Second operand 9 states and 219 transitions. [2024-06-21 20:03:42,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 217 transitions, 2641 flow [2024-06-21 20:03:42,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 217 transitions, 2472 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 20:03:42,112 INFO L231 Difference]: Finished difference. Result has 162 places, 172 transitions, 2041 flow [2024-06-21 20:03:42,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1901, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2041, PETRI_PLACES=162, PETRI_TRANSITIONS=172} [2024-06-21 20:03:42,113 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-21 20:03:42,113 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 172 transitions, 2041 flow [2024-06-21 20:03:42,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:42,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:42,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:42,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:03:42,113 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:42,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:42,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1719382581, now seen corresponding path program 3 times [2024-06-21 20:03:42,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:42,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512041898] [2024-06-21 20:03:42,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:42,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:42,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:42,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:42,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512041898] [2024-06-21 20:03:42,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512041898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:42,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:42,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:42,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830433245] [2024-06-21 20:03:42,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:42,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:42,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:42,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:42,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:42,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:42,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 172 transitions, 2041 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:42,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:42,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:42,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:42,679 INFO L124 PetriNetUnfolderBase]: 1875/3189 cut-off events. [2024-06-21 20:03:42,679 INFO L125 PetriNetUnfolderBase]: For 71518/71530 co-relation queries the response was YES. [2024-06-21 20:03:42,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17305 conditions, 3189 events. 1875/3189 cut-off events. For 71518/71530 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19572 event pairs, 447 based on Foata normal form. 22/3205 useless extension candidates. Maximal degree in co-relation 17227. Up to 2636 conditions per place. [2024-06-21 20:03:42,705 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 163 selfloop transitions, 49 changer transitions 0/219 dead transitions. [2024-06-21 20:03:42,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 219 transitions, 2620 flow [2024-06-21 20:03:42,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:03:42,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:03:42,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-21 20:03:42,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 20:03:42,706 INFO L175 Difference]: Start difference. First operand has 162 places, 172 transitions, 2041 flow. Second operand 10 states and 235 transitions. [2024-06-21 20:03:42,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 219 transitions, 2620 flow [2024-06-21 20:03:42,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 219 transitions, 2492 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 20:03:42,799 INFO L231 Difference]: Finished difference. Result has 165 places, 173 transitions, 2039 flow [2024-06-21 20:03:42,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2039, PETRI_PLACES=165, PETRI_TRANSITIONS=173} [2024-06-21 20:03:42,800 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-21 20:03:42,800 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 173 transitions, 2039 flow [2024-06-21 20:03:42,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:42,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:42,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:42,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:03:42,800 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:42,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:42,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1726791891, now seen corresponding path program 4 times [2024-06-21 20:03:42,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:42,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309181477] [2024-06-21 20:03:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:42,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:42,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:42,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309181477] [2024-06-21 20:03:42,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309181477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:42,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:42,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:42,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931197768] [2024-06-21 20:03:42,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:42,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:42,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:42,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:42,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:42,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:42,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 173 transitions, 2039 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:42,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:42,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:42,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:43,324 INFO L124 PetriNetUnfolderBase]: 1855/3157 cut-off events. [2024-06-21 20:03:43,324 INFO L125 PetriNetUnfolderBase]: For 64305/64317 co-relation queries the response was YES. [2024-06-21 20:03:43,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16652 conditions, 3157 events. 1855/3157 cut-off events. For 64305/64317 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19305 event pairs, 404 based on Foata normal form. 22/3173 useless extension candidates. Maximal degree in co-relation 16573. Up to 1952 conditions per place. [2024-06-21 20:03:43,350 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 148 selfloop transitions, 60 changer transitions 0/215 dead transitions. [2024-06-21 20:03:43,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 215 transitions, 2516 flow [2024-06-21 20:03:43,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:03:43,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:03:43,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-21 20:03:43,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-06-21 20:03:43,351 INFO L175 Difference]: Start difference. First operand has 165 places, 173 transitions, 2039 flow. Second operand 9 states and 214 transitions. [2024-06-21 20:03:43,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 215 transitions, 2516 flow [2024-06-21 20:03:43,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 215 transitions, 2406 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 20:03:43,430 INFO L231 Difference]: Finished difference. Result has 165 places, 172 transitions, 1987 flow [2024-06-21 20:03:43,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1863, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1987, PETRI_PLACES=165, PETRI_TRANSITIONS=172} [2024-06-21 20:03:43,430 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-21 20:03:43,431 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 172 transitions, 1987 flow [2024-06-21 20:03:43,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:43,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:43,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:43,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:03:43,431 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:43,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:43,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1369809045, now seen corresponding path program 1 times [2024-06-21 20:03:43,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:43,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523838950] [2024-06-21 20:03:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:43,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:43,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:43,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523838950] [2024-06-21 20:03:43,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523838950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:43,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:43,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:43,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734141970] [2024-06-21 20:03:43,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:43,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:43,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:43,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:43,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:43,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:43,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 172 transitions, 1987 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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) [2024-06-21 20:03:43,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:43,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:43,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:43,838 INFO L124 PetriNetUnfolderBase]: 1860/3176 cut-off events. [2024-06-21 20:03:43,839 INFO L125 PetriNetUnfolderBase]: For 61040/61043 co-relation queries the response was YES. [2024-06-21 20:03:43,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16851 conditions, 3176 events. 1860/3176 cut-off events. For 61040/61043 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19511 event pairs, 436 based on Foata normal form. 3/3176 useless extension candidates. Maximal degree in co-relation 16771. Up to 2913 conditions per place. [2024-06-21 20:03:43,863 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 168 selfloop transitions, 17 changer transitions 0/192 dead transitions. [2024-06-21 20:03:43,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 192 transitions, 2528 flow [2024-06-21 20:03:43,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:43,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:43,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 20:03:43,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-21 20:03:43,864 INFO L175 Difference]: Start difference. First operand has 165 places, 172 transitions, 1987 flow. Second operand 5 states and 118 transitions. [2024-06-21 20:03:43,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 192 transitions, 2528 flow [2024-06-21 20:03:43,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 192 transitions, 2359 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 20:03:43,943 INFO L231 Difference]: Finished difference. Result has 162 places, 178 transitions, 1928 flow [2024-06-21 20:03:43,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1928, PETRI_PLACES=162, PETRI_TRANSITIONS=178} [2024-06-21 20:03:43,943 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-21 20:03:43,944 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 178 transitions, 1928 flow [2024-06-21 20:03:43,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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) [2024-06-21 20:03:43,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:43,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:43,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:03:43,944 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:43,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:43,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1390254165, now seen corresponding path program 2 times [2024-06-21 20:03:43,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:43,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491526192] [2024-06-21 20:03:43,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:43,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:44,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:44,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491526192] [2024-06-21 20:03:44,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491526192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:44,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:44,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:44,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657663411] [2024-06-21 20:03:44,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:44,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:44,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:44,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:44,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:44,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:44,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 178 transitions, 1928 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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) [2024-06-21 20:03:44,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:44,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:44,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:44,361 INFO L124 PetriNetUnfolderBase]: 1857/3172 cut-off events. [2024-06-21 20:03:44,362 INFO L125 PetriNetUnfolderBase]: For 62846/62849 co-relation queries the response was YES. [2024-06-21 20:03:44,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16523 conditions, 3172 events. 1857/3172 cut-off events. For 62846/62849 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19528 event pairs, 436 based on Foata normal form. 3/3172 useless extension candidates. Maximal degree in co-relation 16443. Up to 2913 conditions per place. [2024-06-21 20:03:44,388 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 169 selfloop transitions, 14 changer transitions 0/190 dead transitions. [2024-06-21 20:03:44,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 190 transitions, 2329 flow [2024-06-21 20:03:44,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:03:44,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:03:44,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-21 20:03:44,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-21 20:03:44,389 INFO L175 Difference]: Start difference. First operand has 162 places, 178 transitions, 1928 flow. Second operand 4 states and 99 transitions. [2024-06-21 20:03:44,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 190 transitions, 2329 flow [2024-06-21 20:03:44,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 190 transitions, 2277 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:44,464 INFO L231 Difference]: Finished difference. Result has 165 places, 178 transitions, 1914 flow [2024-06-21 20:03:44,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1914, PETRI_PLACES=165, PETRI_TRANSITIONS=178} [2024-06-21 20:03:44,465 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-21 20:03:44,465 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 178 transitions, 1914 flow [2024-06-21 20:03:44,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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) [2024-06-21 20:03:44,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:44,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:44,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:03:44,466 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:44,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:44,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1106330957, now seen corresponding path program 1 times [2024-06-21 20:03:44,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:44,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903270550] [2024-06-21 20:03:44,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:44,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:44,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:44,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903270550] [2024-06-21 20:03:44,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903270550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:44,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:44,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:44,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966878725] [2024-06-21 20:03:44,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:44,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:44,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:44,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:44,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:44,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:44,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 178 transitions, 1914 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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) [2024-06-21 20:03:44,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:44,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:44,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:44,912 INFO L124 PetriNetUnfolderBase]: 1798/3082 cut-off events. [2024-06-21 20:03:44,913 INFO L125 PetriNetUnfolderBase]: For 69424/69445 co-relation queries the response was YES. [2024-06-21 20:03:44,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16128 conditions, 3082 events. 1798/3082 cut-off events. For 69424/69445 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 19086 event pairs, 426 based on Foata normal form. 28/3077 useless extension candidates. Maximal degree in co-relation 16046. Up to 2731 conditions per place. [2024-06-21 20:03:44,935 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 146 selfloop transitions, 29 changer transitions 0/191 dead transitions. [2024-06-21 20:03:44,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 191 transitions, 2322 flow [2024-06-21 20:03:44,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:44,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:44,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-21 20:03:44,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:03:44,936 INFO L175 Difference]: Start difference. First operand has 165 places, 178 transitions, 1914 flow. Second operand 5 states and 120 transitions. [2024-06-21 20:03:44,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 191 transitions, 2322 flow [2024-06-21 20:03:45,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 191 transitions, 2294 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:45,024 INFO L231 Difference]: Finished difference. Result has 167 places, 181 transitions, 1991 flow [2024-06-21 20:03:45,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1886, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1991, PETRI_PLACES=167, PETRI_TRANSITIONS=181} [2024-06-21 20:03:45,024 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-21 20:03:45,025 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 181 transitions, 1991 flow [2024-06-21 20:03:45,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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) [2024-06-21 20:03:45,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:45,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:45,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:03:45,026 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:45,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:45,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1385967847, now seen corresponding path program 1 times [2024-06-21 20:03:45,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:45,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27323156] [2024-06-21 20:03:45,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:45,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:45,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:45,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27323156] [2024-06-21 20:03:45,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27323156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:45,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:45,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:45,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201918045] [2024-06-21 20:03:45,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:45,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:45,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:45,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:45,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:45,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:45,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 181 transitions, 1991 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:45,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:45,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:45,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:45,449 INFO L124 PetriNetUnfolderBase]: 1873/3183 cut-off events. [2024-06-21 20:03:45,449 INFO L125 PetriNetUnfolderBase]: For 67415/67424 co-relation queries the response was YES. [2024-06-21 20:03:45,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16901 conditions, 3183 events. 1873/3183 cut-off events. For 67415/67424 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19463 event pairs, 436 based on Foata normal form. 9/3189 useless extension candidates. Maximal degree in co-relation 16818. Up to 2901 conditions per place. [2024-06-21 20:03:45,476 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 178 selfloop transitions, 24 changer transitions 0/209 dead transitions. [2024-06-21 20:03:45,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 209 transitions, 2624 flow [2024-06-21 20:03:45,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:45,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:45,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 20:03:45,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 20:03:45,480 INFO L175 Difference]: Start difference. First operand has 167 places, 181 transitions, 1991 flow. Second operand 6 states and 141 transitions. [2024-06-21 20:03:45,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 209 transitions, 2624 flow [2024-06-21 20:03:45,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 209 transitions, 2539 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:45,586 INFO L231 Difference]: Finished difference. Result has 173 places, 189 transitions, 2074 flow [2024-06-21 20:03:45,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1910, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2074, PETRI_PLACES=173, PETRI_TRANSITIONS=189} [2024-06-21 20:03:45,586 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-21 20:03:45,586 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 189 transitions, 2074 flow [2024-06-21 20:03:45,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:45,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:45,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:45,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:03:45,587 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:45,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:45,587 INFO L85 PathProgramCache]: Analyzing trace with hash 2025313087, now seen corresponding path program 2 times [2024-06-21 20:03:45,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:45,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342962516] [2024-06-21 20:03:45,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:45,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:45,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:45,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342962516] [2024-06-21 20:03:45,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342962516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:45,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:45,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:45,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565099707] [2024-06-21 20:03:45,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:45,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:45,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:45,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:45,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:45,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:45,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 189 transitions, 2074 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:45,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:45,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:45,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:46,047 INFO L124 PetriNetUnfolderBase]: 1878/3193 cut-off events. [2024-06-21 20:03:46,047 INFO L125 PetriNetUnfolderBase]: For 70317/70323 co-relation queries the response was YES. [2024-06-21 20:03:46,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17001 conditions, 3193 events. 1878/3193 cut-off events. For 70317/70323 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 19581 event pairs, 447 based on Foata normal form. 3/3191 useless extension candidates. Maximal degree in co-relation 16914. Up to 2907 conditions per place. [2024-06-21 20:03:46,073 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 170 selfloop transitions, 29 changer transitions 0/206 dead transitions. [2024-06-21 20:03:46,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 206 transitions, 2648 flow [2024-06-21 20:03:46,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:46,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:46,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 20:03:46,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-21 20:03:46,074 INFO L175 Difference]: Start difference. First operand has 173 places, 189 transitions, 2074 flow. Second operand 5 states and 118 transitions. [2024-06-21 20:03:46,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 206 transitions, 2648 flow [2024-06-21 20:03:46,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 206 transitions, 2615 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:46,198 INFO L231 Difference]: Finished difference. Result has 178 places, 194 transitions, 2177 flow [2024-06-21 20:03:46,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2047, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2177, PETRI_PLACES=178, PETRI_TRANSITIONS=194} [2024-06-21 20:03:46,199 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-21 20:03:46,199 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 194 transitions, 2177 flow [2024-06-21 20:03:46,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:46,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:46,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:46,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:03:46,199 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:46,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:46,200 INFO L85 PathProgramCache]: Analyzing trace with hash 2025301927, now seen corresponding path program 3 times [2024-06-21 20:03:46,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:46,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234911017] [2024-06-21 20:03:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:46,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:46,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:46,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234911017] [2024-06-21 20:03:46,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234911017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:46,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:46,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:46,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66226974] [2024-06-21 20:03:46,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:46,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:46,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:46,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:46,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:46,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:46,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 194 transitions, 2177 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:46,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:46,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:46,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:46,666 INFO L124 PetriNetUnfolderBase]: 1875/3192 cut-off events. [2024-06-21 20:03:46,666 INFO L125 PetriNetUnfolderBase]: For 72874/72886 co-relation queries the response was YES. [2024-06-21 20:03:46,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17079 conditions, 3192 events. 1875/3192 cut-off events. For 72874/72886 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 19635 event pairs, 439 based on Foata normal form. 11/3200 useless extension candidates. Maximal degree in co-relation 16989. Up to 2904 conditions per place. [2024-06-21 20:03:46,695 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 176 selfloop transitions, 28 changer transitions 0/211 dead transitions. [2024-06-21 20:03:46,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 211 transitions, 2646 flow [2024-06-21 20:03:46,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-21 20:03:46,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-21 20:03:46,696 INFO L175 Difference]: Start difference. First operand has 178 places, 194 transitions, 2177 flow. Second operand 5 states and 122 transitions. [2024-06-21 20:03:46,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 211 transitions, 2646 flow [2024-06-21 20:03:46,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 211 transitions, 2623 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:46,824 INFO L231 Difference]: Finished difference. Result has 182 places, 194 transitions, 2220 flow [2024-06-21 20:03:46,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2154, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2220, PETRI_PLACES=182, PETRI_TRANSITIONS=194} [2024-06-21 20:03:46,825 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-21 20:03:46,825 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 194 transitions, 2220 flow [2024-06-21 20:03:46,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:46,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:46,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:46,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:03:46,825 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:46,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:46,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1187095605, now seen corresponding path program 1 times [2024-06-21 20:03:46,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:46,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620089887] [2024-06-21 20:03:46,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:46,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:46,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:46,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620089887] [2024-06-21 20:03:46,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620089887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:46,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:46,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:46,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984123684] [2024-06-21 20:03:46,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:46,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:46,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:46,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:46,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:46,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:46,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 194 transitions, 2220 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:46,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:46,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:46,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:47,269 INFO L124 PetriNetUnfolderBase]: 1903/3241 cut-off events. [2024-06-21 20:03:47,269 INFO L125 PetriNetUnfolderBase]: For 79364/79379 co-relation queries the response was YES. [2024-06-21 20:03:47,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17515 conditions, 3241 events. 1903/3241 cut-off events. For 79364/79379 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20041 event pairs, 456 based on Foata normal form. 14/3249 useless extension candidates. Maximal degree in co-relation 17423. Up to 2825 conditions per place. [2024-06-21 20:03:47,297 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 169 selfloop transitions, 46 changer transitions 0/222 dead transitions. [2024-06-21 20:03:47,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 222 transitions, 3002 flow [2024-06-21 20:03:47,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:47,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:47,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 20:03:47,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:03:47,298 INFO L175 Difference]: Start difference. First operand has 182 places, 194 transitions, 2220 flow. Second operand 6 states and 144 transitions. [2024-06-21 20:03:47,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 222 transitions, 3002 flow [2024-06-21 20:03:47,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 222 transitions, 2944 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:47,423 INFO L231 Difference]: Finished difference. Result has 185 places, 205 transitions, 2413 flow [2024-06-21 20:03:47,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2166, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2413, PETRI_PLACES=185, PETRI_TRANSITIONS=205} [2024-06-21 20:03:47,424 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-21 20:03:47,424 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 205 transitions, 2413 flow [2024-06-21 20:03:47,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:47,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:47,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:47,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:03:47,425 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:47,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:47,425 INFO L85 PathProgramCache]: Analyzing trace with hash 148212823, now seen corresponding path program 2 times [2024-06-21 20:03:47,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:47,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985370770] [2024-06-21 20:03:47,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:47,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:47,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:47,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985370770] [2024-06-21 20:03:47,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985370770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:47,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:47,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:47,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222921829] [2024-06-21 20:03:47,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:47,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:47,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:47,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:47,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:47,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:47,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 205 transitions, 2413 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:47,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:47,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:47,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:47,914 INFO L124 PetriNetUnfolderBase]: 1921/3270 cut-off events. [2024-06-21 20:03:47,914 INFO L125 PetriNetUnfolderBase]: For 81814/81829 co-relation queries the response was YES. [2024-06-21 20:03:47,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18184 conditions, 3270 events. 1921/3270 cut-off events. For 81814/81829 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20234 event pairs, 454 based on Foata normal form. 14/3278 useless extension candidates. Maximal degree in co-relation 18091. Up to 2868 conditions per place. [2024-06-21 20:03:47,943 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 170 selfloop transitions, 53 changer transitions 0/230 dead transitions. [2024-06-21 20:03:47,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 230 transitions, 3183 flow [2024-06-21 20:03:47,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:47,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:47,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 20:03:47,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-21 20:03:47,943 INFO L175 Difference]: Start difference. First operand has 185 places, 205 transitions, 2413 flow. Second operand 7 states and 163 transitions. [2024-06-21 20:03:47,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 230 transitions, 3183 flow [2024-06-21 20:03:48,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 230 transitions, 3086 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:48,081 INFO L231 Difference]: Finished difference. Result has 192 places, 214 transitions, 2584 flow [2024-06-21 20:03:48,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2328, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2584, PETRI_PLACES=192, PETRI_TRANSITIONS=214} [2024-06-21 20:03:48,082 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-21 20:03:48,082 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 214 transitions, 2584 flow [2024-06-21 20:03:48,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:48,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:48,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:48,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:03:48,082 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:48,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:48,082 INFO L85 PathProgramCache]: Analyzing trace with hash 148207243, now seen corresponding path program 3 times [2024-06-21 20:03:48,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:48,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619805866] [2024-06-21 20:03:48,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:48,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:48,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:48,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619805866] [2024-06-21 20:03:48,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619805866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:48,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:48,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:48,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038920961] [2024-06-21 20:03:48,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:48,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:48,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:48,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:48,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:48,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:48,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 214 transitions, 2584 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:48,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:48,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:48,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:48,592 INFO L124 PetriNetUnfolderBase]: 1917/3266 cut-off events. [2024-06-21 20:03:48,593 INFO L125 PetriNetUnfolderBase]: For 84192/84207 co-relation queries the response was YES. [2024-06-21 20:03:48,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18348 conditions, 3266 events. 1917/3266 cut-off events. For 84192/84207 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20219 event pairs, 458 based on Foata normal form. 14/3274 useless extension candidates. Maximal degree in co-relation 18252. Up to 2866 conditions per place. [2024-06-21 20:03:48,620 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 175 selfloop transitions, 45 changer transitions 0/227 dead transitions. [2024-06-21 20:03:48,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 227 transitions, 3138 flow [2024-06-21 20:03:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:48,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 20:03:48,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-21 20:03:48,621 INFO L175 Difference]: Start difference. First operand has 192 places, 214 transitions, 2584 flow. Second operand 5 states and 123 transitions. [2024-06-21 20:03:48,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 227 transitions, 3138 flow [2024-06-21 20:03:48,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 227 transitions, 2980 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:48,782 INFO L231 Difference]: Finished difference. Result has 193 places, 214 transitions, 2524 flow [2024-06-21 20:03:48,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2426, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2524, PETRI_PLACES=193, PETRI_TRANSITIONS=214} [2024-06-21 20:03:48,783 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-21 20:03:48,783 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 214 transitions, 2524 flow [2024-06-21 20:03:48,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:48,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:48,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:48,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:03:48,783 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:48,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:48,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1376312012, now seen corresponding path program 1 times [2024-06-21 20:03:48,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:48,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921280787] [2024-06-21 20:03:48,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:48,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:48,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:48,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921280787] [2024-06-21 20:03:48,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921280787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:48,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:48,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:48,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123877985] [2024-06-21 20:03:48,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:48,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:48,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:48,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:48,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:48,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:48,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 214 transitions, 2524 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:48,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:48,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:48,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:49,279 INFO L124 PetriNetUnfolderBase]: 1938/3292 cut-off events. [2024-06-21 20:03:49,279 INFO L125 PetriNetUnfolderBase]: For 87861/87861 co-relation queries the response was YES. [2024-06-21 20:03:49,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18695 conditions, 3292 events. 1938/3292 cut-off events. For 87861/87861 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20314 event pairs, 448 based on Foata normal form. 1/3284 useless extension candidates. Maximal degree in co-relation 18598. Up to 2861 conditions per place. [2024-06-21 20:03:49,306 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 172 selfloop transitions, 67 changer transitions 0/246 dead transitions. [2024-06-21 20:03:49,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 246 transitions, 3328 flow [2024-06-21 20:03:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:49,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:03:49,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-21 20:03:49,307 INFO L175 Difference]: Start difference. First operand has 193 places, 214 transitions, 2524 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:03:49,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 246 transitions, 3328 flow [2024-06-21 20:03:49,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 246 transitions, 3230 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:49,439 INFO L231 Difference]: Finished difference. Result has 196 places, 221 transitions, 2662 flow [2024-06-21 20:03:49,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2434, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2662, PETRI_PLACES=196, PETRI_TRANSITIONS=221} [2024-06-21 20:03:49,440 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-21 20:03:49,440 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 221 transitions, 2662 flow [2024-06-21 20:03:49,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:49,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:49,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:49,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:03:49,440 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:49,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:49,441 INFO L85 PathProgramCache]: Analyzing trace with hash -933443626, now seen corresponding path program 2 times [2024-06-21 20:03:49,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:49,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365104368] [2024-06-21 20:03:49,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:49,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:49,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:49,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365104368] [2024-06-21 20:03:49,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365104368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:49,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:49,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:49,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554344544] [2024-06-21 20:03:49,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:49,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:49,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:49,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:49,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:49,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:49,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 221 transitions, 2662 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:49,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:49,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:49,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:50,022 INFO L124 PetriNetUnfolderBase]: 1948/3309 cut-off events. [2024-06-21 20:03:50,022 INFO L125 PetriNetUnfolderBase]: For 91454/91457 co-relation queries the response was YES. [2024-06-21 20:03:50,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18965 conditions, 3309 events. 1948/3309 cut-off events. For 91454/91457 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20410 event pairs, 436 based on Foata normal form. 3/3307 useless extension candidates. Maximal degree in co-relation 18867. Up to 2973 conditions per place. [2024-06-21 20:03:50,053 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 201 selfloop transitions, 39 changer transitions 0/247 dead transitions. [2024-06-21 20:03:50,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 247 transitions, 3281 flow [2024-06-21 20:03:50,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:50,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:50,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 20:03:50,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-21 20:03:50,054 INFO L175 Difference]: Start difference. First operand has 196 places, 221 transitions, 2662 flow. Second operand 7 states and 165 transitions. [2024-06-21 20:03:50,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 247 transitions, 3281 flow [2024-06-21 20:03:50,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 247 transitions, 3150 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:50,227 INFO L231 Difference]: Finished difference. Result has 200 places, 227 transitions, 2710 flow [2024-06-21 20:03:50,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2543, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2710, PETRI_PLACES=200, PETRI_TRANSITIONS=227} [2024-06-21 20:03:50,227 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-21 20:03:50,227 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 227 transitions, 2710 flow [2024-06-21 20:03:50,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:50,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:50,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:50,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:03:50,228 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:50,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:50,228 INFO L85 PathProgramCache]: Analyzing trace with hash 98775858, now seen corresponding path program 3 times [2024-06-21 20:03:50,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:50,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311793389] [2024-06-21 20:03:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:50,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:50,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:50,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311793389] [2024-06-21 20:03:50,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311793389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:50,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:50,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:50,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166009998] [2024-06-21 20:03:50,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:50,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:50,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:50,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:50,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:50,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:50,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 227 transitions, 2710 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:50,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:50,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:50,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:50,771 INFO L124 PetriNetUnfolderBase]: 1976/3352 cut-off events. [2024-06-21 20:03:50,771 INFO L125 PetriNetUnfolderBase]: For 96247/96250 co-relation queries the response was YES. [2024-06-21 20:03:50,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19303 conditions, 3352 events. 1976/3352 cut-off events. For 96247/96250 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 20665 event pairs, 436 based on Foata normal form. 3/3350 useless extension candidates. Maximal degree in co-relation 19204. Up to 2994 conditions per place. [2024-06-21 20:03:50,801 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 201 selfloop transitions, 53 changer transitions 0/261 dead transitions. [2024-06-21 20:03:50,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 261 transitions, 3582 flow [2024-06-21 20:03:50,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:03:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:03:50,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 20:03:50,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-21 20:03:50,803 INFO L175 Difference]: Start difference. First operand has 200 places, 227 transitions, 2710 flow. Second operand 8 states and 180 transitions. [2024-06-21 20:03:50,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 261 transitions, 3582 flow [2024-06-21 20:03:50,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 261 transitions, 3464 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:50,983 INFO L231 Difference]: Finished difference. Result has 206 places, 242 transitions, 2967 flow [2024-06-21 20:03:50,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2610, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2967, PETRI_PLACES=206, PETRI_TRANSITIONS=242} [2024-06-21 20:03:50,983 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-21 20:03:50,983 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 242 transitions, 2967 flow [2024-06-21 20:03:50,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:50,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:50,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:50,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:03:50,984 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:50,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:50,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2058010098, now seen corresponding path program 4 times [2024-06-21 20:03:50,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:50,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647584843] [2024-06-21 20:03:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:50,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:51,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:51,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647584843] [2024-06-21 20:03:51,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647584843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:51,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:51,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:51,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341667602] [2024-06-21 20:03:51,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:51,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:51,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:51,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:51,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:51,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:51,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 242 transitions, 2967 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:51,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:51,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:51,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:51,459 INFO L124 PetriNetUnfolderBase]: 2005/3400 cut-off events. [2024-06-21 20:03:51,459 INFO L125 PetriNetUnfolderBase]: For 104598/104613 co-relation queries the response was YES. [2024-06-21 20:03:51,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19869 conditions, 3400 events. 2005/3400 cut-off events. For 104598/104613 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 21038 event pairs, 461 based on Foata normal form. 13/3407 useless extension candidates. Maximal degree in co-relation 19767. Up to 2908 conditions per place. [2024-06-21 20:03:51,491 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 183 selfloop transitions, 80 changer transitions 0/270 dead transitions. [2024-06-21 20:03:51,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 270 transitions, 3845 flow [2024-06-21 20:03:51,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:51,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:51,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 20:03:51,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-21 20:03:51,492 INFO L175 Difference]: Start difference. First operand has 206 places, 242 transitions, 2967 flow. Second operand 6 states and 146 transitions. [2024-06-21 20:03:51,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 270 transitions, 3845 flow [2024-06-21 20:03:51,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 270 transitions, 3740 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:51,710 INFO L231 Difference]: Finished difference. Result has 211 places, 252 transitions, 3177 flow [2024-06-21 20:03:51,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2862, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3177, PETRI_PLACES=211, PETRI_TRANSITIONS=252} [2024-06-21 20:03:51,710 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-21 20:03:51,711 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 252 transitions, 3177 flow [2024-06-21 20:03:51,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:51,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:51,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:51,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:03:51,711 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:51,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:51,712 INFO L85 PathProgramCache]: Analyzing trace with hash -449451026, now seen corresponding path program 5 times [2024-06-21 20:03:51,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:51,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632395121] [2024-06-21 20:03:51,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:51,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:51,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:51,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632395121] [2024-06-21 20:03:51,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632395121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:51,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:51,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:51,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695772403] [2024-06-21 20:03:51,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:51,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:51,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:51,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:51,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:51,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:51,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 252 transitions, 3177 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:51,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:51,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:51,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:52,251 INFO L124 PetriNetUnfolderBase]: 2002/3387 cut-off events. [2024-06-21 20:03:52,251 INFO L125 PetriNetUnfolderBase]: For 107006/107006 co-relation queries the response was YES. [2024-06-21 20:03:52,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20044 conditions, 3387 events. 2002/3387 cut-off events. For 107006/107006 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20879 event pairs, 448 based on Foata normal form. 1/3379 useless extension candidates. Maximal degree in co-relation 19940. Up to 2906 conditions per place. [2024-06-21 20:03:52,280 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 168 selfloop transitions, 98 changer transitions 0/273 dead transitions. [2024-06-21 20:03:52,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 273 transitions, 3945 flow [2024-06-21 20:03:52,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:52,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 20:03:52,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-21 20:03:52,281 INFO L175 Difference]: Start difference. First operand has 211 places, 252 transitions, 3177 flow. Second operand 6 states and 151 transitions. [2024-06-21 20:03:52,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 273 transitions, 3945 flow [2024-06-21 20:03:52,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 273 transitions, 3835 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:52,494 INFO L231 Difference]: Finished difference. Result has 215 places, 252 transitions, 3273 flow [2024-06-21 20:03:52,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3067, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3273, PETRI_PLACES=215, PETRI_TRANSITIONS=252} [2024-06-21 20:03:52,495 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2024-06-21 20:03:52,495 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 252 transitions, 3273 flow [2024-06-21 20:03:52,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:52,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:52,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:52,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:03:52,496 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:52,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:52,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1091774712, now seen corresponding path program 6 times [2024-06-21 20:03:52,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:52,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684448998] [2024-06-21 20:03:52,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:52,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:52,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:52,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684448998] [2024-06-21 20:03:52,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684448998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:52,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:52,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:52,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975241012] [2024-06-21 20:03:52,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:52,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:52,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:52,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:52,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:52,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:52,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 252 transitions, 3273 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:52,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:52,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:52,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:53,013 INFO L124 PetriNetUnfolderBase]: 1994/3384 cut-off events. [2024-06-21 20:03:53,013 INFO L125 PetriNetUnfolderBase]: For 111350/111365 co-relation queries the response was YES. [2024-06-21 20:03:53,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20062 conditions, 3384 events. 1994/3384 cut-off events. For 111350/111365 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20974 event pairs, 461 based on Foata normal form. 14/3392 useless extension candidates. Maximal degree in co-relation 19957. Up to 2898 conditions per place. [2024-06-21 20:03:53,047 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 182 selfloop transitions, 77 changer transitions 0/266 dead transitions. [2024-06-21 20:03:53,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 266 transitions, 3919 flow [2024-06-21 20:03:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:53,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 20:03:53,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-21 20:03:53,048 INFO L175 Difference]: Start difference. First operand has 215 places, 252 transitions, 3273 flow. Second operand 6 states and 143 transitions. [2024-06-21 20:03:53,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 266 transitions, 3919 flow [2024-06-21 20:03:53,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 266 transitions, 3649 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:53,275 INFO L231 Difference]: Finished difference. Result has 215 places, 252 transitions, 3167 flow [2024-06-21 20:03:53,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3005, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3167, PETRI_PLACES=215, PETRI_TRANSITIONS=252} [2024-06-21 20:03:53,275 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2024-06-21 20:03:53,275 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 252 transitions, 3167 flow [2024-06-21 20:03:53,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:53,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:53,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:53,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:03:53,276 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:53,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:53,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1996344938, now seen corresponding path program 7 times [2024-06-21 20:03:53,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:53,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26123292] [2024-06-21 20:03:53,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:53,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:53,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:53,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26123292] [2024-06-21 20:03:53,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26123292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:53,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:53,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:53,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988890019] [2024-06-21 20:03:53,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:53,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:53,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:53,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:53,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:53,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:53,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 252 transitions, 3167 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:53,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:53,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:53,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:53,856 INFO L124 PetriNetUnfolderBase]: 1991/3374 cut-off events. [2024-06-21 20:03:53,856 INFO L125 PetriNetUnfolderBase]: For 107723/107726 co-relation queries the response was YES. [2024-06-21 20:03:53,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19831 conditions, 3374 events. 1991/3374 cut-off events. For 107723/107726 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20794 event pairs, 436 based on Foata normal form. 3/3372 useless extension candidates. Maximal degree in co-relation 19727. Up to 3016 conditions per place. [2024-06-21 20:03:53,888 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 209 selfloop transitions, 52 changer transitions 0/268 dead transitions. [2024-06-21 20:03:53,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 268 transitions, 3729 flow [2024-06-21 20:03:53,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:53,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 20:03:53,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-21 20:03:53,889 INFO L175 Difference]: Start difference. First operand has 215 places, 252 transitions, 3167 flow. Second operand 6 states and 143 transitions. [2024-06-21 20:03:53,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 268 transitions, 3729 flow [2024-06-21 20:03:54,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 268 transitions, 3545 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:54,114 INFO L231 Difference]: Finished difference. Result has 216 places, 252 transitions, 3101 flow [2024-06-21 20:03:54,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3101, PETRI_PLACES=216, PETRI_TRANSITIONS=252} [2024-06-21 20:03:54,114 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-21 20:03:54,115 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 252 transitions, 3101 flow [2024-06-21 20:03:54,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:54,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:54,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:54,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:03:54,115 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:54,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:54,115 INFO L85 PathProgramCache]: Analyzing trace with hash 299444468, now seen corresponding path program 8 times [2024-06-21 20:03:54,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:54,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024073868] [2024-06-21 20:03:54,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:54,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:54,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:54,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024073868] [2024-06-21 20:03:54,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024073868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:54,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:54,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:54,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53796654] [2024-06-21 20:03:54,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:54,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:54,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:54,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:54,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:54,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:54,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 252 transitions, 3101 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:54,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:54,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:54,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:54,650 INFO L124 PetriNetUnfolderBase]: 1985/3372 cut-off events. [2024-06-21 20:03:54,650 INFO L125 PetriNetUnfolderBase]: For 111285/111300 co-relation queries the response was YES. [2024-06-21 20:03:54,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19663 conditions, 3372 events. 1985/3372 cut-off events. For 111285/111300 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20889 event pairs, 461 based on Foata normal form. 14/3380 useless extension candidates. Maximal degree in co-relation 19558. Up to 2921 conditions per place. [2024-06-21 20:03:54,682 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 195 selfloop transitions, 66 changer transitions 0/268 dead transitions. [2024-06-21 20:03:54,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 268 transitions, 3759 flow [2024-06-21 20:03:54,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:54,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:54,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 20:03:54,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-21 20:03:54,683 INFO L175 Difference]: Start difference. First operand has 216 places, 252 transitions, 3101 flow. Second operand 5 states and 127 transitions. [2024-06-21 20:03:54,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 268 transitions, 3759 flow [2024-06-21 20:03:54,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 268 transitions, 3639 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 20:03:54,923 INFO L231 Difference]: Finished difference. Result has 216 places, 252 transitions, 3126 flow [2024-06-21 20:03:54,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2981, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3126, PETRI_PLACES=216, PETRI_TRANSITIONS=252} [2024-06-21 20:03:54,923 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-21 20:03:54,923 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 252 transitions, 3126 flow [2024-06-21 20:03:54,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:54,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:54,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:54,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:03:54,924 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:54,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:54,924 INFO L85 PathProgramCache]: Analyzing trace with hash 299207318, now seen corresponding path program 9 times [2024-06-21 20:03:54,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:54,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355606075] [2024-06-21 20:03:54,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:54,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:55,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:55,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355606075] [2024-06-21 20:03:55,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355606075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:55,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:55,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:55,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2437683] [2024-06-21 20:03:55,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:55,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:55,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:55,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:55,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:55,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:55,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 252 transitions, 3126 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:55,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:55,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:55,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:55,441 INFO L124 PetriNetUnfolderBase]: 1971/3346 cut-off events. [2024-06-21 20:03:55,441 INFO L125 PetriNetUnfolderBase]: For 111785/111788 co-relation queries the response was YES. [2024-06-21 20:03:55,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19468 conditions, 3346 events. 1971/3346 cut-off events. For 111785/111788 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20655 event pairs, 436 based on Foata normal form. 6/3347 useless extension candidates. Maximal degree in co-relation 19362. Up to 2908 conditions per place. [2024-06-21 20:03:55,474 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 187 selfloop transitions, 84 changer transitions 0/278 dead transitions. [2024-06-21 20:03:55,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 278 transitions, 3734 flow [2024-06-21 20:03:55,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:03:55,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:03:55,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:03:55,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 20:03:55,475 INFO L175 Difference]: Start difference. First operand has 216 places, 252 transitions, 3126 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:03:55,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 278 transitions, 3734 flow [2024-06-21 20:03:55,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 278 transitions, 3513 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 20:03:55,772 INFO L231 Difference]: Finished difference. Result has 217 places, 252 transitions, 3105 flow [2024-06-21 20:03:55,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2905, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3105, PETRI_PLACES=217, PETRI_TRANSITIONS=252} [2024-06-21 20:03:55,773 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 176 predicate places. [2024-06-21 20:03:55,773 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 252 transitions, 3105 flow [2024-06-21 20:03:55,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:55,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:55,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:55,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:03:55,773 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:55,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:55,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1982103572, now seen corresponding path program 1 times [2024-06-21 20:03:55,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:55,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494842309] [2024-06-21 20:03:55,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:55,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:55,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:55,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:55,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494842309] [2024-06-21 20:03:55,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494842309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:55,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:55,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:55,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301215729] [2024-06-21 20:03:55,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:55,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:55,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:55,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:55,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:55,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:55,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 252 transitions, 3105 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:55,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:55,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:55,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:56,268 INFO L124 PetriNetUnfolderBase]: 1925/3287 cut-off events. [2024-06-21 20:03:56,268 INFO L125 PetriNetUnfolderBase]: For 111748/111751 co-relation queries the response was YES. [2024-06-21 20:03:56,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19241 conditions, 3287 events. 1925/3287 cut-off events. For 111748/111751 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20460 event pairs, 414 based on Foata normal form. 7/3264 useless extension candidates. Maximal degree in co-relation 19135. Up to 2894 conditions per place. [2024-06-21 20:03:56,298 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 206 selfloop transitions, 43 changer transitions 0/270 dead transitions. [2024-06-21 20:03:56,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 270 transitions, 3671 flow [2024-06-21 20:03:56,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:56,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-21 20:03:56,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-21 20:03:56,299 INFO L175 Difference]: Start difference. First operand has 217 places, 252 transitions, 3105 flow. Second operand 5 states and 126 transitions. [2024-06-21 20:03:56,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 270 transitions, 3671 flow [2024-06-21 20:03:56,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 270 transitions, 3475 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 20:03:56,506 INFO L231 Difference]: Finished difference. Result has 214 places, 254 transitions, 3034 flow [2024-06-21 20:03:56,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2909, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3034, PETRI_PLACES=214, PETRI_TRANSITIONS=254} [2024-06-21 20:03:56,506 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-21 20:03:56,506 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 254 transitions, 3034 flow [2024-06-21 20:03:56,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:56,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:56,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:56,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:03:56,507 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:56,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:56,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1967818772, now seen corresponding path program 2 times [2024-06-21 20:03:56,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:56,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428303555] [2024-06-21 20:03:56,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:56,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:56,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:56,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428303555] [2024-06-21 20:03:56,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428303555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:56,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:56,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:56,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793112765] [2024-06-21 20:03:56,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:56,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:56,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:56,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:56,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:56,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:56,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 254 transitions, 3034 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:56,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:56,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:56,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:57,004 INFO L124 PetriNetUnfolderBase]: 1916/3274 cut-off events. [2024-06-21 20:03:57,004 INFO L125 PetriNetUnfolderBase]: For 97794/97818 co-relation queries the response was YES. [2024-06-21 20:03:57,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18641 conditions, 3274 events. 1916/3274 cut-off events. For 97794/97818 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20449 event pairs, 426 based on Foata normal form. 26/3264 useless extension candidates. Maximal degree in co-relation 18536. Up to 2842 conditions per place. [2024-06-21 20:03:57,034 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 211 selfloop transitions, 35 changer transitions 0/267 dead transitions. [2024-06-21 20:03:57,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 267 transitions, 3584 flow [2024-06-21 20:03:57,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-21 20:03:57,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-21 20:03:57,035 INFO L175 Difference]: Start difference. First operand has 214 places, 254 transitions, 3034 flow. Second operand 5 states and 119 transitions. [2024-06-21 20:03:57,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 267 transitions, 3584 flow [2024-06-21 20:03:57,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 267 transitions, 3479 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:57,261 INFO L231 Difference]: Finished difference. Result has 216 places, 256 transitions, 3040 flow [2024-06-21 20:03:57,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2929, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3040, PETRI_PLACES=216, PETRI_TRANSITIONS=256} [2024-06-21 20:03:57,261 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-21 20:03:57,262 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 256 transitions, 3040 flow [2024-06-21 20:03:57,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:57,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:57,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:57,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:03:57,262 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:57,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:57,262 INFO L85 PathProgramCache]: Analyzing trace with hash 2123672596, now seen corresponding path program 1 times [2024-06-21 20:03:57,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:57,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264952790] [2024-06-21 20:03:57,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:57,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:57,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:57,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264952790] [2024-06-21 20:03:57,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264952790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:57,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:57,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:57,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200049307] [2024-06-21 20:03:57,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:57,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:57,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:57,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:57,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:57,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:57,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 256 transitions, 3040 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:57,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:57,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:57,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:57,796 INFO L124 PetriNetUnfolderBase]: 1985/3370 cut-off events. [2024-06-21 20:03:57,796 INFO L125 PetriNetUnfolderBase]: For 97489/97492 co-relation queries the response was YES. [2024-06-21 20:03:57,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19203 conditions, 3370 events. 1985/3370 cut-off events. For 97489/97492 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20883 event pairs, 401 based on Foata normal form. 4/3371 useless extension candidates. Maximal degree in co-relation 19097. Up to 3057 conditions per place. [2024-06-21 20:03:57,826 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 249 selfloop transitions, 23 changer transitions 0/279 dead transitions. [2024-06-21 20:03:57,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 279 transitions, 3796 flow [2024-06-21 20:03:57,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:57,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:57,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 20:03:57,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 20:03:57,827 INFO L175 Difference]: Start difference. First operand has 216 places, 256 transitions, 3040 flow. Second operand 6 states and 140 transitions. [2024-06-21 20:03:57,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 279 transitions, 3796 flow [2024-06-21 20:03:58,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 279 transitions, 3701 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:58,081 INFO L231 Difference]: Finished difference. Result has 219 places, 260 transitions, 3072 flow [2024-06-21 20:03:58,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2945, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3072, PETRI_PLACES=219, PETRI_TRANSITIONS=260} [2024-06-21 20:03:58,082 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 178 predicate places. [2024-06-21 20:03:58,082 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 260 transitions, 3072 flow [2024-06-21 20:03:58,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:58,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:58,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:58,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:03:58,082 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:58,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:58,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2126529556, now seen corresponding path program 2 times [2024-06-21 20:03:58,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:58,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396937608] [2024-06-21 20:03:58,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:58,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:58,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:58,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396937608] [2024-06-21 20:03:58,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396937608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:58,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:58,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:58,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269896196] [2024-06-21 20:03:58,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:58,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:58,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:58,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:58,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:58,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:58,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 260 transitions, 3072 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:58,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:58,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:58,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:58,593 INFO L124 PetriNetUnfolderBase]: 1993/3382 cut-off events. [2024-06-21 20:03:58,593 INFO L125 PetriNetUnfolderBase]: For 101187/101190 co-relation queries the response was YES. [2024-06-21 20:03:58,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19304 conditions, 3382 events. 1993/3382 cut-off events. For 101187/101190 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20931 event pairs, 432 based on Foata normal form. 4/3383 useless extension candidates. Maximal degree in co-relation 19197. Up to 3100 conditions per place. [2024-06-21 20:03:58,626 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 249 selfloop transitions, 20 changer transitions 0/276 dead transitions. [2024-06-21 20:03:58,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 276 transitions, 3684 flow [2024-06-21 20:03:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:58,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:58,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-21 20:03:58,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-21 20:03:58,627 INFO L175 Difference]: Start difference. First operand has 219 places, 260 transitions, 3072 flow. Second operand 6 states and 135 transitions. [2024-06-21 20:03:58,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 276 transitions, 3684 flow [2024-06-21 20:03:58,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 276 transitions, 3605 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:58,905 INFO L231 Difference]: Finished difference. Result has 223 places, 262 transitions, 3082 flow [2024-06-21 20:03:58,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3007, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3082, PETRI_PLACES=223, PETRI_TRANSITIONS=262} [2024-06-21 20:03:58,906 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 182 predicate places. [2024-06-21 20:03:58,906 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 262 transitions, 3082 flow [2024-06-21 20:03:58,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:58,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:58,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:58,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:03:58,906 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:58,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:58,906 INFO L85 PathProgramCache]: Analyzing trace with hash 299453396, now seen corresponding path program 3 times [2024-06-21 20:03:58,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:58,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941317803] [2024-06-21 20:03:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:58,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:58,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:58,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941317803] [2024-06-21 20:03:58,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941317803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:58,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:58,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:03:58,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878786453] [2024-06-21 20:03:58,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:58,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:03:58,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:58,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:03:58,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:03:59,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:59,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 262 transitions, 3082 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:59,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:59,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:59,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:59,476 INFO L124 PetriNetUnfolderBase]: 1988/3375 cut-off events. [2024-06-21 20:03:59,476 INFO L125 PetriNetUnfolderBase]: For 102338/102341 co-relation queries the response was YES. [2024-06-21 20:03:59,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19181 conditions, 3375 events. 1988/3375 cut-off events. For 102338/102341 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20906 event pairs, 400 based on Foata normal form. 4/3376 useless extension candidates. Maximal degree in co-relation 19072. Up to 3078 conditions per place. [2024-06-21 20:03:59,503 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 252 selfloop transitions, 19 changer transitions 0/278 dead transitions. [2024-06-21 20:03:59,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 278 transitions, 3664 flow [2024-06-21 20:03:59,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:59,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-21 20:03:59,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-21 20:03:59,504 INFO L175 Difference]: Start difference. First operand has 223 places, 262 transitions, 3082 flow. Second operand 5 states and 121 transitions. [2024-06-21 20:03:59,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 278 transitions, 3664 flow [2024-06-21 20:03:59,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 278 transitions, 3593 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:59,745 INFO L231 Difference]: Finished difference. Result has 224 places, 262 transitions, 3057 flow [2024-06-21 20:03:59,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3011, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3057, PETRI_PLACES=224, PETRI_TRANSITIONS=262} [2024-06-21 20:03:59,745 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-21 20:03:59,745 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 262 transitions, 3057 flow [2024-06-21 20:03:59,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-21 20:03:59,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:59,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:59,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:03:59,746 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:59,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:59,746 INFO L85 PathProgramCache]: Analyzing trace with hash 842772394, now seen corresponding path program 1 times [2024-06-21 20:03:59,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:59,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388463629] [2024-06-21 20:03:59,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:59,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:59,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:59,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388463629] [2024-06-21 20:03:59,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388463629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:59,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:59,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:03:59,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698352906] [2024-06-21 20:03:59,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:59,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:03:59,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:59,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:03:59,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:03:59,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:59,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 262 transitions, 3057 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:59,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:59,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:59,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:00,278 INFO L124 PetriNetUnfolderBase]: 2017/3421 cut-off events. [2024-06-21 20:04:00,278 INFO L125 PetriNetUnfolderBase]: For 109130/109130 co-relation queries the response was YES. [2024-06-21 20:04:00,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19616 conditions, 3421 events. 2017/3421 cut-off events. For 109130/109130 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 21244 event pairs, 448 based on Foata normal form. 1/3408 useless extension candidates. Maximal degree in co-relation 19506. Up to 2696 conditions per place. [2024-06-21 20:04:00,310 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 158 selfloop transitions, 144 changer transitions 0/309 dead transitions. [2024-06-21 20:04:00,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 309 transitions, 4219 flow [2024-06-21 20:04:00,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:00,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 20:04:00,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-21 20:04:00,312 INFO L175 Difference]: Start difference. First operand has 224 places, 262 transitions, 3057 flow. Second operand 8 states and 204 transitions. [2024-06-21 20:04:00,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 309 transitions, 4219 flow [2024-06-21 20:04:00,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 309 transitions, 4174 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:00,529 INFO L231 Difference]: Finished difference. Result has 228 places, 276 transitions, 3490 flow [2024-06-21 20:04:00,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3012, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3490, PETRI_PLACES=228, PETRI_TRANSITIONS=276} [2024-06-21 20:04:00,530 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 187 predicate places. [2024-06-21 20:04:00,530 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 276 transitions, 3490 flow [2024-06-21 20:04:00,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:00,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:00,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:00,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:04:00,530 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:00,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:00,530 INFO L85 PathProgramCache]: Analyzing trace with hash -665124496, now seen corresponding path program 2 times [2024-06-21 20:04:00,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:00,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437605210] [2024-06-21 20:04:00,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:00,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:00,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:00,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437605210] [2024-06-21 20:04:00,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437605210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:00,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:00,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:00,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087898216] [2024-06-21 20:04:00,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:00,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:00,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:00,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:00,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:00,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:00,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 276 transitions, 3490 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:00,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:00,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:00,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:01,130 INFO L124 PetriNetUnfolderBase]: 2027/3441 cut-off events. [2024-06-21 20:04:01,130 INFO L125 PetriNetUnfolderBase]: For 115607/115610 co-relation queries the response was YES. [2024-06-21 20:04:01,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20589 conditions, 3441 events. 2027/3441 cut-off events. For 115607/115610 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 21390 event pairs, 437 based on Foata normal form. 3/3435 useless extension candidates. Maximal degree in co-relation 20478. Up to 2961 conditions per place. [2024-06-21 20:04:01,167 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 218 selfloop transitions, 85 changer transitions 0/310 dead transitions. [2024-06-21 20:04:01,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 310 transitions, 4344 flow [2024-06-21 20:04:01,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:01,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:04:01,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-21 20:04:01,169 INFO L175 Difference]: Start difference. First operand has 228 places, 276 transitions, 3490 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:04:01,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 310 transitions, 4344 flow [2024-06-21 20:04:01,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 310 transitions, 4085 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:01,448 INFO L231 Difference]: Finished difference. Result has 232 places, 282 transitions, 3489 flow [2024-06-21 20:04:01,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3489, PETRI_PLACES=232, PETRI_TRANSITIONS=282} [2024-06-21 20:04:01,449 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-21 20:04:01,449 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 282 transitions, 3489 flow [2024-06-21 20:04:01,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:01,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:01,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:01,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:04:01,450 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:01,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:01,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1958847604, now seen corresponding path program 1 times [2024-06-21 20:04:01,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:01,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977457501] [2024-06-21 20:04:01,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:01,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:01,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:01,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977457501] [2024-06-21 20:04:01,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977457501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:01,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:01,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:01,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129764958] [2024-06-21 20:04:01,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:01,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:01,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:01,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:01,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:01,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:01,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 282 transitions, 3489 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:01,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:01,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:01,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:02,048 INFO L124 PetriNetUnfolderBase]: 2032/3460 cut-off events. [2024-06-21 20:04:02,048 INFO L125 PetriNetUnfolderBase]: For 120088/120103 co-relation queries the response was YES. [2024-06-21 20:04:02,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20617 conditions, 3460 events. 2032/3460 cut-off events. For 120088/120103 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21606 event pairs, 458 based on Foata normal form. 13/3467 useless extension candidates. Maximal degree in co-relation 20505. Up to 2970 conditions per place. [2024-06-21 20:04:02,083 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 228 selfloop transitions, 72 changer transitions 0/307 dead transitions. [2024-06-21 20:04:02,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 307 transitions, 4392 flow [2024-06-21 20:04:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:02,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 20:04:02,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-21 20:04:02,084 INFO L175 Difference]: Start difference. First operand has 232 places, 282 transitions, 3489 flow. Second operand 7 states and 167 transitions. [2024-06-21 20:04:02,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 307 transitions, 4392 flow [2024-06-21 20:04:02,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 307 transitions, 4204 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:02,325 INFO L231 Difference]: Finished difference. Result has 234 places, 285 transitions, 3492 flow [2024-06-21 20:04:02,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3307, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3492, PETRI_PLACES=234, PETRI_TRANSITIONS=285} [2024-06-21 20:04:02,326 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-21 20:04:02,326 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 285 transitions, 3492 flow [2024-06-21 20:04:02,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:02,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:02,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:02,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:04:02,326 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:02,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:02,327 INFO L85 PathProgramCache]: Analyzing trace with hash 475028968, now seen corresponding path program 2 times [2024-06-21 20:04:02,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:02,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431663117] [2024-06-21 20:04:02,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:02,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:02,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:02,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431663117] [2024-06-21 20:04:02,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431663117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:02,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:02,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:02,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171445967] [2024-06-21 20:04:02,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:02,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:02,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:02,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:02,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:02,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:02,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 285 transitions, 3492 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:02,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:02,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:02,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:02,850 INFO L124 PetriNetUnfolderBase]: 2068/3518 cut-off events. [2024-06-21 20:04:02,850 INFO L125 PetriNetUnfolderBase]: For 126973/126988 co-relation queries the response was YES. [2024-06-21 20:04:02,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21112 conditions, 3518 events. 2068/3518 cut-off events. For 126973/126988 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 22022 event pairs, 458 based on Foata normal form. 13/3525 useless extension candidates. Maximal degree in co-relation 20999. Up to 3006 conditions per place. [2024-06-21 20:04:02,887 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 230 selfloop transitions, 86 changer transitions 0/323 dead transitions. [2024-06-21 20:04:02,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 323 transitions, 4720 flow [2024-06-21 20:04:02,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:02,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:02,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 20:04:02,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-21 20:04:02,888 INFO L175 Difference]: Start difference. First operand has 234 places, 285 transitions, 3492 flow. Second operand 7 states and 166 transitions. [2024-06-21 20:04:02,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 323 transitions, 4720 flow [2024-06-21 20:04:03,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 323 transitions, 4492 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:03,162 INFO L231 Difference]: Finished difference. Result has 237 places, 301 transitions, 3660 flow [2024-06-21 20:04:03,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3319, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3660, PETRI_PLACES=237, PETRI_TRANSITIONS=301} [2024-06-21 20:04:03,162 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-21 20:04:03,162 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 301 transitions, 3660 flow [2024-06-21 20:04:03,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:03,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:03,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:03,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:04:03,163 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:03,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:03,163 INFO L85 PathProgramCache]: Analyzing trace with hash 475266118, now seen corresponding path program 3 times [2024-06-21 20:04:03,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:03,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017899923] [2024-06-21 20:04:03,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:03,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:03,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:03,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:03,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017899923] [2024-06-21 20:04:03,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017899923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:03,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:03,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:03,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056347170] [2024-06-21 20:04:03,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:03,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:03,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:03,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:03,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:03,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:03,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 301 transitions, 3660 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:03,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:03,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:03,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:03,727 INFO L124 PetriNetUnfolderBase]: 2065/3512 cut-off events. [2024-06-21 20:04:03,727 INFO L125 PetriNetUnfolderBase]: For 129430/129445 co-relation queries the response was YES. [2024-06-21 20:04:03,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21038 conditions, 3512 events. 2065/3512 cut-off events. For 129430/129445 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 21974 event pairs, 458 based on Foata normal form. 13/3519 useless extension candidates. Maximal degree in co-relation 20924. Up to 3003 conditions per place. [2024-06-21 20:04:03,760 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 226 selfloop transitions, 89 changer transitions 0/322 dead transitions. [2024-06-21 20:04:03,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 322 transitions, 4574 flow [2024-06-21 20:04:03,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:03,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 20:04:03,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-21 20:04:03,761 INFO L175 Difference]: Start difference. First operand has 237 places, 301 transitions, 3660 flow. Second operand 7 states and 164 transitions. [2024-06-21 20:04:03,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 322 transitions, 4574 flow [2024-06-21 20:04:03,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 322 transitions, 4463 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-21 20:04:04,003 INFO L231 Difference]: Finished difference. Result has 243 places, 303 transitions, 3777 flow [2024-06-21 20:04:04,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3549, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3777, PETRI_PLACES=243, PETRI_TRANSITIONS=303} [2024-06-21 20:04:04,003 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 202 predicate places. [2024-06-21 20:04:04,003 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 303 transitions, 3777 flow [2024-06-21 20:04:04,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:04,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:04,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:04,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:04:04,004 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:04,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:04,004 INFO L85 PathProgramCache]: Analyzing trace with hash 302538892, now seen corresponding path program 3 times [2024-06-21 20:04:04,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:04,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663486193] [2024-06-21 20:04:04,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:04,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:04,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:04,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663486193] [2024-06-21 20:04:04,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663486193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:04,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:04,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:04,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133512596] [2024-06-21 20:04:04,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:04,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:04,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:04,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:04,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:04,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:04,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 303 transitions, 3777 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:04,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:04,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:04,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:04,604 INFO L124 PetriNetUnfolderBase]: 2078/3523 cut-off events. [2024-06-21 20:04:04,604 INFO L125 PetriNetUnfolderBase]: For 134868/134871 co-relation queries the response was YES. [2024-06-21 20:04:04,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21352 conditions, 3523 events. 2078/3523 cut-off events. For 134868/134871 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 21941 event pairs, 442 based on Foata normal form. 3/3516 useless extension candidates. Maximal degree in co-relation 21236. Up to 3009 conditions per place. [2024-06-21 20:04:04,638 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 216 selfloop transitions, 113 changer transitions 0/336 dead transitions. [2024-06-21 20:04:04,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 336 transitions, 4787 flow [2024-06-21 20:04:04,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:04,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:04,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-21 20:04:04,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-21 20:04:04,639 INFO L175 Difference]: Start difference. First operand has 243 places, 303 transitions, 3777 flow. Second operand 9 states and 209 transitions. [2024-06-21 20:04:04,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 336 transitions, 4787 flow [2024-06-21 20:04:04,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 336 transitions, 4648 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:04,912 INFO L231 Difference]: Finished difference. Result has 250 places, 309 transitions, 3957 flow [2024-06-21 20:04:04,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3638, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3957, PETRI_PLACES=250, PETRI_TRANSITIONS=309} [2024-06-21 20:04:04,913 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-21 20:04:04,913 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 309 transitions, 3957 flow [2024-06-21 20:04:04,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:04,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:04,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:04,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:04:04,913 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:04,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:04,913 INFO L85 PathProgramCache]: Analyzing trace with hash 754234534, now seen corresponding path program 1 times [2024-06-21 20:04:04,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:04,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570246734] [2024-06-21 20:04:04,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:04,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:04,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:04,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570246734] [2024-06-21 20:04:04,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570246734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:04,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:04,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:04,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894632231] [2024-06-21 20:04:04,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:04,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:04,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:04,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:04,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:05,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:05,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 309 transitions, 3957 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:05,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:05,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:05,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:05,493 INFO L124 PetriNetUnfolderBase]: 2139/3624 cut-off events. [2024-06-21 20:04:05,493 INFO L125 PetriNetUnfolderBase]: For 157377/157389 co-relation queries the response was YES. [2024-06-21 20:04:05,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22230 conditions, 3624 events. 2139/3624 cut-off events. For 157377/157389 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22614 event pairs, 364 based on Foata normal form. 16/3637 useless extension candidates. Maximal degree in co-relation 22112. Up to 3117 conditions per place. [2024-06-21 20:04:05,530 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 303 selfloop transitions, 35 changer transitions 0/345 dead transitions. [2024-06-21 20:04:05,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 345 transitions, 4919 flow [2024-06-21 20:04:05,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:05,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:05,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 20:04:05,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-21 20:04:05,531 INFO L175 Difference]: Start difference. First operand has 250 places, 309 transitions, 3957 flow. Second operand 7 states and 167 transitions. [2024-06-21 20:04:05,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 345 transitions, 4919 flow [2024-06-21 20:04:05,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 345 transitions, 4666 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 20:04:05,816 INFO L231 Difference]: Finished difference. Result has 251 places, 314 transitions, 3853 flow [2024-06-21 20:04:05,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3704, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3853, PETRI_PLACES=251, PETRI_TRANSITIONS=314} [2024-06-21 20:04:05,817 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 210 predicate places. [2024-06-21 20:04:05,817 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 314 transitions, 3853 flow [2024-06-21 20:04:05,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:05,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:05,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:05,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:04:05,818 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:05,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:05,818 INFO L85 PathProgramCache]: Analyzing trace with hash 474936712, now seen corresponding path program 2 times [2024-06-21 20:04:05,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:05,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680759284] [2024-06-21 20:04:05,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:05,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:05,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:05,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680759284] [2024-06-21 20:04:05,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680759284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:05,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:05,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:05,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190551029] [2024-06-21 20:04:05,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:05,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:05,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:05,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:05,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:05,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:05,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 314 transitions, 3853 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:05,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:05,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:05,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:06,399 INFO L124 PetriNetUnfolderBase]: 2213/3738 cut-off events. [2024-06-21 20:04:06,400 INFO L125 PetriNetUnfolderBase]: For 176216/176228 co-relation queries the response was YES. [2024-06-21 20:04:06,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23178 conditions, 3738 events. 2213/3738 cut-off events. For 176216/176228 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 23445 event pairs, 463 based on Foata normal form. 16/3751 useless extension candidates. Maximal degree in co-relation 23060. Up to 3315 conditions per place. [2024-06-21 20:04:06,439 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 305 selfloop transitions, 33 changer transitions 0/345 dead transitions. [2024-06-21 20:04:06,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 345 transitions, 4797 flow [2024-06-21 20:04:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:06,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:06,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 20:04:06,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-21 20:04:06,440 INFO L175 Difference]: Start difference. First operand has 251 places, 314 transitions, 3853 flow. Second operand 7 states and 164 transitions. [2024-06-21 20:04:06,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 345 transitions, 4797 flow [2024-06-21 20:04:06,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 345 transitions, 4755 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-21 20:04:06,766 INFO L231 Difference]: Finished difference. Result has 257 places, 318 transitions, 3935 flow [2024-06-21 20:04:06,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3811, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3935, PETRI_PLACES=257, PETRI_TRANSITIONS=318} [2024-06-21 20:04:06,767 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 216 predicate places. [2024-06-21 20:04:06,767 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 318 transitions, 3935 flow [2024-06-21 20:04:06,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:06,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:06,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:06,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 20:04:06,767 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:06,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:06,768 INFO L85 PathProgramCache]: Analyzing trace with hash 475263142, now seen corresponding path program 3 times [2024-06-21 20:04:06,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:06,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066383104] [2024-06-21 20:04:06,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:06,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:06,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:06,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066383104] [2024-06-21 20:04:06,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066383104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:06,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:06,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:06,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813872151] [2024-06-21 20:04:06,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:06,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:06,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:06,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:06,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:06,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:06,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 318 transitions, 3935 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:06,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:06,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:06,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:07,378 INFO L124 PetriNetUnfolderBase]: 2195/3712 cut-off events. [2024-06-21 20:04:07,379 INFO L125 PetriNetUnfolderBase]: For 171881/171893 co-relation queries the response was YES. [2024-06-21 20:04:07,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22873 conditions, 3712 events. 2195/3712 cut-off events. For 171881/171893 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 23297 event pairs, 461 based on Foata normal form. 18/3727 useless extension candidates. Maximal degree in co-relation 22752. Up to 3337 conditions per place. [2024-06-21 20:04:07,417 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 303 selfloop transitions, 31 changer transitions 0/341 dead transitions. [2024-06-21 20:04:07,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 341 transitions, 4697 flow [2024-06-21 20:04:07,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:07,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:07,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-21 20:04:07,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 20:04:07,418 INFO L175 Difference]: Start difference. First operand has 257 places, 318 transitions, 3935 flow. Second operand 7 states and 160 transitions. [2024-06-21 20:04:07,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 341 transitions, 4697 flow [2024-06-21 20:04:07,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 341 transitions, 4657 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:07,817 INFO L231 Difference]: Finished difference. Result has 261 places, 318 transitions, 3962 flow [2024-06-21 20:04:07,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3895, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3962, PETRI_PLACES=261, PETRI_TRANSITIONS=318} [2024-06-21 20:04:07,817 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-21 20:04:07,817 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 318 transitions, 3962 flow [2024-06-21 20:04:07,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:07,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:07,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:07,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 20:04:07,818 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:07,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:07,818 INFO L85 PathProgramCache]: Analyzing trace with hash -417801354, now seen corresponding path program 4 times [2024-06-21 20:04:07,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:07,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416908129] [2024-06-21 20:04:07,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:07,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:07,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:07,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416908129] [2024-06-21 20:04:07,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416908129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:07,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:07,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:07,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82702296] [2024-06-21 20:04:07,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:07,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:07,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:07,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:07,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:07,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:07,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 318 transitions, 3962 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:07,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:07,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:07,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:08,486 INFO L124 PetriNetUnfolderBase]: 2240/3778 cut-off events. [2024-06-21 20:04:08,486 INFO L125 PetriNetUnfolderBase]: For 173285/173285 co-relation queries the response was YES. [2024-06-21 20:04:08,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23709 conditions, 3778 events. 2240/3778 cut-off events. For 173285/173285 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 23735 event pairs, 472 based on Foata normal form. 1/3770 useless extension candidates. Maximal degree in co-relation 23586. Up to 3204 conditions per place. [2024-06-21 20:04:08,525 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 238 selfloop transitions, 124 changer transitions 0/369 dead transitions. [2024-06-21 20:04:08,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 369 transitions, 5178 flow [2024-06-21 20:04:08,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:04:08,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:04:08,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-21 20:04:08,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075 [2024-06-21 20:04:08,526 INFO L175 Difference]: Start difference. First operand has 261 places, 318 transitions, 3962 flow. Second operand 10 states and 243 transitions. [2024-06-21 20:04:08,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 369 transitions, 5178 flow [2024-06-21 20:04:08,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 369 transitions, 5137 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:08,948 INFO L231 Difference]: Finished difference. Result has 269 places, 332 transitions, 4365 flow [2024-06-21 20:04:08,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3921, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4365, PETRI_PLACES=269, PETRI_TRANSITIONS=332} [2024-06-21 20:04:08,949 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 228 predicate places. [2024-06-21 20:04:08,949 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 332 transitions, 4365 flow [2024-06-21 20:04:08,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:08,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:08,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:08,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 20:04:08,950 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:08,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:08,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1380524582, now seen corresponding path program 5 times [2024-06-21 20:04:08,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:08,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586008954] [2024-06-21 20:04:08,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:08,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:09,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:09,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586008954] [2024-06-21 20:04:09,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586008954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:09,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:09,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:09,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534366396] [2024-06-21 20:04:09,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:09,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:09,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:09,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:09,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:09,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:09,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 332 transitions, 4365 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:09,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:09,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:09,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:09,621 INFO L124 PetriNetUnfolderBase]: 2253/3798 cut-off events. [2024-06-21 20:04:09,621 INFO L125 PetriNetUnfolderBase]: For 181448/181448 co-relation queries the response was YES. [2024-06-21 20:04:09,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24357 conditions, 3798 events. 2253/3798 cut-off events. For 181448/181448 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 23867 event pairs, 472 based on Foata normal form. 1/3790 useless extension candidates. Maximal degree in co-relation 24232. Up to 3219 conditions per place. [2024-06-21 20:04:09,664 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 234 selfloop transitions, 132 changer transitions 0/373 dead transitions. [2024-06-21 20:04:09,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 373 transitions, 5518 flow [2024-06-21 20:04:09,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:04:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:04:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-21 20:04:09,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2024-06-21 20:04:09,665 INFO L175 Difference]: Start difference. First operand has 269 places, 332 transitions, 4365 flow. Second operand 11 states and 256 transitions. [2024-06-21 20:04:09,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 373 transitions, 5518 flow [2024-06-21 20:04:10,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 373 transitions, 5293 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:10,101 INFO L231 Difference]: Finished difference. Result has 275 places, 338 transitions, 4505 flow [2024-06-21 20:04:10,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4162, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4505, PETRI_PLACES=275, PETRI_TRANSITIONS=338} [2024-06-21 20:04:10,102 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 234 predicate places. [2024-06-21 20:04:10,102 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 338 transitions, 4505 flow [2024-06-21 20:04:10,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:10,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:10,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:10,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 20:04:10,102 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:10,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:10,103 INFO L85 PathProgramCache]: Analyzing trace with hash 121831368, now seen corresponding path program 6 times [2024-06-21 20:04:10,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:10,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124145955] [2024-06-21 20:04:10,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:10,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:10,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:10,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124145955] [2024-06-21 20:04:10,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124145955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:10,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:10,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:10,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409630030] [2024-06-21 20:04:10,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:10,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:10,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:10,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:10,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:10,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:10,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 338 transitions, 4505 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:10,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:10,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:10,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:10,830 INFO L124 PetriNetUnfolderBase]: 2250/3796 cut-off events. [2024-06-21 20:04:10,831 INFO L125 PetriNetUnfolderBase]: For 184779/184779 co-relation queries the response was YES. [2024-06-21 20:04:10,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24544 conditions, 3796 events. 2250/3796 cut-off events. For 184779/184779 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 23885 event pairs, 472 based on Foata normal form. 1/3788 useless extension candidates. Maximal degree in co-relation 24417. Up to 3216 conditions per place. [2024-06-21 20:04:10,867 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 234 selfloop transitions, 126 changer transitions 0/367 dead transitions. [2024-06-21 20:04:10,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 367 transitions, 5541 flow [2024-06-21 20:04:10,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:10,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:10,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 20:04:10,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621875 [2024-06-21 20:04:10,868 INFO L175 Difference]: Start difference. First operand has 275 places, 338 transitions, 4505 flow. Second operand 8 states and 199 transitions. [2024-06-21 20:04:10,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 367 transitions, 5541 flow [2024-06-21 20:04:11,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 367 transitions, 5279 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:11,307 INFO L231 Difference]: Finished difference. Result has 276 places, 338 transitions, 4501 flow [2024-06-21 20:04:11,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4243, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4501, PETRI_PLACES=276, PETRI_TRANSITIONS=338} [2024-06-21 20:04:11,308 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-21 20:04:11,308 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 338 transitions, 4501 flow [2024-06-21 20:04:11,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:11,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:11,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:11,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 20:04:11,308 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:11,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:11,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1386065336, now seen corresponding path program 4 times [2024-06-21 20:04:11,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:11,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998808594] [2024-06-21 20:04:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:11,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:11,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:11,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998808594] [2024-06-21 20:04:11,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998808594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:11,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:11,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:11,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468085315] [2024-06-21 20:04:11,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:11,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:11,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:11,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:11,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:11,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:11,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 338 transitions, 4501 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:11,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:11,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:11,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:11,939 INFO L124 PetriNetUnfolderBase]: 2247/3799 cut-off events. [2024-06-21 20:04:11,939 INFO L125 PetriNetUnfolderBase]: For 189726/189741 co-relation queries the response was YES. [2024-06-21 20:04:11,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24544 conditions, 3799 events. 2247/3799 cut-off events. For 189726/189741 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 23991 event pairs, 485 based on Foata normal form. 13/3806 useless extension candidates. Maximal degree in co-relation 24416. Up to 3315 conditions per place. [2024-06-21 20:04:11,981 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 278 selfloop transitions, 70 changer transitions 0/355 dead transitions. [2024-06-21 20:04:11,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 355 transitions, 5363 flow [2024-06-21 20:04:11,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:11,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:11,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 20:04:11,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-21 20:04:11,982 INFO L175 Difference]: Start difference. First operand has 276 places, 338 transitions, 4501 flow. Second operand 6 states and 145 transitions. [2024-06-21 20:04:11,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 355 transitions, 5363 flow [2024-06-21 20:04:12,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 355 transitions, 5103 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:12,464 INFO L231 Difference]: Finished difference. Result has 275 places, 338 transitions, 4392 flow [2024-06-21 20:04:12,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4241, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4392, PETRI_PLACES=275, PETRI_TRANSITIONS=338} [2024-06-21 20:04:12,464 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 234 predicate places. [2024-06-21 20:04:12,464 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 338 transitions, 4392 flow [2024-06-21 20:04:12,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:12,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:12,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:12,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 20:04:12,465 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:12,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:12,465 INFO L85 PathProgramCache]: Analyzing trace with hash 278460364, now seen corresponding path program 7 times [2024-06-21 20:04:12,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:12,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284059049] [2024-06-21 20:04:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:12,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:12,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:12,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284059049] [2024-06-21 20:04:12,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284059049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:12,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:12,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:12,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552648780] [2024-06-21 20:04:12,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:12,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:12,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:12,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:12,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:12,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:12,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 338 transitions, 4392 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:12,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:12,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:12,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:13,227 INFO L124 PetriNetUnfolderBase]: 2244/3789 cut-off events. [2024-06-21 20:04:13,228 INFO L125 PetriNetUnfolderBase]: For 191723/191726 co-relation queries the response was YES. [2024-06-21 20:04:13,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24374 conditions, 3789 events. 2244/3789 cut-off events. For 191723/191726 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 23857 event pairs, 460 based on Foata normal form. 3/3787 useless extension candidates. Maximal degree in co-relation 24245. Up to 3376 conditions per place. [2024-06-21 20:04:13,267 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 298 selfloop transitions, 57 changer transitions 0/362 dead transitions. [2024-06-21 20:04:13,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 362 transitions, 5162 flow [2024-06-21 20:04:13,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:13,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:13,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 20:04:13,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 20:04:13,268 INFO L175 Difference]: Start difference. First operand has 275 places, 338 transitions, 4392 flow. Second operand 8 states and 188 transitions. [2024-06-21 20:04:13,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 362 transitions, 5162 flow [2024-06-21 20:04:13,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 362 transitions, 5028 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:13,721 INFO L231 Difference]: Finished difference. Result has 278 places, 338 transitions, 4378 flow [2024-06-21 20:04:13,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4258, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4378, PETRI_PLACES=278, PETRI_TRANSITIONS=338} [2024-06-21 20:04:13,722 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 237 predicate places. [2024-06-21 20:04:13,722 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 338 transitions, 4378 flow [2024-06-21 20:04:13,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:13,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:13,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:13,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 20:04:13,722 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:13,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:13,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1371734408, now seen corresponding path program 5 times [2024-06-21 20:04:13,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:13,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523151991] [2024-06-21 20:04:13,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:13,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:13,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:13,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523151991] [2024-06-21 20:04:13,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523151991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:13,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:13,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:13,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818751948] [2024-06-21 20:04:13,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:13,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:13,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:13,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:13,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:13,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:13,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 338 transitions, 4378 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:13,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:13,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:13,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:14,405 INFO L124 PetriNetUnfolderBase]: 2249/3804 cut-off events. [2024-06-21 20:04:14,406 INFO L125 PetriNetUnfolderBase]: For 198543/198558 co-relation queries the response was YES. [2024-06-21 20:04:14,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24501 conditions, 3804 events. 2249/3804 cut-off events. For 198543/198558 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24033 event pairs, 481 based on Foata normal form. 13/3811 useless extension candidates. Maximal degree in co-relation 24371. Up to 3317 conditions per place. [2024-06-21 20:04:14,447 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 268 selfloop transitions, 84 changer transitions 0/359 dead transitions. [2024-06-21 20:04:14,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 359 transitions, 5288 flow [2024-06-21 20:04:14,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:14,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 20:04:14,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-21 20:04:14,448 INFO L175 Difference]: Start difference. First operand has 278 places, 338 transitions, 4378 flow. Second operand 7 states and 165 transitions. [2024-06-21 20:04:14,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 359 transitions, 5288 flow [2024-06-21 20:04:14,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 359 transitions, 5170 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:14,969 INFO L231 Difference]: Finished difference. Result has 280 places, 341 transitions, 4472 flow [2024-06-21 20:04:14,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4472, PETRI_PLACES=280, PETRI_TRANSITIONS=341} [2024-06-21 20:04:14,970 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-21 20:04:14,970 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 341 transitions, 4472 flow [2024-06-21 20:04:14,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:14,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:14,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:14,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 20:04:14,971 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:14,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:14,971 INFO L85 PathProgramCache]: Analyzing trace with hash 917794630, now seen corresponding path program 6 times [2024-06-21 20:04:14,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:14,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907892751] [2024-06-21 20:04:14,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:14,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:15,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:15,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907892751] [2024-06-21 20:04:15,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907892751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:15,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:15,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:15,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170135136] [2024-06-21 20:04:15,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:15,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:15,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:15,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:15,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:15,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:15,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 341 transitions, 4472 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:15,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:15,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:15,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:15,616 INFO L124 PetriNetUnfolderBase]: 2246/3800 cut-off events. [2024-06-21 20:04:15,616 INFO L125 PetriNetUnfolderBase]: For 202371/202386 co-relation queries the response was YES. [2024-06-21 20:04:15,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24573 conditions, 3800 events. 2246/3800 cut-off events. For 202371/202386 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24025 event pairs, 485 based on Foata normal form. 13/3807 useless extension candidates. Maximal degree in co-relation 24442. Up to 3314 conditions per place. [2024-06-21 20:04:15,661 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 276 selfloop transitions, 73 changer transitions 0/356 dead transitions. [2024-06-21 20:04:15,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 356 transitions, 5208 flow [2024-06-21 20:04:15,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:04:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:04:15,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-21 20:04:15,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:04:15,662 INFO L175 Difference]: Start difference. First operand has 280 places, 341 transitions, 4472 flow. Second operand 5 states and 125 transitions. [2024-06-21 20:04:15,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 356 transitions, 5208 flow [2024-06-21 20:04:16,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 356 transitions, 5030 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:16,144 INFO L231 Difference]: Finished difference. Result has 279 places, 341 transitions, 4460 flow [2024-06-21 20:04:16,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4294, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4460, PETRI_PLACES=279, PETRI_TRANSITIONS=341} [2024-06-21 20:04:16,145 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2024-06-21 20:04:16,145 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 341 transitions, 4460 flow [2024-06-21 20:04:16,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:16,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:16,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:16,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 20:04:16,145 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:16,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:16,145 INFO L85 PathProgramCache]: Analyzing trace with hash 917800024, now seen corresponding path program 8 times [2024-06-21 20:04:16,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:16,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511678483] [2024-06-21 20:04:16,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:16,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:16,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:16,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511678483] [2024-06-21 20:04:16,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511678483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:16,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:16,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:16,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342680138] [2024-06-21 20:04:16,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:16,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:16,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:16,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:16,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:16,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:16,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 341 transitions, 4460 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:16,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:16,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:16,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:16,849 INFO L124 PetriNetUnfolderBase]: 2264/3825 cut-off events. [2024-06-21 20:04:16,849 INFO L125 PetriNetUnfolderBase]: For 203591/203594 co-relation queries the response was YES. [2024-06-21 20:04:16,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24811 conditions, 3825 events. 2264/3825 cut-off events. For 203591/203594 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 24098 event pairs, 460 based on Foata normal form. 3/3823 useless extension candidates. Maximal degree in co-relation 24680. Up to 3393 conditions per place. [2024-06-21 20:04:16,892 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 300 selfloop transitions, 70 changer transitions 0/377 dead transitions. [2024-06-21 20:04:16,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 377 transitions, 5529 flow [2024-06-21 20:04:16,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:04:16,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:04:16,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-21 20:04:16,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-06-21 20:04:16,893 INFO L175 Difference]: Start difference. First operand has 279 places, 341 transitions, 4460 flow. Second operand 10 states and 226 transitions. [2024-06-21 20:04:16,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 377 transitions, 5529 flow [2024-06-21 20:04:17,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 377 transitions, 5352 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:17,407 INFO L231 Difference]: Finished difference. Result has 284 places, 350 transitions, 4590 flow [2024-06-21 20:04:17,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4293, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4590, PETRI_PLACES=284, PETRI_TRANSITIONS=350} [2024-06-21 20:04:17,407 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-21 20:04:17,407 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 350 transitions, 4590 flow [2024-06-21 20:04:17,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:17,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:17,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:17,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 20:04:17,407 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:17,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:17,408 INFO L85 PathProgramCache]: Analyzing trace with hash 131205768, now seen corresponding path program 9 times [2024-06-21 20:04:17,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:17,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405074120] [2024-06-21 20:04:17,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:17,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:17,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:17,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:17,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405074120] [2024-06-21 20:04:17,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405074120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:17,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:17,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:17,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732947831] [2024-06-21 20:04:17,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:17,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:17,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:17,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:17,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:17,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:17,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 350 transitions, 4590 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:17,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:17,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:17,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:18,110 INFO L124 PetriNetUnfolderBase]: 2261/3821 cut-off events. [2024-06-21 20:04:18,110 INFO L125 PetriNetUnfolderBase]: For 195512/195515 co-relation queries the response was YES. [2024-06-21 20:04:18,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24643 conditions, 3821 events. 2261/3821 cut-off events. For 195512/195515 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 24116 event pairs, 460 based on Foata normal form. 3/3819 useless extension candidates. Maximal degree in co-relation 24512. Up to 3390 conditions per place. [2024-06-21 20:04:18,154 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 301 selfloop transitions, 70 changer transitions 0/378 dead transitions. [2024-06-21 20:04:18,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 378 transitions, 5400 flow [2024-06-21 20:04:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:04:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:04:18,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-06-21 20:04:18,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-21 20:04:18,155 INFO L175 Difference]: Start difference. First operand has 284 places, 350 transitions, 4590 flow. Second operand 12 states and 261 transitions. [2024-06-21 20:04:18,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 378 transitions, 5400 flow [2024-06-21 20:04:18,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 378 transitions, 5262 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:18,691 INFO L231 Difference]: Finished difference. Result has 291 places, 350 transitions, 4598 flow [2024-06-21 20:04:18,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4452, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4598, PETRI_PLACES=291, PETRI_TRANSITIONS=350} [2024-06-21 20:04:18,691 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 250 predicate places. [2024-06-21 20:04:18,691 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 350 transitions, 4598 flow [2024-06-21 20:04:18,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:18,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:18,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:18,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 20:04:18,692 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:18,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:18,692 INFO L85 PathProgramCache]: Analyzing trace with hash -184183002, now seen corresponding path program 7 times [2024-06-21 20:04:18,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:18,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935963328] [2024-06-21 20:04:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:18,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:18,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:18,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935963328] [2024-06-21 20:04:18,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935963328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:18,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:18,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:18,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133660154] [2024-06-21 20:04:18,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:18,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:18,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:18,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:18,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:18,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:18,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 350 transitions, 4598 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:18,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:18,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:18,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:19,297 INFO L124 PetriNetUnfolderBase]: 2274/3847 cut-off events. [2024-06-21 20:04:19,297 INFO L125 PetriNetUnfolderBase]: For 204621/204636 co-relation queries the response was YES. [2024-06-21 20:04:19,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24880 conditions, 3847 events. 2274/3847 cut-off events. For 204621/204636 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 24367 event pairs, 485 based on Foata normal form. 13/3854 useless extension candidates. Maximal degree in co-relation 24748. Up to 3309 conditions per place. [2024-06-21 20:04:19,423 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 265 selfloop transitions, 102 changer transitions 0/374 dead transitions. [2024-06-21 20:04:19,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 374 transitions, 5690 flow [2024-06-21 20:04:19,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:19,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 20:04:19,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-21 20:04:19,424 INFO L175 Difference]: Start difference. First operand has 291 places, 350 transitions, 4598 flow. Second operand 6 states and 145 transitions. [2024-06-21 20:04:19,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 374 transitions, 5690 flow [2024-06-21 20:04:19,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 374 transitions, 5518 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 20:04:19,960 INFO L231 Difference]: Finished difference. Result has 285 places, 356 transitions, 4694 flow [2024-06-21 20:04:19,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4426, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4694, PETRI_PLACES=285, PETRI_TRANSITIONS=356} [2024-06-21 20:04:19,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-21 20:04:19,961 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 356 transitions, 4694 flow [2024-06-21 20:04:19,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:19,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:19,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:19,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 20:04:19,961 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:19,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:19,962 INFO L85 PathProgramCache]: Analyzing trace with hash 698480984, now seen corresponding path program 10 times [2024-06-21 20:04:19,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:19,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365094633] [2024-06-21 20:04:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:19,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:20,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:20,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365094633] [2024-06-21 20:04:20,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365094633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:20,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:20,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:20,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996825478] [2024-06-21 20:04:20,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:20,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:20,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:20,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:20,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:20,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:20,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 356 transitions, 4694 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:20,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:20,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:20,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:20,677 INFO L124 PetriNetUnfolderBase]: 2292/3872 cut-off events. [2024-06-21 20:04:20,677 INFO L125 PetriNetUnfolderBase]: For 212007/212010 co-relation queries the response was YES. [2024-06-21 20:04:20,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25300 conditions, 3872 events. 2292/3872 cut-off events. For 212007/212010 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 24517 event pairs, 460 based on Foata normal form. 3/3870 useless extension candidates. Maximal degree in co-relation 25167. Up to 3449 conditions per place. [2024-06-21 20:04:20,720 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 318 selfloop transitions, 62 changer transitions 0/387 dead transitions. [2024-06-21 20:04:20,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 387 transitions, 5783 flow [2024-06-21 20:04:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:04:20,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:04:20,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-21 20:04:20,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5318181818181819 [2024-06-21 20:04:20,721 INFO L175 Difference]: Start difference. First operand has 285 places, 356 transitions, 4694 flow. Second operand 11 states and 234 transitions. [2024-06-21 20:04:20,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 387 transitions, 5783 flow [2024-06-21 20:04:21,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 387 transitions, 5665 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:21,263 INFO L231 Difference]: Finished difference. Result has 295 places, 365 transitions, 4879 flow [2024-06-21 20:04:21,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4580, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4879, PETRI_PLACES=295, PETRI_TRANSITIONS=365} [2024-06-21 20:04:21,264 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 254 predicate places. [2024-06-21 20:04:21,264 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 365 transitions, 4879 flow [2024-06-21 20:04:21,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:21,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:21,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:21,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 20:04:21,264 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:21,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:21,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1327315592, now seen corresponding path program 11 times [2024-06-21 20:04:21,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:21,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290100400] [2024-06-21 20:04:21,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:21,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:21,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:21,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290100400] [2024-06-21 20:04:21,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290100400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:21,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:21,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:21,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961531059] [2024-06-21 20:04:21,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:21,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:21,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:21,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:21,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:21,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:21,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 365 transitions, 4879 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:21,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:21,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:21,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:22,027 INFO L124 PetriNetUnfolderBase]: 2289/3868 cut-off events. [2024-06-21 20:04:22,028 INFO L125 PetriNetUnfolderBase]: For 210057/210060 co-relation queries the response was YES. [2024-06-21 20:04:22,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25205 conditions, 3868 events. 2289/3868 cut-off events. For 210057/210060 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 24509 event pairs, 460 based on Foata normal form. 3/3866 useless extension candidates. Maximal degree in co-relation 25070. Up to 3446 conditions per place. [2024-06-21 20:04:22,073 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 316 selfloop transitions, 62 changer transitions 0/385 dead transitions. [2024-06-21 20:04:22,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 385 transitions, 5683 flow [2024-06-21 20:04:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:04:22,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:04:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-21 20:04:22,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-21 20:04:22,074 INFO L175 Difference]: Start difference. First operand has 295 places, 365 transitions, 4879 flow. Second operand 10 states and 216 transitions. [2024-06-21 20:04:22,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 385 transitions, 5683 flow [2024-06-21 20:04:22,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 385 transitions, 5521 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:22,526 INFO L231 Difference]: Finished difference. Result has 298 places, 365 transitions, 4847 flow [2024-06-21 20:04:22,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4717, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4847, PETRI_PLACES=298, PETRI_TRANSITIONS=365} [2024-06-21 20:04:22,526 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 257 predicate places. [2024-06-21 20:04:22,526 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 365 transitions, 4847 flow [2024-06-21 20:04:22,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:22,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:22,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:22,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 20:04:22,527 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:22,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:22,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1387422042, now seen corresponding path program 12 times [2024-06-21 20:04:22,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:22,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218413442] [2024-06-21 20:04:22,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:22,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:22,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:22,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:22,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218413442] [2024-06-21 20:04:22,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218413442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:22,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:22,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:22,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857895804] [2024-06-21 20:04:22,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:22,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:22,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:22,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:22,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:22,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:22,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 365 transitions, 4847 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:22,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:22,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:22,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:23,224 INFO L124 PetriNetUnfolderBase]: 2317/3908 cut-off events. [2024-06-21 20:04:23,224 INFO L125 PetriNetUnfolderBase]: For 218832/218835 co-relation queries the response was YES. [2024-06-21 20:04:23,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25622 conditions, 3908 events. 2317/3908 cut-off events. For 218832/218835 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 24769 event pairs, 472 based on Foata normal form. 3/3899 useless extension candidates. Maximal degree in co-relation 25486. Up to 3312 conditions per place. [2024-06-21 20:04:23,269 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 234 selfloop transitions, 162 changer transitions 0/403 dead transitions. [2024-06-21 20:04:23,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 403 transitions, 6333 flow [2024-06-21 20:04:23,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:04:23,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:04:23,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-21 20:04:23,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2024-06-21 20:04:23,271 INFO L175 Difference]: Start difference. First operand has 298 places, 365 transitions, 4847 flow. Second operand 10 states and 223 transitions. [2024-06-21 20:04:23,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 403 transitions, 6333 flow [2024-06-21 20:04:23,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 403 transitions, 6209 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 20:04:23,914 INFO L231 Difference]: Finished difference. Result has 301 places, 380 transitions, 5342 flow [2024-06-21 20:04:23,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4723, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5342, PETRI_PLACES=301, PETRI_TRANSITIONS=380} [2024-06-21 20:04:23,914 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 260 predicate places. [2024-06-21 20:04:23,914 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 380 transitions, 5342 flow [2024-06-21 20:04:23,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:23,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:23,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:23,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 20:04:23,915 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:23,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:23,915 INFO L85 PathProgramCache]: Analyzing trace with hash 118364574, now seen corresponding path program 8 times [2024-06-21 20:04:23,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:23,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120757078] [2024-06-21 20:04:23,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:23,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:23,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:23,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120757078] [2024-06-21 20:04:23,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120757078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:23,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:23,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:23,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020489240] [2024-06-21 20:04:23,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:23,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:23,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:23,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:23,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:24,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:24,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 380 transitions, 5342 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:24,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:24,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:24,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:24,553 INFO L124 PetriNetUnfolderBase]: 2314/3917 cut-off events. [2024-06-21 20:04:24,553 INFO L125 PetriNetUnfolderBase]: For 224597/224612 co-relation queries the response was YES. [2024-06-21 20:04:24,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25966 conditions, 3917 events. 2314/3917 cut-off events. For 224597/224612 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24965 event pairs, 485 based on Foata normal form. 13/3924 useless extension candidates. Maximal degree in co-relation 25827. Up to 3352 conditions per place. [2024-06-21 20:04:24,601 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 285 selfloop transitions, 108 changer transitions 0/400 dead transitions. [2024-06-21 20:04:24,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 400 transitions, 6314 flow [2024-06-21 20:04:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 20:04:24,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-21 20:04:24,602 INFO L175 Difference]: Start difference. First operand has 301 places, 380 transitions, 5342 flow. Second operand 6 states and 148 transitions. [2024-06-21 20:04:24,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 400 transitions, 6314 flow [2024-06-21 20:04:25,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 400 transitions, 6011 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:25,230 INFO L231 Difference]: Finished difference. Result has 302 places, 380 transitions, 5270 flow [2024-06-21 20:04:25,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5039, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5270, PETRI_PLACES=302, PETRI_TRANSITIONS=380} [2024-06-21 20:04:25,231 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 261 predicate places. [2024-06-21 20:04:25,231 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 380 transitions, 5270 flow [2024-06-21 20:04:25,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:25,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:25,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:25,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 20:04:25,231 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:25,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:25,231 INFO L85 PathProgramCache]: Analyzing trace with hash 705718430, now seen corresponding path program 9 times [2024-06-21 20:04:25,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:25,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13432876] [2024-06-21 20:04:25,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:25,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:25,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:25,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13432876] [2024-06-21 20:04:25,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13432876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:25,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:25,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:25,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906248978] [2024-06-21 20:04:25,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:25,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:25,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:25,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:25,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:25,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:25,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 380 transitions, 5270 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:25,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:25,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:25,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:25,920 INFO L124 PetriNetUnfolderBase]: 2311/3910 cut-off events. [2024-06-21 20:04:25,920 INFO L125 PetriNetUnfolderBase]: For 228897/228906 co-relation queries the response was YES. [2024-06-21 20:04:25,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25838 conditions, 3910 events. 2311/3910 cut-off events. For 228897/228906 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24896 event pairs, 518 based on Foata normal form. 5/3907 useless extension candidates. Maximal degree in co-relation 25699. Up to 3349 conditions per place. [2024-06-21 20:04:25,962 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 270 selfloop transitions, 113 changer transitions 0/390 dead transitions. [2024-06-21 20:04:25,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 390 transitions, 6060 flow [2024-06-21 20:04:25,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:25,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:25,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-21 20:04:25,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:04:25,963 INFO L175 Difference]: Start difference. First operand has 302 places, 380 transitions, 5270 flow. Second operand 6 states and 138 transitions. [2024-06-21 20:04:25,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 390 transitions, 6060 flow [2024-06-21 20:04:26,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 390 transitions, 5839 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:26,490 INFO L231 Difference]: Finished difference. Result has 302 places, 380 transitions, 5281 flow [2024-06-21 20:04:26,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5049, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5281, PETRI_PLACES=302, PETRI_TRANSITIONS=380} [2024-06-21 20:04:26,490 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 261 predicate places. [2024-06-21 20:04:26,491 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 380 transitions, 5281 flow [2024-06-21 20:04:26,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:26,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:26,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:26,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 20:04:26,491 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:26,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:26,491 INFO L85 PathProgramCache]: Analyzing trace with hash 705715454, now seen corresponding path program 4 times [2024-06-21 20:04:26,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:26,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105197000] [2024-06-21 20:04:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:26,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:26,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:26,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105197000] [2024-06-21 20:04:26,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105197000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:26,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:26,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:26,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655133966] [2024-06-21 20:04:26,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:26,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:26,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:26,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:26,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:26,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:26,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 380 transitions, 5281 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:26,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:26,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:26,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:27,171 INFO L124 PetriNetUnfolderBase]: 2339/3951 cut-off events. [2024-06-21 20:04:27,172 INFO L125 PetriNetUnfolderBase]: For 239036/239042 co-relation queries the response was YES. [2024-06-21 20:04:27,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25931 conditions, 3951 events. 2339/3951 cut-off events. For 239036/239042 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 25087 event pairs, 474 based on Foata normal form. 10/3956 useless extension candidates. Maximal degree in co-relation 25793. Up to 3540 conditions per place. [2024-06-21 20:04:27,220 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 355 selfloop transitions, 35 changer transitions 0/397 dead transitions. [2024-06-21 20:04:27,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 397 transitions, 6149 flow [2024-06-21 20:04:27,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:27,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:27,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-21 20:04:27,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-21 20:04:27,222 INFO L175 Difference]: Start difference. First operand has 302 places, 380 transitions, 5281 flow. Second operand 6 states and 137 transitions. [2024-06-21 20:04:27,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 397 transitions, 6149 flow [2024-06-21 20:04:27,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 397 transitions, 5760 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:27,808 INFO L231 Difference]: Finished difference. Result has 301 places, 381 transitions, 4980 flow [2024-06-21 20:04:27,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4892, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4980, PETRI_PLACES=301, PETRI_TRANSITIONS=381} [2024-06-21 20:04:27,809 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 260 predicate places. [2024-06-21 20:04:27,809 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 381 transitions, 4980 flow [2024-06-21 20:04:27,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:27,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:27,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:27,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 20:04:27,809 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:27,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:27,810 INFO L85 PathProgramCache]: Analyzing trace with hash 694990694, now seen corresponding path program 5 times [2024-06-21 20:04:27,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:27,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173539580] [2024-06-21 20:04:27,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:27,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:27,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:27,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173539580] [2024-06-21 20:04:27,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173539580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:27,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:27,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:27,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972641685] [2024-06-21 20:04:27,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:27,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:27,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:27,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:27,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:27,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:27,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 381 transitions, 4980 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:27,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:27,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:27,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:28,478 INFO L124 PetriNetUnfolderBase]: 2354/3983 cut-off events. [2024-06-21 20:04:28,479 INFO L125 PetriNetUnfolderBase]: For 238260/238272 co-relation queries the response was YES. [2024-06-21 20:04:28,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25774 conditions, 3983 events. 2354/3983 cut-off events. For 238260/238272 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 25385 event pairs, 470 based on Foata normal form. 18/3998 useless extension candidates. Maximal degree in co-relation 25636. Up to 3533 conditions per place. [2024-06-21 20:04:28,524 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 362 selfloop transitions, 35 changer transitions 0/404 dead transitions. [2024-06-21 20:04:28,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 404 transitions, 5880 flow [2024-06-21 20:04:28,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:28,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:28,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 20:04:28,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-21 20:04:28,525 INFO L175 Difference]: Start difference. First operand has 301 places, 381 transitions, 4980 flow. Second operand 6 states and 142 transitions. [2024-06-21 20:04:28,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 404 transitions, 5880 flow [2024-06-21 20:04:29,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 404 transitions, 5809 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:29,226 INFO L231 Difference]: Finished difference. Result has 303 places, 382 transitions, 5002 flow [2024-06-21 20:04:29,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4909, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5002, PETRI_PLACES=303, PETRI_TRANSITIONS=382} [2024-06-21 20:04:29,227 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 262 predicate places. [2024-06-21 20:04:29,227 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 382 transitions, 5002 flow [2024-06-21 20:04:29,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:29,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:29,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:29,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 20:04:29,227 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:29,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:29,228 INFO L85 PathProgramCache]: Analyzing trace with hash 694664264, now seen corresponding path program 6 times [2024-06-21 20:04:29,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:29,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627139798] [2024-06-21 20:04:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:29,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:29,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:29,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627139798] [2024-06-21 20:04:29,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627139798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:29,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:29,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:29,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447344373] [2024-06-21 20:04:29,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:29,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:29,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:29,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:29,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:29,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:29,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 382 transitions, 5002 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:29,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:29,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:29,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:29,881 INFO L124 PetriNetUnfolderBase]: 2341/3964 cut-off events. [2024-06-21 20:04:29,881 INFO L125 PetriNetUnfolderBase]: For 224992/225004 co-relation queries the response was YES. [2024-06-21 20:04:29,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25392 conditions, 3964 events. 2341/3964 cut-off events. For 224992/225004 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 25256 event pairs, 364 based on Foata normal form. 16/3977 useless extension candidates. Maximal degree in co-relation 25253. Up to 3326 conditions per place. [2024-06-21 20:04:29,926 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 360 selfloop transitions, 43 changer transitions 0/410 dead transitions. [2024-06-21 20:04:29,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 410 transitions, 5925 flow [2024-06-21 20:04:29,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:29,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:29,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 20:04:29,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-21 20:04:29,927 INFO L175 Difference]: Start difference. First operand has 303 places, 382 transitions, 5002 flow. Second operand 6 states and 148 transitions. [2024-06-21 20:04:29,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 410 transitions, 5925 flow [2024-06-21 20:04:30,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 410 transitions, 5851 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:30,555 INFO L231 Difference]: Finished difference. Result has 305 places, 382 transitions, 5022 flow [2024-06-21 20:04:30,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4928, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5022, PETRI_PLACES=305, PETRI_TRANSITIONS=382} [2024-06-21 20:04:30,555 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 264 predicate places. [2024-06-21 20:04:30,555 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 382 transitions, 5022 flow [2024-06-21 20:04:30,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:30,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:30,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:30,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 20:04:30,556 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:30,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash 706115168, now seen corresponding path program 1 times [2024-06-21 20:04:30,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:30,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739577985] [2024-06-21 20:04:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:30,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:30,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:30,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739577985] [2024-06-21 20:04:30,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739577985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:30,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:30,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:30,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108136286] [2024-06-21 20:04:30,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:30,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:30,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:30,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:30,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:30,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:30,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 382 transitions, 5022 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:30,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:30,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:30,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:31,204 INFO L124 PetriNetUnfolderBase]: 2361/3995 cut-off events. [2024-06-21 20:04:31,204 INFO L125 PetriNetUnfolderBase]: For 225988/225994 co-relation queries the response was YES. [2024-06-21 20:04:31,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25585 conditions, 3995 events. 2361/3995 cut-off events. For 225988/225994 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 25520 event pairs, 470 based on Foata normal form. 8/3998 useless extension candidates. Maximal degree in co-relation 25446. Up to 3478 conditions per place. [2024-06-21 20:04:31,251 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 358 selfloop transitions, 40 changer transitions 0/405 dead transitions. [2024-06-21 20:04:31,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 405 transitions, 5935 flow [2024-06-21 20:04:31,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:31,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 20:04:31,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 20:04:31,252 INFO L175 Difference]: Start difference. First operand has 305 places, 382 transitions, 5022 flow. Second operand 6 states and 140 transitions. [2024-06-21 20:04:31,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 405 transitions, 5935 flow [2024-06-21 20:04:31,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 405 transitions, 5841 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:31,830 INFO L231 Difference]: Finished difference. Result has 306 places, 386 transitions, 5057 flow [2024-06-21 20:04:31,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4928, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5057, PETRI_PLACES=306, PETRI_TRANSITIONS=386} [2024-06-21 20:04:31,830 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-21 20:04:31,830 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 386 transitions, 5057 flow [2024-06-21 20:04:31,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:31,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:31,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:31,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 20:04:31,831 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:31,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:31,831 INFO L85 PathProgramCache]: Analyzing trace with hash -509720218, now seen corresponding path program 13 times [2024-06-21 20:04:31,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:31,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187207299] [2024-06-21 20:04:31,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:31,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:31,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:31,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187207299] [2024-06-21 20:04:31,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187207299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:31,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:31,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:31,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671848084] [2024-06-21 20:04:31,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:31,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:31,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:31,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:31,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:31,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:31,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 386 transitions, 5057 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:31,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:31,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:31,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:32,683 INFO L124 PetriNetUnfolderBase]: 2390/4049 cut-off events. [2024-06-21 20:04:32,683 INFO L125 PetriNetUnfolderBase]: For 215726/215741 co-relation queries the response was YES. [2024-06-21 20:04:32,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26022 conditions, 4049 events. 2390/4049 cut-off events. For 215726/215741 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 25997 event pairs, 493 based on Foata normal form. 13/4056 useless extension candidates. Maximal degree in co-relation 25883. Up to 3215 conditions per place. [2024-06-21 20:04:32,738 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 246 selfloop transitions, 176 changer transitions 0/429 dead transitions. [2024-06-21 20:04:32,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 429 transitions, 6409 flow [2024-06-21 20:04:32,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:32,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:32,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-21 20:04:32,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-21 20:04:32,739 INFO L175 Difference]: Start difference. First operand has 306 places, 386 transitions, 5057 flow. Second operand 9 states and 219 transitions. [2024-06-21 20:04:32,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 429 transitions, 6409 flow [2024-06-21 20:04:33,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 429 transitions, 6363 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 20:04:33,367 INFO L231 Difference]: Finished difference. Result has 314 places, 396 transitions, 5593 flow [2024-06-21 20:04:33,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5011, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5593, PETRI_PLACES=314, PETRI_TRANSITIONS=396} [2024-06-21 20:04:33,367 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-21 20:04:33,367 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 396 transitions, 5593 flow [2024-06-21 20:04:33,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:33,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:33,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:33,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 20:04:33,368 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:33,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:33,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1143367704, now seen corresponding path program 14 times [2024-06-21 20:04:33,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:33,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173713115] [2024-06-21 20:04:33,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:33,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:33,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:33,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173713115] [2024-06-21 20:04:33,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173713115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:33,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:33,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:33,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549607603] [2024-06-21 20:04:33,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:33,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:33,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:33,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:33,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:33,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:33,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 396 transitions, 5593 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:33,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:33,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:33,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:34,120 INFO L124 PetriNetUnfolderBase]: 2395/4058 cut-off events. [2024-06-21 20:04:34,120 INFO L125 PetriNetUnfolderBase]: For 223439/223454 co-relation queries the response was YES. [2024-06-21 20:04:34,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26829 conditions, 4058 events. 2395/4058 cut-off events. For 223439/223454 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 26037 event pairs, 493 based on Foata normal form. 13/4065 useless extension candidates. Maximal degree in co-relation 26687. Up to 3219 conditions per place. [2024-06-21 20:04:34,170 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 247 selfloop transitions, 180 changer transitions 0/434 dead transitions. [2024-06-21 20:04:34,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 434 transitions, 6872 flow [2024-06-21 20:04:34,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:04:34,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:04:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-21 20:04:34,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-21 20:04:34,171 INFO L175 Difference]: Start difference. First operand has 314 places, 396 transitions, 5593 flow. Second operand 11 states and 255 transitions. [2024-06-21 20:04:34,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 434 transitions, 6872 flow [2024-06-21 20:04:34,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 434 transitions, 6471 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:34,782 INFO L231 Difference]: Finished difference. Result has 320 places, 399 transitions, 5617 flow [2024-06-21 20:04:34,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5220, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5617, PETRI_PLACES=320, PETRI_TRANSITIONS=399} [2024-06-21 20:04:34,782 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-21 20:04:34,782 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 399 transitions, 5617 flow [2024-06-21 20:04:34,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:34,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:34,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:34,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 20:04:34,783 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:34,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:34,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1311661730, now seen corresponding path program 15 times [2024-06-21 20:04:34,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:34,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928367216] [2024-06-21 20:04:34,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:34,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:34,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:34,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928367216] [2024-06-21 20:04:34,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928367216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:34,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:34,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:34,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413607816] [2024-06-21 20:04:34,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:34,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:34,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:34,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:34,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:34,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:34,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 399 transitions, 5617 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:34,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:34,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:34,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:35,522 INFO L124 PetriNetUnfolderBase]: 2421/4102 cut-off events. [2024-06-21 20:04:35,522 INFO L125 PetriNetUnfolderBase]: For 236631/236646 co-relation queries the response was YES. [2024-06-21 20:04:35,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27197 conditions, 4102 events. 2421/4102 cut-off events. For 236631/236646 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 26425 event pairs, 493 based on Foata normal form. 14/4110 useless extension candidates. Maximal degree in co-relation 27054. Up to 3244 conditions per place. [2024-06-21 20:04:35,572 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 243 selfloop transitions, 187 changer transitions 0/437 dead transitions. [2024-06-21 20:04:35,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 437 transitions, 6957 flow [2024-06-21 20:04:35,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:04:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:04:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-21 20:04:35,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-21 20:04:35,573 INFO L175 Difference]: Start difference. First operand has 320 places, 399 transitions, 5617 flow. Second operand 10 states and 232 transitions. [2024-06-21 20:04:35,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 437 transitions, 6957 flow [2024-06-21 20:04:36,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 437 transitions, 6565 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 20:04:36,286 INFO L231 Difference]: Finished difference. Result has 321 places, 408 transitions, 5716 flow [2024-06-21 20:04:36,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5243, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5716, PETRI_PLACES=321, PETRI_TRANSITIONS=408} [2024-06-21 20:04:36,287 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 280 predicate places. [2024-06-21 20:04:36,287 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 408 transitions, 5716 flow [2024-06-21 20:04:36,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:36,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:36,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:36,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 20:04:36,287 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:36,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:36,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1048377732, now seen corresponding path program 16 times [2024-06-21 20:04:36,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:36,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259681943] [2024-06-21 20:04:36,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:36,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:36,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:36,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259681943] [2024-06-21 20:04:36,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259681943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:36,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:36,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:36,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742796486] [2024-06-21 20:04:36,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:36,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:36,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:36,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:36,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:36,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:36,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 408 transitions, 5716 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:36,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:36,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:36,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:37,063 INFO L124 PetriNetUnfolderBase]: 2458/4152 cut-off events. [2024-06-21 20:04:37,063 INFO L125 PetriNetUnfolderBase]: For 249878/249878 co-relation queries the response was YES. [2024-06-21 20:04:37,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27965 conditions, 4152 events. 2458/4152 cut-off events. For 249878/249878 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26673 event pairs, 480 based on Foata normal form. 1/4144 useless extension candidates. Maximal degree in co-relation 27821. Up to 3275 conditions per place. [2024-06-21 20:04:37,119 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 214 selfloop transitions, 238 changer transitions 0/459 dead transitions. [2024-06-21 20:04:37,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 459 transitions, 7486 flow [2024-06-21 20:04:37,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:04:37,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:04:37,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-21 20:04:37,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6175 [2024-06-21 20:04:37,120 INFO L175 Difference]: Start difference. First operand has 321 places, 408 transitions, 5716 flow. Second operand 10 states and 247 transitions. [2024-06-21 20:04:37,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 459 transitions, 7486 flow [2024-06-21 20:04:37,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 459 transitions, 7170 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:37,819 INFO L231 Difference]: Finished difference. Result has 325 places, 420 transitions, 6080 flow [2024-06-21 20:04:37,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5417, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6080, PETRI_PLACES=325, PETRI_TRANSITIONS=420} [2024-06-21 20:04:37,820 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-21 20:04:37,820 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 420 transitions, 6080 flow [2024-06-21 20:04:37,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:37,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:37,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:37,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 20:04:37,821 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:37,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:37,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1632261560, now seen corresponding path program 17 times [2024-06-21 20:04:37,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:37,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853709923] [2024-06-21 20:04:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:37,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:37,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:37,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853709923] [2024-06-21 20:04:37,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853709923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:37,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:37,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:37,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281782445] [2024-06-21 20:04:37,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:37,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:37,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:37,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:37,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:37,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:37,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 420 transitions, 6080 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:37,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:37,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:37,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:38,589 INFO L124 PetriNetUnfolderBase]: 2455/4148 cut-off events. [2024-06-21 20:04:38,589 INFO L125 PetriNetUnfolderBase]: For 254234/254234 co-relation queries the response was YES. [2024-06-21 20:04:38,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28118 conditions, 4148 events. 2455/4148 cut-off events. For 254234/254234 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26624 event pairs, 480 based on Foata normal form. 1/4140 useless extension candidates. Maximal degree in co-relation 27973. Up to 3273 conditions per place. [2024-06-21 20:04:38,644 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 212 selfloop transitions, 232 changer transitions 0/451 dead transitions. [2024-06-21 20:04:38,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 451 transitions, 7502 flow [2024-06-21 20:04:38,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:38,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 20:04:38,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:04:38,645 INFO L175 Difference]: Start difference. First operand has 325 places, 420 transitions, 6080 flow. Second operand 8 states and 200 transitions. [2024-06-21 20:04:38,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 451 transitions, 7502 flow [2024-06-21 20:04:39,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 451 transitions, 6978 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:39,384 INFO L231 Difference]: Finished difference. Result has 326 places, 421 transitions, 6058 flow [2024-06-21 20:04:39,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5565, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6058, PETRI_PLACES=326, PETRI_TRANSITIONS=421} [2024-06-21 20:04:39,385 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-06-21 20:04:39,385 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 421 transitions, 6058 flow [2024-06-21 20:04:39,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:39,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:39,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:39,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 20:04:39,385 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:39,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:39,385 INFO L85 PathProgramCache]: Analyzing trace with hash -274428176, now seen corresponding path program 18 times [2024-06-21 20:04:39,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:39,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067800968] [2024-06-21 20:04:39,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:39,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:39,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:39,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067800968] [2024-06-21 20:04:39,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067800968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:39,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:39,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:39,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211705783] [2024-06-21 20:04:39,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:39,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:39,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:39,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:39,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:39,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:39,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 421 transitions, 6058 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:39,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:39,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:39,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:40,203 INFO L124 PetriNetUnfolderBase]: 2452/4147 cut-off events. [2024-06-21 20:04:40,204 INFO L125 PetriNetUnfolderBase]: For 250589/250592 co-relation queries the response was YES. [2024-06-21 20:04:40,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27999 conditions, 4147 events. 2452/4147 cut-off events. For 250589/250592 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26649 event pairs, 468 based on Foata normal form. 3/4145 useless extension candidates. Maximal degree in co-relation 27854. Up to 3595 conditions per place. [2024-06-21 20:04:40,252 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 331 selfloop transitions, 107 changer transitions 0/445 dead transitions. [2024-06-21 20:04:40,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 445 transitions, 6994 flow [2024-06-21 20:04:40,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:40,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 20:04:40,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-21 20:04:40,253 INFO L175 Difference]: Start difference. First operand has 326 places, 421 transitions, 6058 flow. Second operand 8 states and 189 transitions. [2024-06-21 20:04:40,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 445 transitions, 6994 flow [2024-06-21 20:04:40,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 445 transitions, 6492 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 20:04:40,971 INFO L231 Difference]: Finished difference. Result has 326 places, 421 transitions, 5780 flow [2024-06-21 20:04:40,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5556, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5780, PETRI_PLACES=326, PETRI_TRANSITIONS=421} [2024-06-21 20:04:40,972 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-06-21 20:04:40,972 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 421 transitions, 5780 flow [2024-06-21 20:04:40,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:40,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:40,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:40,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 20:04:40,972 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:40,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:40,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1626600650, now seen corresponding path program 19 times [2024-06-21 20:04:40,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:40,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998822903] [2024-06-21 20:04:40,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:40,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:41,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:41,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998822903] [2024-06-21 20:04:41,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998822903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:41,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:41,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:41,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326949497] [2024-06-21 20:04:41,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:41,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:41,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:41,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:41,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:41,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:41,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 421 transitions, 5780 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:41,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:41,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:41,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:41,733 INFO L124 PetriNetUnfolderBase]: 2449/4140 cut-off events. [2024-06-21 20:04:41,733 INFO L125 PetriNetUnfolderBase]: For 246444/246444 co-relation queries the response was YES. [2024-06-21 20:04:41,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27486 conditions, 4140 events. 2449/4140 cut-off events. For 246444/246444 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26631 event pairs, 480 based on Foata normal form. 1/4132 useless extension candidates. Maximal degree in co-relation 27341. Up to 3269 conditions per place. [2024-06-21 20:04:41,786 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 207 selfloop transitions, 244 changer transitions 0/458 dead transitions. [2024-06-21 20:04:41,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 458 transitions, 7225 flow [2024-06-21 20:04:41,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:04:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:04:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-21 20:04:41,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5886363636363636 [2024-06-21 20:04:41,787 INFO L175 Difference]: Start difference. First operand has 326 places, 421 transitions, 5780 flow. Second operand 11 states and 259 transitions. [2024-06-21 20:04:41,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 458 transitions, 7225 flow [2024-06-21 20:04:42,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 458 transitions, 6989 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 20:04:42,518 INFO L231 Difference]: Finished difference. Result has 329 places, 422 transitions, 6065 flow [2024-06-21 20:04:42,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5550, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6065, PETRI_PLACES=329, PETRI_TRANSITIONS=422} [2024-06-21 20:04:42,518 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-21 20:04:42,518 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 422 transitions, 6065 flow [2024-06-21 20:04:42,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:42,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:42,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:42,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 20:04:42,519 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:42,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:42,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1622887160, now seen corresponding path program 20 times [2024-06-21 20:04:42,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:42,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495110808] [2024-06-21 20:04:42,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:42,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:42,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:42,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495110808] [2024-06-21 20:04:42,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495110808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:42,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:42,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:42,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568586266] [2024-06-21 20:04:42,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:42,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:42,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:42,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:42,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:42,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:42,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 422 transitions, 6065 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:42,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:42,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:42,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:43,298 INFO L124 PetriNetUnfolderBase]: 2446/4139 cut-off events. [2024-06-21 20:04:43,299 INFO L125 PetriNetUnfolderBase]: For 244829/244832 co-relation queries the response was YES. [2024-06-21 20:04:43,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27809 conditions, 4139 events. 2446/4139 cut-off events. For 244829/244832 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26621 event pairs, 468 based on Foata normal form. 3/4137 useless extension candidates. Maximal degree in co-relation 27664. Up to 3559 conditions per place. [2024-06-21 20:04:43,351 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 308 selfloop transitions, 136 changer transitions 0/451 dead transitions. [2024-06-21 20:04:43,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 451 transitions, 7169 flow [2024-06-21 20:04:43,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:04:43,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:04:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 265 transitions. [2024-06-21 20:04:43,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5520833333333334 [2024-06-21 20:04:43,352 INFO L175 Difference]: Start difference. First operand has 329 places, 422 transitions, 6065 flow. Second operand 12 states and 265 transitions. [2024-06-21 20:04:43,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 451 transitions, 7169 flow [2024-06-21 20:04:44,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 451 transitions, 6733 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 20:04:44,211 INFO L231 Difference]: Finished difference. Result has 332 places, 422 transitions, 5917 flow [2024-06-21 20:04:44,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5631, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5917, PETRI_PLACES=332, PETRI_TRANSITIONS=422} [2024-06-21 20:04:44,211 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 291 predicate places. [2024-06-21 20:04:44,212 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 422 transitions, 5917 flow [2024-06-21 20:04:44,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:44,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:44,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:44,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 20:04:44,212 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:44,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:44,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1622881580, now seen corresponding path program 21 times [2024-06-21 20:04:44,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:44,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361525753] [2024-06-21 20:04:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:44,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:44,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:44,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361525753] [2024-06-21 20:04:44,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361525753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:44,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:44,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:44,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040613659] [2024-06-21 20:04:44,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:44,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:44,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:44,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:44,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:44,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:44,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 422 transitions, 5917 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:44,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:44,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:44,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:44,991 INFO L124 PetriNetUnfolderBase]: 2443/4135 cut-off events. [2024-06-21 20:04:44,991 INFO L125 PetriNetUnfolderBase]: For 241714/241717 co-relation queries the response was YES. [2024-06-21 20:04:45,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27409 conditions, 4135 events. 2443/4135 cut-off events. For 241714/241717 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26594 event pairs, 468 based on Foata normal form. 3/4133 useless extension candidates. Maximal degree in co-relation 27264. Up to 3556 conditions per place. [2024-06-21 20:04:45,045 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 305 selfloop transitions, 136 changer transitions 0/448 dead transitions. [2024-06-21 20:04:45,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 448 transitions, 6863 flow [2024-06-21 20:04:45,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:04:45,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:04:45,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-21 20:04:45,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675 [2024-06-21 20:04:45,046 INFO L175 Difference]: Start difference. First operand has 332 places, 422 transitions, 5917 flow. Second operand 10 states and 227 transitions. [2024-06-21 20:04:45,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 448 transitions, 6863 flow [2024-06-21 20:04:45,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 448 transitions, 6541 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-21 20:04:45,781 INFO L231 Difference]: Finished difference. Result has 330 places, 422 transitions, 5881 flow [2024-06-21 20:04:45,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5595, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5881, PETRI_PLACES=330, PETRI_TRANSITIONS=422} [2024-06-21 20:04:45,782 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 289 predicate places. [2024-06-21 20:04:45,782 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 422 transitions, 5881 flow [2024-06-21 20:04:45,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:45,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:45,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:45,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 20:04:45,782 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:45,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:45,782 INFO L85 PathProgramCache]: Analyzing trace with hash 692844632, now seen corresponding path program 22 times [2024-06-21 20:04:45,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:45,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572413882] [2024-06-21 20:04:45,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:45,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:45,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:45,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572413882] [2024-06-21 20:04:45,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572413882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:45,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:45,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:45,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592396897] [2024-06-21 20:04:45,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:45,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:45,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:45,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:45,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:45,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:45,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 422 transitions, 5881 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:45,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:45,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:45,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:46,529 INFO L124 PetriNetUnfolderBase]: 2437/4133 cut-off events. [2024-06-21 20:04:46,529 INFO L125 PetriNetUnfolderBase]: For 234499/234514 co-relation queries the response was YES. [2024-06-21 20:04:46,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27111 conditions, 4133 events. 2437/4133 cut-off events. For 234499/234514 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26736 event pairs, 493 based on Foata normal form. 14/4141 useless extension candidates. Maximal degree in co-relation 26968. Up to 3342 conditions per place. [2024-06-21 20:04:46,580 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 288 selfloop transitions, 154 changer transitions 0/449 dead transitions. [2024-06-21 20:04:46,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 449 transitions, 6977 flow [2024-06-21 20:04:46,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:46,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:04:46,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-21 20:04:46,583 INFO L175 Difference]: Start difference. First operand has 330 places, 422 transitions, 5881 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:04:46,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 449 transitions, 6977 flow [2024-06-21 20:04:47,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 449 transitions, 6746 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:47,290 INFO L231 Difference]: Finished difference. Result has 330 places, 422 transitions, 5969 flow [2024-06-21 20:04:47,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5969, PETRI_PLACES=330, PETRI_TRANSITIONS=422} [2024-06-21 20:04:47,290 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 289 predicate places. [2024-06-21 20:04:47,291 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 422 transitions, 5969 flow [2024-06-21 20:04:47,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:47,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:47,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:47,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:04:47,291 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:47,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:47,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1892054386, now seen corresponding path program 23 times [2024-06-21 20:04:47,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:47,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324795997] [2024-06-21 20:04:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:47,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:47,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:47,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324795997] [2024-06-21 20:04:47,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324795997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:47,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:47,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:47,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394295850] [2024-06-21 20:04:47,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:47,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:47,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:47,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:47,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:47,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:47,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 422 transitions, 5969 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:47,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:47,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:47,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:48,155 INFO L124 PetriNetUnfolderBase]: 2425/4111 cut-off events. [2024-06-21 20:04:48,156 INFO L125 PetriNetUnfolderBase]: For 234821/234824 co-relation queries the response was YES. [2024-06-21 20:04:48,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26959 conditions, 4111 events. 2425/4111 cut-off events. For 234821/234824 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26501 event pairs, 468 based on Foata normal form. 6/4112 useless extension candidates. Maximal degree in co-relation 26815. Up to 3332 conditions per place. [2024-06-21 20:04:48,205 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 254 selfloop transitions, 201 changer transitions 0/462 dead transitions. [2024-06-21 20:04:48,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 462 transitions, 7271 flow [2024-06-21 20:04:48,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:04:48,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:04:48,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-06-21 20:04:48,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-21 20:04:48,206 INFO L175 Difference]: Start difference. First operand has 330 places, 422 transitions, 5969 flow. Second operand 10 states and 248 transitions. [2024-06-21 20:04:48,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 462 transitions, 7271 flow [2024-06-21 20:04:48,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 462 transitions, 7015 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:48,977 INFO L231 Difference]: Finished difference. Result has 334 places, 422 transitions, 6159 flow [2024-06-21 20:04:48,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5717, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6159, PETRI_PLACES=334, PETRI_TRANSITIONS=422} [2024-06-21 20:04:48,978 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 293 predicate places. [2024-06-21 20:04:48,978 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 422 transitions, 6159 flow [2024-06-21 20:04:48,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:48,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:48,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:48,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:04:48,978 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:48,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:48,979 INFO L85 PathProgramCache]: Analyzing trace with hash 962549282, now seen corresponding path program 24 times [2024-06-21 20:04:48,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:48,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134805004] [2024-06-21 20:04:48,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:48,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:49,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:49,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134805004] [2024-06-21 20:04:49,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134805004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:49,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:49,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:49,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337592295] [2024-06-21 20:04:49,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:49,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:49,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:49,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:49,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:49,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:49,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 422 transitions, 6159 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:49,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:49,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:49,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:49,774 INFO L124 PetriNetUnfolderBase]: 2413/4095 cut-off events. [2024-06-21 20:04:49,774 INFO L125 PetriNetUnfolderBase]: For 224743/224746 co-relation queries the response was YES. [2024-06-21 20:04:49,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26776 conditions, 4095 events. 2413/4095 cut-off events. For 224743/224746 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26387 event pairs, 468 based on Foata normal form. 6/4096 useless extension candidates. Maximal degree in co-relation 26632. Up to 3322 conditions per place. [2024-06-21 20:04:49,828 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 255 selfloop transitions, 199 changer transitions 0/461 dead transitions. [2024-06-21 20:04:49,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 461 transitions, 7311 flow [2024-06-21 20:04:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:04:49,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:04:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-06-21 20:04:49,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6225 [2024-06-21 20:04:49,829 INFO L175 Difference]: Start difference. First operand has 334 places, 422 transitions, 6159 flow. Second operand 10 states and 249 transitions. [2024-06-21 20:04:49,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 461 transitions, 7311 flow [2024-06-21 20:04:50,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 461 transitions, 6838 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-21 20:04:50,650 INFO L231 Difference]: Finished difference. Result has 333 places, 422 transitions, 6122 flow [2024-06-21 20:04:50,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5692, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6122, PETRI_PLACES=333, PETRI_TRANSITIONS=422} [2024-06-21 20:04:50,650 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-21 20:04:50,650 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 422 transitions, 6122 flow [2024-06-21 20:04:50,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:50,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:50,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:50,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:04:50,651 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:50,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:50,651 INFO L85 PathProgramCache]: Analyzing trace with hash -248619634, now seen corresponding path program 25 times [2024-06-21 20:04:50,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:50,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103905295] [2024-06-21 20:04:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:50,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:50,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:50,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103905295] [2024-06-21 20:04:50,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103905295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:50,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:50,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:50,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847051723] [2024-06-21 20:04:50,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:50,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:50,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:50,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:50,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:50,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:50,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 422 transitions, 6122 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:50,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:50,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:50,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:51,449 INFO L124 PetriNetUnfolderBase]: 2415/4093 cut-off events. [2024-06-21 20:04:51,449 INFO L125 PetriNetUnfolderBase]: For 206540/206543 co-relation queries the response was YES. [2024-06-21 20:04:51,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26579 conditions, 4093 events. 2415/4093 cut-off events. For 206540/206543 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26375 event pairs, 480 based on Foata normal form. 4/4085 useless extension candidates. Maximal degree in co-relation 26437. Up to 3235 conditions per place. [2024-06-21 20:04:51,501 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 212 selfloop transitions, 248 changer transitions 0/467 dead transitions. [2024-06-21 20:04:51,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 467 transitions, 7332 flow [2024-06-21 20:04:51,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:04:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:04:51,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-06-21 20:04:51,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-21 20:04:51,501 INFO L175 Difference]: Start difference. First operand has 333 places, 422 transitions, 6122 flow. Second operand 10 states and 252 transitions. [2024-06-21 20:04:51,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 467 transitions, 7332 flow [2024-06-21 20:04:52,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 467 transitions, 6773 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-21 20:04:52,277 INFO L231 Difference]: Finished difference. Result has 331 places, 425 transitions, 6190 flow [2024-06-21 20:04:52,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5571, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6190, PETRI_PLACES=331, PETRI_TRANSITIONS=425} [2024-06-21 20:04:52,277 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 290 predicate places. [2024-06-21 20:04:52,278 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 425 transitions, 6190 flow [2024-06-21 20:04:52,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:52,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:52,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:52,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:04:52,278 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:52,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:52,278 INFO L85 PathProgramCache]: Analyzing trace with hash -887571202, now seen corresponding path program 2 times [2024-06-21 20:04:52,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:52,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318685879] [2024-06-21 20:04:52,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:52,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:52,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:52,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318685879] [2024-06-21 20:04:52,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318685879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:52,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:52,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:52,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359926720] [2024-06-21 20:04:52,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:52,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:52,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:52,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:52,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:52,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:52,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 425 transitions, 6190 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:52,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:52,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:52,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:52,991 INFO L124 PetriNetUnfolderBase]: 2435/4134 cut-off events. [2024-06-21 20:04:52,991 INFO L125 PetriNetUnfolderBase]: For 200411/200411 co-relation queries the response was YES. [2024-06-21 20:04:53,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26594 conditions, 4134 events. 2435/4134 cut-off events. For 200411/200411 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 26677 event pairs, 363 based on Foata normal form. 6/4135 useless extension candidates. Maximal degree in co-relation 26452. Up to 3605 conditions per place. [2024-06-21 20:04:53,040 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 405 selfloop transitions, 44 changer transitions 0/456 dead transitions. [2024-06-21 20:04:53,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 456 transitions, 7228 flow [2024-06-21 20:04:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:53,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:53,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 20:04:53,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-21 20:04:53,041 INFO L175 Difference]: Start difference. First operand has 331 places, 425 transitions, 6190 flow. Second operand 6 states and 151 transitions. [2024-06-21 20:04:53,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 456 transitions, 7228 flow [2024-06-21 20:04:53,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 456 transitions, 6762 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 20:04:53,780 INFO L231 Difference]: Finished difference. Result has 329 places, 428 transitions, 5859 flow [2024-06-21 20:04:53,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5724, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5859, PETRI_PLACES=329, PETRI_TRANSITIONS=428} [2024-06-21 20:04:53,780 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-21 20:04:53,780 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 428 transitions, 5859 flow [2024-06-21 20:04:53,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:53,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:53,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:53,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:04:53,781 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:53,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:53,781 INFO L85 PathProgramCache]: Analyzing trace with hash 135857060, now seen corresponding path program 3 times [2024-06-21 20:04:53,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:53,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458563270] [2024-06-21 20:04:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:53,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:53,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:53,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458563270] [2024-06-21 20:04:53,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458563270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:53,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:53,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:53,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946965928] [2024-06-21 20:04:53,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:53,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:53,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:53,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:53,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:53,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:53,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 428 transitions, 5859 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:53,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:53,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:53,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:54,476 INFO L124 PetriNetUnfolderBase]: 2422/4117 cut-off events. [2024-06-21 20:04:54,477 INFO L125 PetriNetUnfolderBase]: For 172595/172601 co-relation queries the response was YES. [2024-06-21 20:04:54,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25541 conditions, 4117 events. 2422/4117 cut-off events. For 172595/172601 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 26559 event pairs, 391 based on Foata normal form. 8/4120 useless extension candidates. Maximal degree in co-relation 25398. Up to 3350 conditions per place. [2024-06-21 20:04:54,525 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 402 selfloop transitions, 44 changer transitions 0/453 dead transitions. [2024-06-21 20:04:54,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 453 transitions, 6869 flow [2024-06-21 20:04:54,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:54,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 20:04:54,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-21 20:04:54,526 INFO L175 Difference]: Start difference. First operand has 329 places, 428 transitions, 5859 flow. Second operand 6 states and 142 transitions. [2024-06-21 20:04:54,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 453 transitions, 6869 flow [2024-06-21 20:04:55,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 453 transitions, 6819 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 20:04:55,133 INFO L231 Difference]: Finished difference. Result has 334 places, 430 transitions, 5922 flow [2024-06-21 20:04:55,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5809, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5922, PETRI_PLACES=334, PETRI_TRANSITIONS=430} [2024-06-21 20:04:55,133 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 293 predicate places. [2024-06-21 20:04:55,134 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 430 transitions, 5922 flow [2024-06-21 20:04:55,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:55,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:55,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:55,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:04:55,134 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:55,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:55,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1658644938, now seen corresponding path program 1 times [2024-06-21 20:04:55,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:55,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658834523] [2024-06-21 20:04:55,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:55,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:55,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:55,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:55,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658834523] [2024-06-21 20:04:55,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658834523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:55,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:55,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:55,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096803516] [2024-06-21 20:04:55,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:55,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:55,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:55,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:55,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:55,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:55,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 430 transitions, 5922 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:55,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:55,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:55,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:56,000 INFO L124 PetriNetUnfolderBase]: 2581/4394 cut-off events. [2024-06-21 20:04:56,000 INFO L125 PetriNetUnfolderBase]: For 236085/236100 co-relation queries the response was YES. [2024-06-21 20:04:56,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28661 conditions, 4394 events. 2581/4394 cut-off events. For 236085/236100 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 28763 event pairs, 450 based on Foata normal form. 24/4412 useless extension candidates. Maximal degree in co-relation 28515. Up to 3347 conditions per place. [2024-06-21 20:04:56,050 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 374 selfloop transitions, 85 changer transitions 0/466 dead transitions. [2024-06-21 20:04:56,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 466 transitions, 7348 flow [2024-06-21 20:04:56,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:56,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:56,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 20:04:56,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-21 20:04:56,050 INFO L175 Difference]: Start difference. First operand has 334 places, 430 transitions, 5922 flow. Second operand 7 states and 172 transitions. [2024-06-21 20:04:56,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 466 transitions, 7348 flow [2024-06-21 20:04:56,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 466 transitions, 7193 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:56,581 INFO L231 Difference]: Finished difference. Result has 337 places, 435 transitions, 6056 flow [2024-06-21 20:04:56,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5767, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6056, PETRI_PLACES=337, PETRI_TRANSITIONS=435} [2024-06-21 20:04:56,581 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-21 20:04:56,581 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 435 transitions, 6056 flow [2024-06-21 20:04:56,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:56,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:56,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:56,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 20:04:56,582 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:56,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:56,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1497907884, now seen corresponding path program 2 times [2024-06-21 20:04:56,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:56,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926604677] [2024-06-21 20:04:56,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:56,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:56,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:56,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:56,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926604677] [2024-06-21 20:04:56,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926604677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:56,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:56,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:56,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139826665] [2024-06-21 20:04:56,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:56,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:56,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:56,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:56,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:56,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:56,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 435 transitions, 6056 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:56,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:56,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:56,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:57,439 INFO L124 PetriNetUnfolderBase]: 2733/4628 cut-off events. [2024-06-21 20:04:57,439 INFO L125 PetriNetUnfolderBase]: For 287220/287235 co-relation queries the response was YES. [2024-06-21 20:04:57,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31424 conditions, 4628 events. 2733/4628 cut-off events. For 287220/287235 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 30420 event pairs, 574 based on Foata normal form. 24/4646 useless extension candidates. Maximal degree in co-relation 31278. Up to 3810 conditions per place. [2024-06-21 20:04:57,500 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 376 selfloop transitions, 79 changer transitions 0/462 dead transitions. [2024-06-21 20:04:57,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 462 transitions, 7288 flow [2024-06-21 20:04:57,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:57,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:57,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 20:04:57,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-21 20:04:57,501 INFO L175 Difference]: Start difference. First operand has 337 places, 435 transitions, 6056 flow. Second operand 7 states and 166 transitions. [2024-06-21 20:04:57,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 462 transitions, 7288 flow [2024-06-21 20:04:58,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 462 transitions, 7168 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-21 20:04:58,144 INFO L231 Difference]: Finished difference. Result has 343 places, 439 transitions, 6204 flow [2024-06-21 20:04:58,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5936, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6204, PETRI_PLACES=343, PETRI_TRANSITIONS=439} [2024-06-21 20:04:58,144 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 302 predicate places. [2024-06-21 20:04:58,144 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 439 transitions, 6204 flow [2024-06-21 20:04:58,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:58,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:58,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:58,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 20:04:58,144 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:58,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:58,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1498055754, now seen corresponding path program 3 times [2024-06-21 20:04:58,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:58,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881034171] [2024-06-21 20:04:58,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:58,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:58,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:58,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881034171] [2024-06-21 20:04:58,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881034171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:58,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:58,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:58,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48776736] [2024-06-21 20:04:58,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:58,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:58,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:58,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:58,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:58,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:58,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 439 transitions, 6204 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:58,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:58,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:58,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:58,981 INFO L124 PetriNetUnfolderBase]: 2743/4646 cut-off events. [2024-06-21 20:04:58,981 INFO L125 PetriNetUnfolderBase]: For 288240/288255 co-relation queries the response was YES. [2024-06-21 20:04:59,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31318 conditions, 4646 events. 2743/4646 cut-off events. For 288240/288255 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 30578 event pairs, 585 based on Foata normal form. 28/4668 useless extension candidates. Maximal degree in co-relation 31169. Up to 3986 conditions per place. [2024-06-21 20:04:59,042 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 370 selfloop transitions, 82 changer transitions 0/459 dead transitions. [2024-06-21 20:04:59,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 459 transitions, 7219 flow [2024-06-21 20:04:59,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:59,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:59,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 20:04:59,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-21 20:04:59,042 INFO L175 Difference]: Start difference. First operand has 343 places, 439 transitions, 6204 flow. Second operand 7 states and 163 transitions. [2024-06-21 20:04:59,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 459 transitions, 7219 flow [2024-06-21 20:04:59,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 459 transitions, 7091 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:59,703 INFO L231 Difference]: Finished difference. Result has 347 places, 441 transitions, 6297 flow [2024-06-21 20:04:59,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6078, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6297, PETRI_PLACES=347, PETRI_TRANSITIONS=441} [2024-06-21 20:04:59,704 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 306 predicate places. [2024-06-21 20:04:59,704 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 441 transitions, 6297 flow [2024-06-21 20:04:59,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:59,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:59,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:59,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 20:04:59,704 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:59,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:59,704 INFO L85 PathProgramCache]: Analyzing trace with hash 698632022, now seen corresponding path program 4 times [2024-06-21 20:04:59,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:59,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780261529] [2024-06-21 20:04:59,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:59,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:59,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:59,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780261529] [2024-06-21 20:04:59,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780261529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:59,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:59,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:04:59,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315902609] [2024-06-21 20:04:59,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:59,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:04:59,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:59,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:04:59,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:04:59,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:59,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 441 transitions, 6297 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:59,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:59,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:59,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:00,585 INFO L124 PetriNetUnfolderBase]: 2799/4734 cut-off events. [2024-06-21 20:05:00,586 INFO L125 PetriNetUnfolderBase]: For 296436/296451 co-relation queries the response was YES. [2024-06-21 20:05:00,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32075 conditions, 4734 events. 2799/4734 cut-off events. For 296436/296451 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 31229 event pairs, 591 based on Foata normal form. 28/4756 useless extension candidates. Maximal degree in co-relation 31924. Up to 4104 conditions per place. [2024-06-21 20:05:00,647 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 372 selfloop transitions, 83 changer transitions 0/462 dead transitions. [2024-06-21 20:05:00,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 462 transitions, 7321 flow [2024-06-21 20:05:00,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:00,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 20:05:00,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-21 20:05:00,648 INFO L175 Difference]: Start difference. First operand has 347 places, 441 transitions, 6297 flow. Second operand 8 states and 182 transitions. [2024-06-21 20:05:00,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 462 transitions, 7321 flow [2024-06-21 20:05:01,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 462 transitions, 7135 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 20:05:01,349 INFO L231 Difference]: Finished difference. Result has 350 places, 443 transitions, 6335 flow [2024-06-21 20:05:01,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6111, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6335, PETRI_PLACES=350, PETRI_TRANSITIONS=443} [2024-06-21 20:05:01,349 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-21 20:05:01,350 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 443 transitions, 6335 flow [2024-06-21 20:05:01,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:01,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:01,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:01,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 20:05:01,350 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:01,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:01,350 INFO L85 PathProgramCache]: Analyzing trace with hash 693269642, now seen corresponding path program 5 times [2024-06-21 20:05:01,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:01,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111323394] [2024-06-21 20:05:01,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:01,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:01,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:01,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111323394] [2024-06-21 20:05:01,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111323394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:01,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:01,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:01,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476078326] [2024-06-21 20:05:01,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:01,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:01,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:01,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:01,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:01,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:01,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 443 transitions, 6335 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:01,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:01,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:01,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:02,288 INFO L124 PetriNetUnfolderBase]: 2842/4811 cut-off events. [2024-06-21 20:05:02,288 INFO L125 PetriNetUnfolderBase]: For 300624/300639 co-relation queries the response was YES. [2024-06-21 20:05:02,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32438 conditions, 4811 events. 2842/4811 cut-off events. For 300624/300639 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 31820 event pairs, 606 based on Foata normal form. 28/4833 useless extension candidates. Maximal degree in co-relation 32286. Up to 4173 conditions per place. [2024-06-21 20:05:02,355 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 384 selfloop transitions, 71 changer transitions 0/462 dead transitions. [2024-06-21 20:05:02,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 462 transitions, 7359 flow [2024-06-21 20:05:02,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:05:02,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:05:02,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 20:05:02,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-21 20:05:02,357 INFO L175 Difference]: Start difference. First operand has 350 places, 443 transitions, 6335 flow. Second operand 6 states and 143 transitions. [2024-06-21 20:05:02,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 462 transitions, 7359 flow [2024-06-21 20:05:03,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 462 transitions, 7165 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 20:05:03,186 INFO L231 Difference]: Finished difference. Result has 350 places, 445 transitions, 6345 flow [2024-06-21 20:05:03,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6141, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6345, PETRI_PLACES=350, PETRI_TRANSITIONS=445} [2024-06-21 20:05:03,187 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-21 20:05:03,187 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 445 transitions, 6345 flow [2024-06-21 20:05:03,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:03,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:03,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:03,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 20:05:03,187 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:03,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:03,187 INFO L85 PathProgramCache]: Analyzing trace with hash 693121772, now seen corresponding path program 6 times [2024-06-21 20:05:03,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:03,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743556427] [2024-06-21 20:05:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:03,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:03,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:03,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743556427] [2024-06-21 20:05:03,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743556427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:03,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:03,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:03,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088037596] [2024-06-21 20:05:03,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:03,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:03,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:03,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:03,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:03,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:03,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 445 transitions, 6345 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:03,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:03,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:03,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:04,124 INFO L124 PetriNetUnfolderBase]: 2856/4847 cut-off events. [2024-06-21 20:05:04,124 INFO L125 PetriNetUnfolderBase]: For 280418/280433 co-relation queries the response was YES. [2024-06-21 20:05:04,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32169 conditions, 4847 events. 2856/4847 cut-off events. For 280418/280433 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 32142 event pairs, 510 based on Foata normal form. 24/4865 useless extension candidates. Maximal degree in co-relation 32016. Up to 3852 conditions per place. [2024-06-21 20:05:04,184 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 388 selfloop transitions, 77 changer transitions 0/472 dead transitions. [2024-06-21 20:05:04,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 472 transitions, 7585 flow [2024-06-21 20:05:04,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:05:04,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:05:04,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 20:05:04,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:05:04,185 INFO L175 Difference]: Start difference. First operand has 350 places, 445 transitions, 6345 flow. Second operand 6 states and 150 transitions. [2024-06-21 20:05:04,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 472 transitions, 7585 flow [2024-06-21 20:05:04,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 472 transitions, 7411 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 20:05:04,922 INFO L231 Difference]: Finished difference. Result has 353 places, 448 transitions, 6448 flow [2024-06-21 20:05:04,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6171, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6448, PETRI_PLACES=353, PETRI_TRANSITIONS=448} [2024-06-21 20:05:04,922 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 312 predicate places. [2024-06-21 20:05:04,923 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 448 transitions, 6448 flow [2024-06-21 20:05:04,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:04,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:04,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:04,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 20:05:04,923 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:04,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash 698847224, now seen corresponding path program 1 times [2024-06-21 20:05:04,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:04,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927085274] [2024-06-21 20:05:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:04,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:05,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:05,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927085274] [2024-06-21 20:05:05,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927085274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:05,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:05,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:05,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872187728] [2024-06-21 20:05:05,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:05,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:05,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:05,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:05,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:05,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:05,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 448 transitions, 6448 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:05,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:05,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:05,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:05,855 INFO L124 PetriNetUnfolderBase]: 2863/4854 cut-off events. [2024-06-21 20:05:05,855 INFO L125 PetriNetUnfolderBase]: For 274841/274856 co-relation queries the response was YES. [2024-06-21 20:05:05,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31919 conditions, 4854 events. 2863/4854 cut-off events. For 274841/274856 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 32146 event pairs, 571 based on Foata normal form. 24/4872 useless extension candidates. Maximal degree in co-relation 31764. Up to 4068 conditions per place. [2024-06-21 20:05:05,921 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 372 selfloop transitions, 92 changer transitions 0/471 dead transitions. [2024-06-21 20:05:05,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 471 transitions, 7480 flow [2024-06-21 20:05:05,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 20:05:05,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-21 20:05:05,922 INFO L175 Difference]: Start difference. First operand has 353 places, 448 transitions, 6448 flow. Second operand 8 states and 185 transitions. [2024-06-21 20:05:05,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 471 transitions, 7480 flow [2024-06-21 20:05:06,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 471 transitions, 7212 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 20:05:06,876 INFO L231 Difference]: Finished difference. Result has 356 places, 449 transitions, 6391 flow [2024-06-21 20:05:06,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6180, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6391, PETRI_PLACES=356, PETRI_TRANSITIONS=449} [2024-06-21 20:05:06,877 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-21 20:05:06,877 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 449 transitions, 6391 flow [2024-06-21 20:05:06,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:06,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:06,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:06,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 20:05:06,877 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:06,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:06,877 INFO L85 PathProgramCache]: Analyzing trace with hash 641162548, now seen corresponding path program 1 times [2024-06-21 20:05:06,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:06,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325239312] [2024-06-21 20:05:06,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:06,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:06,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:06,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325239312] [2024-06-21 20:05:06,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325239312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:06,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:06,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:06,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133993449] [2024-06-21 20:05:06,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:06,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:06,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:06,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:06,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:06,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:06,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 449 transitions, 6391 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:06,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:06,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:06,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:07,818 INFO L124 PetriNetUnfolderBase]: 2860/4851 cut-off events. [2024-06-21 20:05:07,818 INFO L125 PetriNetUnfolderBase]: For 246152/246164 co-relation queries the response was YES. [2024-06-21 20:05:07,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31315 conditions, 4851 events. 2860/4851 cut-off events. For 246152/246164 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 32156 event pairs, 640 based on Foata normal form. 11/4854 useless extension candidates. Maximal degree in co-relation 31160. Up to 3855 conditions per place. [2024-06-21 20:05:07,876 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 257 selfloop transitions, 211 changer transitions 0/475 dead transitions. [2024-06-21 20:05:07,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 475 transitions, 7683 flow [2024-06-21 20:05:07,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:07,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:07,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 20:05:07,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:05:07,877 INFO L175 Difference]: Start difference. First operand has 356 places, 449 transitions, 6391 flow. Second operand 8 states and 192 transitions. [2024-06-21 20:05:07,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 475 transitions, 7683 flow [2024-06-21 20:05:08,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 475 transitions, 7413 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 20:05:08,774 INFO L231 Difference]: Finished difference. Result has 357 places, 449 transitions, 6549 flow [2024-06-21 20:05:08,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6121, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6549, PETRI_PLACES=357, PETRI_TRANSITIONS=449} [2024-06-21 20:05:08,775 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 316 predicate places. [2024-06-21 20:05:08,775 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 449 transitions, 6549 flow [2024-06-21 20:05:08,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:08,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:08,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:08,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 20:05:08,776 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:08,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:08,776 INFO L85 PathProgramCache]: Analyzing trace with hash 644887198, now seen corresponding path program 2 times [2024-06-21 20:05:08,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:08,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765512133] [2024-06-21 20:05:08,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:08,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:08,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:08,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765512133] [2024-06-21 20:05:08,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765512133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:08,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:08,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:08,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145030607] [2024-06-21 20:05:08,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:08,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:08,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:08,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:08,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:08,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:08,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 449 transitions, 6549 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:08,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:08,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:08,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:09,726 INFO L124 PetriNetUnfolderBase]: 2873/4874 cut-off events. [2024-06-21 20:05:09,726 INFO L125 PetriNetUnfolderBase]: For 254461/254476 co-relation queries the response was YES. [2024-06-21 20:05:09,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31474 conditions, 4874 events. 2873/4874 cut-off events. For 254461/254476 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32389 event pairs, 604 based on Foata normal form. 13/4881 useless extension candidates. Maximal degree in co-relation 31319. Up to 4224 conditions per place. [2024-06-21 20:05:09,791 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 357 selfloop transitions, 115 changer transitions 0/479 dead transitions. [2024-06-21 20:05:09,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 479 transitions, 7787 flow [2024-06-21 20:05:09,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:05:09,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:05:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-21 20:05:09,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 20:05:09,792 INFO L175 Difference]: Start difference. First operand has 357 places, 449 transitions, 6549 flow. Second operand 10 states and 220 transitions. [2024-06-21 20:05:09,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 479 transitions, 7787 flow [2024-06-21 20:05:10,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 479 transitions, 7043 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-21 20:05:10,668 INFO L231 Difference]: Finished difference. Result has 359 places, 455 transitions, 6137 flow [2024-06-21 20:05:10,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5853, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6137, PETRI_PLACES=359, PETRI_TRANSITIONS=455} [2024-06-21 20:05:10,668 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2024-06-21 20:05:10,668 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 455 transitions, 6137 flow [2024-06-21 20:05:10,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:10,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:10,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:10,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 20:05:10,669 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:10,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:10,669 INFO L85 PathProgramCache]: Analyzing trace with hash 644881618, now seen corresponding path program 3 times [2024-06-21 20:05:10,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:10,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282845543] [2024-06-21 20:05:10,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:10,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:10,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:10,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282845543] [2024-06-21 20:05:10,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282845543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:10,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:10,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:10,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072248904] [2024-06-21 20:05:10,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:10,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:10,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:10,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:10,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:10,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:10,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 455 transitions, 6137 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:10,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:10,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:10,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:11,567 INFO L124 PetriNetUnfolderBase]: 2870/4870 cut-off events. [2024-06-21 20:05:11,567 INFO L125 PetriNetUnfolderBase]: For 248172/248187 co-relation queries the response was YES. [2024-06-21 20:05:11,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30693 conditions, 4870 events. 2870/4870 cut-off events. For 248172/248187 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32312 event pairs, 614 based on Foata normal form. 13/4877 useless extension candidates. Maximal degree in co-relation 30540. Up to 4221 conditions per place. [2024-06-21 20:05:11,730 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 355 selfloop transitions, 114 changer transitions 0/476 dead transitions. [2024-06-21 20:05:11,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 476 transitions, 7127 flow [2024-06-21 20:05:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:11,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:11,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 20:05:11,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-21 20:05:11,732 INFO L175 Difference]: Start difference. First operand has 359 places, 455 transitions, 6137 flow. Second operand 8 states and 185 transitions. [2024-06-21 20:05:11,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 476 transitions, 7127 flow [2024-06-21 20:05:12,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 476 transitions, 6984 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:05:12,605 INFO L231 Difference]: Finished difference. Result has 361 places, 455 transitions, 6228 flow [2024-06-21 20:05:12,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5994, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6228, PETRI_PLACES=361, PETRI_TRANSITIONS=455} [2024-06-21 20:05:12,606 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 320 predicate places. [2024-06-21 20:05:12,606 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 455 transitions, 6228 flow [2024-06-21 20:05:12,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:12,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:12,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:12,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 20:05:12,606 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:12,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:12,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1840997022, now seen corresponding path program 4 times [2024-06-21 20:05:12,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:12,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775297692] [2024-06-21 20:05:12,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:12,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:12,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:12,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775297692] [2024-06-21 20:05:12,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775297692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:12,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:12,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:12,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000743910] [2024-06-21 20:05:12,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:12,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:12,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:12,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:12,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:12,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:12,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 455 transitions, 6228 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:12,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:12,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:12,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:13,560 INFO L124 PetriNetUnfolderBase]: 2899/4918 cut-off events. [2024-06-21 20:05:13,561 INFO L125 PetriNetUnfolderBase]: For 263611/263626 co-relation queries the response was YES. [2024-06-21 20:05:13,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31404 conditions, 4918 events. 2899/4918 cut-off events. For 263611/263626 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 32721 event pairs, 604 based on Foata normal form. 13/4925 useless extension candidates. Maximal degree in co-relation 31249. Up to 4233 conditions per place. [2024-06-21 20:05:13,627 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 353 selfloop transitions, 131 changer transitions 0/491 dead transitions. [2024-06-21 20:05:13,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 491 transitions, 7809 flow [2024-06-21 20:05:13,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:05:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:05:13,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 240 transitions. [2024-06-21 20:05:13,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-21 20:05:13,628 INFO L175 Difference]: Start difference. First operand has 361 places, 455 transitions, 6228 flow. Second operand 11 states and 240 transitions. [2024-06-21 20:05:13,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 491 transitions, 7809 flow [2024-06-21 20:05:14,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 491 transitions, 7581 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:05:14,518 INFO L231 Difference]: Finished difference. Result has 366 places, 467 transitions, 6407 flow [2024-06-21 20:05:14,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6000, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6407, PETRI_PLACES=366, PETRI_TRANSITIONS=467} [2024-06-21 20:05:14,519 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-21 20:05:14,519 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 467 transitions, 6407 flow [2024-06-21 20:05:14,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:14,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:14,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:14,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 20:05:14,519 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:14,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:14,520 INFO L85 PathProgramCache]: Analyzing trace with hash 788772148, now seen corresponding path program 5 times [2024-06-21 20:05:14,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:14,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509437229] [2024-06-21 20:05:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:14,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:14,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:14,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509437229] [2024-06-21 20:05:14,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509437229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:14,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:14,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:14,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075172372] [2024-06-21 20:05:14,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:14,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:14,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:14,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:14,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:14,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:14,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 467 transitions, 6407 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:14,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:14,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:14,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:15,451 INFO L124 PetriNetUnfolderBase]: 2896/4914 cut-off events. [2024-06-21 20:05:15,451 INFO L125 PetriNetUnfolderBase]: For 267269/267284 co-relation queries the response was YES. [2024-06-21 20:05:15,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31487 conditions, 4914 events. 2896/4914 cut-off events. For 267269/267284 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 32670 event pairs, 604 based on Foata normal form. 13/4921 useless extension candidates. Maximal degree in co-relation 31330. Up to 4230 conditions per place. [2024-06-21 20:05:15,517 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 351 selfloop transitions, 130 changer transitions 0/488 dead transitions. [2024-06-21 20:05:15,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 488 transitions, 7723 flow [2024-06-21 20:05:15,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:05:15,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:05:15,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 20:05:15,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-21 20:05:15,517 INFO L175 Difference]: Start difference. First operand has 366 places, 467 transitions, 6407 flow. Second operand 9 states and 203 transitions. [2024-06-21 20:05:15,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 488 transitions, 7723 flow [2024-06-21 20:05:16,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 488 transitions, 7469 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 20:05:16,473 INFO L231 Difference]: Finished difference. Result has 369 places, 467 transitions, 6419 flow [2024-06-21 20:05:16,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6153, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6419, PETRI_PLACES=369, PETRI_TRANSITIONS=467} [2024-06-21 20:05:16,474 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-21 20:05:16,474 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 467 transitions, 6419 flow [2024-06-21 20:05:16,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:16,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:16,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:16,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 20:05:16,474 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:16,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:16,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1848348672, now seen corresponding path program 6 times [2024-06-21 20:05:16,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:16,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826597620] [2024-06-21 20:05:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:16,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:16,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:16,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826597620] [2024-06-21 20:05:16,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826597620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:16,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:16,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:16,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803345375] [2024-06-21 20:05:16,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:16,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:16,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:16,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:16,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:16,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:16,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 467 transitions, 6419 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:16,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:16,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:16,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:17,501 INFO L124 PetriNetUnfolderBase]: 2893/4910 cut-off events. [2024-06-21 20:05:17,501 INFO L125 PetriNetUnfolderBase]: For 269621/269636 co-relation queries the response was YES. [2024-06-21 20:05:17,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31478 conditions, 4910 events. 2893/4910 cut-off events. For 269621/269636 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 32626 event pairs, 614 based on Foata normal form. 13/4917 useless extension candidates. Maximal degree in co-relation 31320. Up to 4227 conditions per place. [2024-06-21 20:05:17,569 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 344 selfloop transitions, 137 changer transitions 0/488 dead transitions. [2024-06-21 20:05:17,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 488 transitions, 7585 flow [2024-06-21 20:05:17,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:05:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:05:17,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-21 20:05:17,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425 [2024-06-21 20:05:17,570 INFO L175 Difference]: Start difference. First operand has 369 places, 467 transitions, 6419 flow. Second operand 10 states and 217 transitions. [2024-06-21 20:05:17,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 488 transitions, 7585 flow [2024-06-21 20:05:18,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 488 transitions, 7323 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 20:05:18,471 INFO L231 Difference]: Finished difference. Result has 371 places, 467 transitions, 6437 flow [2024-06-21 20:05:18,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6157, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6437, PETRI_PLACES=371, PETRI_TRANSITIONS=467} [2024-06-21 20:05:18,472 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-21 20:05:18,472 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 467 transitions, 6437 flow [2024-06-21 20:05:18,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:18,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:18,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:18,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 20:05:18,472 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:18,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:18,473 INFO L85 PathProgramCache]: Analyzing trace with hash 211256563, now seen corresponding path program 1 times [2024-06-21 20:05:18,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:18,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604393213] [2024-06-21 20:05:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:18,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:18,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:18,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604393213] [2024-06-21 20:05:18,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604393213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:18,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:18,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:18,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805996846] [2024-06-21 20:05:18,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:18,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:18,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:18,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:18,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:18,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:18,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 467 transitions, 6437 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:18,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:18,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:18,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:19,408 INFO L124 PetriNetUnfolderBase]: 2973/5008 cut-off events. [2024-06-21 20:05:19,408 INFO L125 PetriNetUnfolderBase]: For 316860/316860 co-relation queries the response was YES. [2024-06-21 20:05:19,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33445 conditions, 5008 events. 2973/5008 cut-off events. For 316860/316860 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 33146 event pairs, 602 based on Foata normal form. 2/4993 useless extension candidates. Maximal degree in co-relation 33286. Up to 4310 conditions per place. [2024-06-21 20:05:19,475 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 395 selfloop transitions, 104 changer transitions 0/506 dead transitions. [2024-06-21 20:05:19,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 506 transitions, 7826 flow [2024-06-21 20:05:19,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:19,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 20:05:19,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-21 20:05:19,476 INFO L175 Difference]: Start difference. First operand has 371 places, 467 transitions, 6437 flow. Second operand 8 states and 198 transitions. [2024-06-21 20:05:19,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 506 transitions, 7826 flow [2024-06-21 20:05:20,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 506 transitions, 7570 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 20:05:20,300 INFO L231 Difference]: Finished difference. Result has 372 places, 473 transitions, 6551 flow [2024-06-21 20:05:20,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6181, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6551, PETRI_PLACES=372, PETRI_TRANSITIONS=473} [2024-06-21 20:05:20,301 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 331 predicate places. [2024-06-21 20:05:20,301 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 473 transitions, 6551 flow [2024-06-21 20:05:20,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:20,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:20,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:20,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 20:05:20,301 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:20,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:20,301 INFO L85 PathProgramCache]: Analyzing trace with hash 153418609, now seen corresponding path program 2 times [2024-06-21 20:05:20,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:20,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093138433] [2024-06-21 20:05:20,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:20,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:20,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:20,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:20,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093138433] [2024-06-21 20:05:20,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093138433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:20,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:20,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:20,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120000167] [2024-06-21 20:05:20,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:20,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:20,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:20,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:20,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:20,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:20,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 473 transitions, 6551 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:20,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:20,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:20,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:21,241 INFO L124 PetriNetUnfolderBase]: 2968/5012 cut-off events. [2024-06-21 20:05:21,242 INFO L125 PetriNetUnfolderBase]: For 319545/319545 co-relation queries the response was YES. [2024-06-21 20:05:21,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33515 conditions, 5012 events. 2968/5012 cut-off events. For 319545/319545 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 33248 event pairs, 602 based on Foata normal form. 2/5003 useless extension candidates. Maximal degree in co-relation 33354. Up to 4395 conditions per place. [2024-06-21 20:05:21,308 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 392 selfloop transitions, 99 changer transitions 0/498 dead transitions. [2024-06-21 20:05:21,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 498 transitions, 7595 flow [2024-06-21 20:05:21,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 20:05:21,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-21 20:05:21,309 INFO L175 Difference]: Start difference. First operand has 372 places, 473 transitions, 6551 flow. Second operand 8 states and 190 transitions. [2024-06-21 20:05:21,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 498 transitions, 7595 flow [2024-06-21 20:05:22,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 498 transitions, 7370 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:05:22,370 INFO L231 Difference]: Finished difference. Result has 375 places, 473 transitions, 6529 flow [2024-06-21 20:05:22,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6326, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6529, PETRI_PLACES=375, PETRI_TRANSITIONS=473} [2024-06-21 20:05:22,370 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 334 predicate places. [2024-06-21 20:05:22,370 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 473 transitions, 6529 flow [2024-06-21 20:05:22,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:22,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:22,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:22,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 20:05:22,371 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:22,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:22,371 INFO L85 PathProgramCache]: Analyzing trace with hash 268709779, now seen corresponding path program 3 times [2024-06-21 20:05:22,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:22,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147462116] [2024-06-21 20:05:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:22,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:22,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:22,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147462116] [2024-06-21 20:05:22,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147462116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:22,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:22,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:22,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668815958] [2024-06-21 20:05:22,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:22,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:22,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:22,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:22,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:22,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:22,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 473 transitions, 6529 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:22,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:22,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:22,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:23,322 INFO L124 PetriNetUnfolderBase]: 2976/5027 cut-off events. [2024-06-21 20:05:23,322 INFO L125 PetriNetUnfolderBase]: For 326699/326702 co-relation queries the response was YES. [2024-06-21 20:05:23,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33636 conditions, 5027 events. 2976/5027 cut-off events. For 326699/326702 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 33334 event pairs, 592 based on Foata normal form. 4/5024 useless extension candidates. Maximal degree in co-relation 33474. Up to 4524 conditions per place. [2024-06-21 20:05:23,391 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 440 selfloop transitions, 50 changer transitions 0/497 dead transitions. [2024-06-21 20:05:23,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 497 transitions, 7614 flow [2024-06-21 20:05:23,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:23,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 20:05:23,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-21 20:05:23,392 INFO L175 Difference]: Start difference. First operand has 375 places, 473 transitions, 6529 flow. Second operand 8 states and 183 transitions. [2024-06-21 20:05:23,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 497 transitions, 7614 flow [2024-06-21 20:05:24,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 497 transitions, 7387 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 20:05:24,433 INFO L231 Difference]: Finished difference. Result has 377 places, 475 transitions, 6462 flow [2024-06-21 20:05:24,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6302, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6462, PETRI_PLACES=377, PETRI_TRANSITIONS=475} [2024-06-21 20:05:24,433 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-21 20:05:24,433 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 475 transitions, 6462 flow [2024-06-21 20:05:24,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:24,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:24,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:24,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 20:05:24,434 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:24,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:24,434 INFO L85 PathProgramCache]: Analyzing trace with hash -22076204, now seen corresponding path program 7 times [2024-06-21 20:05:24,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:24,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515552181] [2024-06-21 20:05:24,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:24,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:24,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:24,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515552181] [2024-06-21 20:05:24,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515552181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:24,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:24,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:24,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134976956] [2024-06-21 20:05:24,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:24,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:24,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:24,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:24,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:24,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:24,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 475 transitions, 6462 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:24,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:24,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:24,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:25,371 INFO L124 PetriNetUnfolderBase]: 2989/5056 cut-off events. [2024-06-21 20:05:25,372 INFO L125 PetriNetUnfolderBase]: For 335463/335475 co-relation queries the response was YES. [2024-06-21 20:05:25,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33726 conditions, 5056 events. 2989/5056 cut-off events. For 335463/335475 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 33641 event pairs, 657 based on Foata normal form. 11/5059 useless extension candidates. Maximal degree in co-relation 33563. Up to 4135 conditions per place. [2024-06-21 20:05:25,443 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 310 selfloop transitions, 186 changer transitions 0/503 dead transitions. [2024-06-21 20:05:25,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 503 transitions, 7884 flow [2024-06-21 20:05:25,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:25,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:25,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 20:05:25,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-21 20:05:25,444 INFO L175 Difference]: Start difference. First operand has 377 places, 475 transitions, 6462 flow. Second operand 7 states and 169 transitions. [2024-06-21 20:05:25,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 503 transitions, 7884 flow [2024-06-21 20:05:26,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 503 transitions, 7751 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 20:05:26,646 INFO L231 Difference]: Finished difference. Result has 378 places, 481 transitions, 6760 flow [2024-06-21 20:05:26,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6329, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6760, PETRI_PLACES=378, PETRI_TRANSITIONS=481} [2024-06-21 20:05:26,647 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 337 predicate places. [2024-06-21 20:05:26,647 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 481 transitions, 6760 flow [2024-06-21 20:05:26,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:26,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:26,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:26,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 20:05:26,647 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:26,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:26,648 INFO L85 PathProgramCache]: Analyzing trace with hash 204852490, now seen corresponding path program 8 times [2024-06-21 20:05:26,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:26,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856786521] [2024-06-21 20:05:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:26,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:26,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:26,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856786521] [2024-06-21 20:05:26,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856786521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:26,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:26,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:26,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519378887] [2024-06-21 20:05:26,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:26,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:26,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:26,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:26,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:26,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:26,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 481 transitions, 6760 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:26,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:26,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:26,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:27,591 INFO L124 PetriNetUnfolderBase]: 2994/5066 cut-off events. [2024-06-21 20:05:27,592 INFO L125 PetriNetUnfolderBase]: For 344451/344466 co-relation queries the response was YES. [2024-06-21 20:05:27,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34172 conditions, 5066 events. 2994/5066 cut-off events. For 344451/344466 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 33726 event pairs, 619 based on Foata normal form. 13/5073 useless extension candidates. Maximal degree in co-relation 34008. Up to 4141 conditions per place. [2024-06-21 20:05:27,667 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 306 selfloop transitions, 201 changer transitions 0/514 dead transitions. [2024-06-21 20:05:27,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 514 transitions, 8202 flow [2024-06-21 20:05:27,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:05:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:05:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-21 20:05:27,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-06-21 20:05:27,668 INFO L175 Difference]: Start difference. First operand has 378 places, 481 transitions, 6760 flow. Second operand 9 states and 214 transitions. [2024-06-21 20:05:27,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 514 transitions, 8202 flow [2024-06-21 20:05:28,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 514 transitions, 7981 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:05:28,662 INFO L231 Difference]: Finished difference. Result has 384 places, 484 transitions, 6975 flow [2024-06-21 20:05:28,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6542, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6975, PETRI_PLACES=384, PETRI_TRANSITIONS=484} [2024-06-21 20:05:28,662 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 343 predicate places. [2024-06-21 20:05:28,662 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 484 transitions, 6975 flow [2024-06-21 20:05:28,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:28,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:28,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:28,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 20:05:28,663 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:28,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:28,663 INFO L85 PathProgramCache]: Analyzing trace with hash 42343360, now seen corresponding path program 9 times [2024-06-21 20:05:28,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:28,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772302869] [2024-06-21 20:05:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:28,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:28,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:28,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772302869] [2024-06-21 20:05:28,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772302869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:28,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:28,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:28,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583931031] [2024-06-21 20:05:28,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:28,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:28,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:28,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:28,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:28,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:28,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 484 transitions, 6975 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:28,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:28,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:28,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:29,647 INFO L124 PetriNetUnfolderBase]: 2999/5075 cut-off events. [2024-06-21 20:05:29,647 INFO L125 PetriNetUnfolderBase]: For 352595/352610 co-relation queries the response was YES. [2024-06-21 20:05:29,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34469 conditions, 5075 events. 2999/5075 cut-off events. For 352595/352610 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 33835 event pairs, 629 based on Foata normal form. 13/5082 useless extension candidates. Maximal degree in co-relation 34304. Up to 4448 conditions per place. [2024-06-21 20:05:29,717 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 407 selfloop transitions, 93 changer transitions 0/507 dead transitions. [2024-06-21 20:05:29,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 507 transitions, 8236 flow [2024-06-21 20:05:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:05:29,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:05:29,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-21 20:05:29,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-21 20:05:29,718 INFO L175 Difference]: Start difference. First operand has 384 places, 484 transitions, 6975 flow. Second operand 9 states and 199 transitions. [2024-06-21 20:05:29,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 507 transitions, 8236 flow [2024-06-21 20:05:30,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 507 transitions, 7758 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 20:05:30,786 INFO L231 Difference]: Finished difference. Result has 385 places, 487 transitions, 6736 flow [2024-06-21 20:05:30,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6503, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6736, PETRI_PLACES=385, PETRI_TRANSITIONS=487} [2024-06-21 20:05:30,786 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 344 predicate places. [2024-06-21 20:05:30,787 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 487 transitions, 6736 flow [2024-06-21 20:05:30,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:30,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:30,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:30,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 20:05:30,787 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:30,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:30,787 INFO L85 PathProgramCache]: Analyzing trace with hash 214118080, now seen corresponding path program 10 times [2024-06-21 20:05:30,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:30,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464172049] [2024-06-21 20:05:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:30,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:30,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:30,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464172049] [2024-06-21 20:05:30,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464172049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:30,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:30,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:30,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677284991] [2024-06-21 20:05:30,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:30,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:30,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:30,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:30,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:30,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:30,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 487 transitions, 6736 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:30,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:30,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:30,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:31,796 INFO L124 PetriNetUnfolderBase]: 3004/5084 cut-off events. [2024-06-21 20:05:31,796 INFO L125 PetriNetUnfolderBase]: For 358990/359005 co-relation queries the response was YES. [2024-06-21 20:05:31,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34213 conditions, 5084 events. 3004/5084 cut-off events. For 358990/359005 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 33918 event pairs, 621 based on Foata normal form. 13/5091 useless extension candidates. Maximal degree in co-relation 34047. Up to 4153 conditions per place. [2024-06-21 20:05:31,870 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 287 selfloop transitions, 225 changer transitions 0/519 dead transitions. [2024-06-21 20:05:31,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 519 transitions, 8189 flow [2024-06-21 20:05:31,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:05:31,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:05:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-21 20:05:31,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5659090909090909 [2024-06-21 20:05:31,871 INFO L175 Difference]: Start difference. First operand has 385 places, 487 transitions, 6736 flow. Second operand 11 states and 249 transitions. [2024-06-21 20:05:31,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 519 transitions, 8189 flow [2024-06-21 20:05:33,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 519 transitions, 7962 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 20:05:33,075 INFO L231 Difference]: Finished difference. Result has 388 places, 490 transitions, 6988 flow [2024-06-21 20:05:33,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6509, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6988, PETRI_PLACES=388, PETRI_TRANSITIONS=490} [2024-06-21 20:05:33,075 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 347 predicate places. [2024-06-21 20:05:33,075 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 490 transitions, 6988 flow [2024-06-21 20:05:33,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:33,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:33,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:33,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 20:05:33,076 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:33,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:33,076 INFO L85 PathProgramCache]: Analyzing trace with hash 214106920, now seen corresponding path program 11 times [2024-06-21 20:05:33,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:33,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267139192] [2024-06-21 20:05:33,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:33,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:33,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:33,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267139192] [2024-06-21 20:05:33,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267139192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:33,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:33,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:33,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184046594] [2024-06-21 20:05:33,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:33,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:33,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:33,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:33,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:33,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:33,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 490 transitions, 6988 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:33,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:33,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:33,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:34,042 INFO L124 PetriNetUnfolderBase]: 3001/5080 cut-off events. [2024-06-21 20:05:34,043 INFO L125 PetriNetUnfolderBase]: For 363323/363338 co-relation queries the response was YES. [2024-06-21 20:05:34,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34567 conditions, 5080 events. 3001/5080 cut-off events. For 363323/363338 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 33852 event pairs, 629 based on Foata normal form. 13/5087 useless extension candidates. Maximal degree in co-relation 34400. Up to 4150 conditions per place. [2024-06-21 20:05:34,114 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 296 selfloop transitions, 214 changer transitions 0/517 dead transitions. [2024-06-21 20:05:34,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 517 transitions, 8244 flow [2024-06-21 20:05:34,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:05:34,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:05:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-21 20:05:34,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:05:34,116 INFO L175 Difference]: Start difference. First operand has 388 places, 490 transitions, 6988 flow. Second operand 10 states and 230 transitions. [2024-06-21 20:05:34,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 517 transitions, 8244 flow [2024-06-21 20:05:35,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 517 transitions, 7774 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 20:05:35,501 INFO L231 Difference]: Finished difference. Result has 389 places, 490 transitions, 6955 flow [2024-06-21 20:05:35,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6518, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6955, PETRI_PLACES=389, PETRI_TRANSITIONS=490} [2024-06-21 20:05:35,501 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-21 20:05:35,501 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 490 transitions, 6955 flow [2024-06-21 20:05:35,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:35,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:35,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:35,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 20:05:35,502 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:35,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:35,502 INFO L85 PathProgramCache]: Analyzing trace with hash 42337780, now seen corresponding path program 12 times [2024-06-21 20:05:35,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:35,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282603766] [2024-06-21 20:05:35,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:35,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:35,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:35,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282603766] [2024-06-21 20:05:35,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282603766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:35,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:35,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:35,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526763665] [2024-06-21 20:05:35,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:35,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:35,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:35,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:35,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:35,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:35,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 490 transitions, 6955 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:35,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:35,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:35,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:36,524 INFO L124 PetriNetUnfolderBase]: 2998/5076 cut-off events. [2024-06-21 20:05:36,524 INFO L125 PetriNetUnfolderBase]: For 367106/367121 co-relation queries the response was YES. [2024-06-21 20:05:36,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34531 conditions, 5076 events. 2998/5076 cut-off events. For 367106/367121 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 33876 event pairs, 629 based on Foata normal form. 13/5083 useless extension candidates. Maximal degree in co-relation 34363. Up to 4448 conditions per place. [2024-06-21 20:05:36,587 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 410 selfloop transitions, 90 changer transitions 0/507 dead transitions. [2024-06-21 20:05:36,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 507 transitions, 7997 flow [2024-06-21 20:05:36,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:36,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 20:05:36,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-21 20:05:36,588 INFO L175 Difference]: Start difference. First operand has 389 places, 490 transitions, 6955 flow. Second operand 7 states and 163 transitions. [2024-06-21 20:05:36,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 507 transitions, 7997 flow [2024-06-21 20:05:37,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 507 transitions, 7556 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 20:05:37,985 INFO L231 Difference]: Finished difference. Result has 387 places, 490 transitions, 6701 flow [2024-06-21 20:05:37,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6514, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6701, PETRI_PLACES=387, PETRI_TRANSITIONS=490} [2024-06-21 20:05:37,985 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 346 predicate places. [2024-06-21 20:05:37,985 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 490 transitions, 6701 flow [2024-06-21 20:05:37,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:37,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:37,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:37,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 20:05:37,986 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:37,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:37,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1612785100, now seen corresponding path program 13 times [2024-06-21 20:05:37,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:37,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939306410] [2024-06-21 20:05:37,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:37,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:38,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:38,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939306410] [2024-06-21 20:05:38,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939306410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:38,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:38,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:38,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820453780] [2024-06-21 20:05:38,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:38,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:38,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:38,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:38,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:38,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:38,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 490 transitions, 6701 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:38,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:38,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:38,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:38,984 INFO L124 PetriNetUnfolderBase]: 3011/5098 cut-off events. [2024-06-21 20:05:38,985 INFO L125 PetriNetUnfolderBase]: For 378600/378615 co-relation queries the response was YES. [2024-06-21 20:05:39,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34414 conditions, 5098 events. 3011/5098 cut-off events. For 378600/378615 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34018 event pairs, 617 based on Foata normal form. 13/5105 useless extension candidates. Maximal degree in co-relation 34245. Up to 4246 conditions per place. [2024-06-21 20:05:39,059 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 309 selfloop transitions, 205 changer transitions 0/521 dead transitions. [2024-06-21 20:05:39,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 521 transitions, 8201 flow [2024-06-21 20:05:39,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:05:39,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:05:39,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-21 20:05:39,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:05:39,059 INFO L175 Difference]: Start difference. First operand has 387 places, 490 transitions, 6701 flow. Second operand 10 states and 230 transitions. [2024-06-21 20:05:39,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 521 transitions, 8201 flow [2024-06-21 20:05:40,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 521 transitions, 8021 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:05:40,385 INFO L231 Difference]: Finished difference. Result has 391 places, 496 transitions, 7001 flow [2024-06-21 20:05:40,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6521, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7001, PETRI_PLACES=391, PETRI_TRANSITIONS=496} [2024-06-21 20:05:40,385 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 350 predicate places. [2024-06-21 20:05:40,385 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 496 transitions, 7001 flow [2024-06-21 20:05:40,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:40,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:40,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:40,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 20:05:40,385 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:40,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:40,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1612969240, now seen corresponding path program 14 times [2024-06-21 20:05:40,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:40,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725622985] [2024-06-21 20:05:40,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:40,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:40,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:40,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725622985] [2024-06-21 20:05:40,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725622985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:40,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:40,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:40,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942660438] [2024-06-21 20:05:40,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:40,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:40,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:40,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:40,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:40,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:40,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 496 transitions, 7001 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:40,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:40,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:40,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:41,366 INFO L124 PetriNetUnfolderBase]: 3016/5107 cut-off events. [2024-06-21 20:05:41,366 INFO L125 PetriNetUnfolderBase]: For 388062/388077 co-relation queries the response was YES. [2024-06-21 20:05:41,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34856 conditions, 5107 events. 3016/5107 cut-off events. For 388062/388077 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34181 event pairs, 619 based on Foata normal form. 13/5114 useless extension candidates. Maximal degree in co-relation 34686. Up to 4252 conditions per place. [2024-06-21 20:05:41,438 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 336 selfloop transitions, 181 changer transitions 0/524 dead transitions. [2024-06-21 20:05:41,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 524 transitions, 8484 flow [2024-06-21 20:05:41,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:05:41,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-21 20:05:41,439 INFO L175 Difference]: Start difference. First operand has 391 places, 496 transitions, 7001 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:05:41,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 524 transitions, 8484 flow [2024-06-21 20:05:42,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 524 transitions, 8062 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 20:05:42,971 INFO L231 Difference]: Finished difference. Result has 391 places, 499 transitions, 6987 flow [2024-06-21 20:05:42,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6585, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6987, PETRI_PLACES=391, PETRI_TRANSITIONS=499} [2024-06-21 20:05:42,971 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 350 predicate places. [2024-06-21 20:05:42,972 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 499 transitions, 6987 flow [2024-06-21 20:05:42,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:42,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:42,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:42,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 20:05:42,972 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:42,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:42,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1613142220, now seen corresponding path program 15 times [2024-06-21 20:05:42,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:42,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362031508] [2024-06-21 20:05:42,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:42,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:43,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:43,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362031508] [2024-06-21 20:05:43,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362031508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:43,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:43,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:43,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768670710] [2024-06-21 20:05:43,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:43,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:43,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:43,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:43,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:43,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:43,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 499 transitions, 6987 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:43,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:43,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:43,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:43,939 INFO L124 PetriNetUnfolderBase]: 3013/5103 cut-off events. [2024-06-21 20:05:43,939 INFO L125 PetriNetUnfolderBase]: For 391961/391976 co-relation queries the response was YES. [2024-06-21 20:05:43,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34802 conditions, 5103 events. 3013/5103 cut-off events. For 391961/391976 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34077 event pairs, 619 based on Foata normal form. 13/5110 useless extension candidates. Maximal degree in co-relation 34631. Up to 4249 conditions per place. [2024-06-21 20:05:44,012 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 339 selfloop transitions, 182 changer transitions 0/528 dead transitions. [2024-06-21 20:05:44,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 528 transitions, 8457 flow [2024-06-21 20:05:44,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 20:05:44,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:05:44,013 INFO L175 Difference]: Start difference. First operand has 391 places, 499 transitions, 6987 flow. Second operand 8 states and 196 transitions. [2024-06-21 20:05:44,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 528 transitions, 8457 flow [2024-06-21 20:05:45,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 528 transitions, 7995 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 20:05:45,543 INFO L231 Difference]: Finished difference. Result has 393 places, 499 transitions, 6904 flow [2024-06-21 20:05:45,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6525, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6904, PETRI_PLACES=393, PETRI_TRANSITIONS=499} [2024-06-21 20:05:45,543 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 352 predicate places. [2024-06-21 20:05:45,543 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 499 transitions, 6904 flow [2024-06-21 20:05:45,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:45,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:45,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:45,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 20:05:45,543 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:45,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:45,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1613136640, now seen corresponding path program 16 times [2024-06-21 20:05:45,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:45,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121749408] [2024-06-21 20:05:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:45,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:45,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:45,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121749408] [2024-06-21 20:05:45,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121749408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:45,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:45,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:45,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108474351] [2024-06-21 20:05:45,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:45,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:45,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:45,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:45,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:45,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:45,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 499 transitions, 6904 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:45,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:45,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:45,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:46,555 INFO L124 PetriNetUnfolderBase]: 3018/5112 cut-off events. [2024-06-21 20:05:46,555 INFO L125 PetriNetUnfolderBase]: For 398111/398126 co-relation queries the response was YES. [2024-06-21 20:05:46,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34869 conditions, 5112 events. 3018/5112 cut-off events. For 398111/398126 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 34200 event pairs, 629 based on Foata normal form. 13/5119 useless extension candidates. Maximal degree in co-relation 34697. Up to 4255 conditions per place. [2024-06-21 20:05:46,627 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 320 selfloop transitions, 201 changer transitions 0/528 dead transitions. [2024-06-21 20:05:46,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 528 transitions, 8228 flow [2024-06-21 20:05:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:05:46,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:05:46,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-21 20:05:46,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-21 20:05:46,628 INFO L175 Difference]: Start difference. First operand has 393 places, 499 transitions, 6904 flow. Second operand 9 states and 209 transitions. [2024-06-21 20:05:46,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 528 transitions, 8228 flow [2024-06-21 20:05:48,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 528 transitions, 7861 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 20:05:48,315 INFO L231 Difference]: Finished difference. Result has 395 places, 502 transitions, 6989 flow [2024-06-21 20:05:48,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6545, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6989, PETRI_PLACES=395, PETRI_TRANSITIONS=502} [2024-06-21 20:05:48,316 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 354 predicate places. [2024-06-21 20:05:48,316 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 502 transitions, 6989 flow [2024-06-21 20:05:48,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:48,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:48,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:48,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 20:05:48,316 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:48,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:48,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1612958080, now seen corresponding path program 17 times [2024-06-21 20:05:48,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:48,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299579082] [2024-06-21 20:05:48,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:48,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:48,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:48,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299579082] [2024-06-21 20:05:48,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299579082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:48,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:48,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:48,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527963927] [2024-06-21 20:05:48,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:48,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:48,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:48,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:48,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:48,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:48,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 502 transitions, 6989 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:48,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:48,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:48,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:49,277 INFO L124 PetriNetUnfolderBase]: 3015/5108 cut-off events. [2024-06-21 20:05:49,278 INFO L125 PetriNetUnfolderBase]: For 393961/393976 co-relation queries the response was YES. [2024-06-21 20:05:49,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34814 conditions, 5108 events. 3015/5108 cut-off events. For 393961/393976 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 34229 event pairs, 629 based on Foata normal form. 13/5115 useless extension candidates. Maximal degree in co-relation 34642. Up to 4252 conditions per place. [2024-06-21 20:05:49,356 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 327 selfloop transitions, 189 changer transitions 0/523 dead transitions. [2024-06-21 20:05:49,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 523 transitions, 8253 flow [2024-06-21 20:05:49,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:05:49,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:05:49,357 INFO L175 Difference]: Start difference. First operand has 395 places, 502 transitions, 6989 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:05:49,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 523 transitions, 8253 flow [2024-06-21 20:05:50,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 523 transitions, 7936 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 20:05:50,960 INFO L231 Difference]: Finished difference. Result has 395 places, 502 transitions, 7058 flow [2024-06-21 20:05:50,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6674, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7058, PETRI_PLACES=395, PETRI_TRANSITIONS=502} [2024-06-21 20:05:50,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 354 predicate places. [2024-06-21 20:05:50,961 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 502 transitions, 7058 flow [2024-06-21 20:05:50,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:50,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:50,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:50,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 20:05:50,961 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:50,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:50,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1612790680, now seen corresponding path program 18 times [2024-06-21 20:05:50,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:50,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218592858] [2024-06-21 20:05:50,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:50,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:51,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:51,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218592858] [2024-06-21 20:05:51,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218592858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:51,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:51,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:51,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701602817] [2024-06-21 20:05:51,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:51,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:51,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:51,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:51,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:51,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:51,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 502 transitions, 7058 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:51,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:51,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:51,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:51,989 INFO L124 PetriNetUnfolderBase]: 3012/5104 cut-off events. [2024-06-21 20:05:51,989 INFO L125 PetriNetUnfolderBase]: For 390687/390702 co-relation queries the response was YES. [2024-06-21 20:05:52,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34734 conditions, 5104 events. 3012/5104 cut-off events. For 390687/390702 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 34168 event pairs, 625 based on Foata normal form. 13/5111 useless extension candidates. Maximal degree in co-relation 34562. Up to 4249 conditions per place. [2024-06-21 20:05:52,063 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 307 selfloop transitions, 212 changer transitions 0/526 dead transitions. [2024-06-21 20:05:52,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 526 transitions, 8154 flow [2024-06-21 20:05:52,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:05:52,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:05:52,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 245 transitions. [2024-06-21 20:05:52,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-21 20:05:52,064 INFO L175 Difference]: Start difference. First operand has 395 places, 502 transitions, 7058 flow. Second operand 11 states and 245 transitions. [2024-06-21 20:05:52,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 526 transitions, 8154 flow [2024-06-21 20:05:53,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 526 transitions, 7584 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 20:05:53,766 INFO L231 Difference]: Finished difference. Result has 398 places, 502 transitions, 6918 flow [2024-06-21 20:05:53,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6488, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6918, PETRI_PLACES=398, PETRI_TRANSITIONS=502} [2024-06-21 20:05:53,766 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 357 predicate places. [2024-06-21 20:05:53,766 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 502 transitions, 6918 flow [2024-06-21 20:05:53,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:53,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:53,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:53,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 20:05:53,767 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:53,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:53,767 INFO L85 PathProgramCache]: Analyzing trace with hash -889043035, now seen corresponding path program 4 times [2024-06-21 20:05:53,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:53,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993557145] [2024-06-21 20:05:53,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:53,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:53,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:53,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:53,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993557145] [2024-06-21 20:05:53,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993557145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:53,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:53,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:53,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692699051] [2024-06-21 20:05:53,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:53,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:53,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:53,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:53,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:53,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:53,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 502 transitions, 6918 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:53,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:53,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:53,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:54,760 INFO L124 PetriNetUnfolderBase]: 3020/5110 cut-off events. [2024-06-21 20:05:54,761 INFO L125 PetriNetUnfolderBase]: For 401792/401795 co-relation queries the response was YES. [2024-06-21 20:05:54,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34843 conditions, 5110 events. 3020/5110 cut-off events. For 401792/401795 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 34106 event pairs, 594 based on Foata normal form. 4/5109 useless extension candidates. Maximal degree in co-relation 34670. Up to 4581 conditions per place. [2024-06-21 20:05:54,833 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 462 selfloop transitions, 55 changer transitions 0/524 dead transitions. [2024-06-21 20:05:54,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 524 transitions, 8055 flow [2024-06-21 20:05:54,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:05:54,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:05:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-21 20:05:54,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-21 20:05:54,834 INFO L175 Difference]: Start difference. First operand has 398 places, 502 transitions, 6918 flow. Second operand 9 states and 197 transitions. [2024-06-21 20:05:54,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 524 transitions, 8055 flow [2024-06-21 20:05:56,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 524 transitions, 7385 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-21 20:05:56,287 INFO L231 Difference]: Finished difference. Result has 394 places, 504 transitions, 6422 flow [2024-06-21 20:05:56,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6248, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6422, PETRI_PLACES=394, PETRI_TRANSITIONS=504} [2024-06-21 20:05:56,287 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 353 predicate places. [2024-06-21 20:05:56,287 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 504 transitions, 6422 flow [2024-06-21 20:05:56,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:56,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:56,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:56,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 20:05:56,288 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:56,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:56,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1910822460, now seen corresponding path program 19 times [2024-06-21 20:05:56,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:56,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455599144] [2024-06-21 20:05:56,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:56,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:56,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:56,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455599144] [2024-06-21 20:05:56,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455599144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:56,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:56,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:56,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006519236] [2024-06-21 20:05:56,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:56,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:56,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:56,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:56,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:56,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:56,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 504 transitions, 6422 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:56,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:56,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:56,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:57,289 INFO L124 PetriNetUnfolderBase]: 3033/5138 cut-off events. [2024-06-21 20:05:57,289 INFO L125 PetriNetUnfolderBase]: For 408972/408987 co-relation queries the response was YES. [2024-06-21 20:05:57,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34561 conditions, 5138 events. 3033/5138 cut-off events. For 408972/408987 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 34385 event pairs, 619 based on Foata normal form. 13/5145 useless extension candidates. Maximal degree in co-relation 34387. Up to 4181 conditions per place. [2024-06-21 20:05:57,360 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 262 selfloop transitions, 269 changer transitions 0/538 dead transitions. [2024-06-21 20:05:57,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 538 transitions, 7974 flow [2024-06-21 20:05:57,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:05:57,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:05:57,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-21 20:05:57,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-06-21 20:05:57,361 INFO L175 Difference]: Start difference. First operand has 394 places, 504 transitions, 6422 flow. Second operand 10 states and 228 transitions. [2024-06-21 20:05:57,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 538 transitions, 7974 flow [2024-06-21 20:05:58,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 538 transitions, 7827 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 20:05:58,847 INFO L231 Difference]: Finished difference. Result has 397 places, 510 transitions, 6877 flow [2024-06-21 20:05:58,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6275, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6877, PETRI_PLACES=397, PETRI_TRANSITIONS=510} [2024-06-21 20:05:58,848 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 356 predicate places. [2024-06-21 20:05:58,848 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 510 transitions, 6877 flow [2024-06-21 20:05:58,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:58,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:58,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:58,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 20:05:58,848 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:05:58,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:58,848 INFO L85 PathProgramCache]: Analyzing trace with hash 402435752, now seen corresponding path program 20 times [2024-06-21 20:05:58,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:58,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375198059] [2024-06-21 20:05:58,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:58,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:58,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:58,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375198059] [2024-06-21 20:05:58,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375198059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:58,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:58,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:58,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872953052] [2024-06-21 20:05:58,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:58,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:58,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:58,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:58,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:58,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:58,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 510 transitions, 6877 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:58,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:58,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:58,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:59,859 INFO L124 PetriNetUnfolderBase]: 3030/5131 cut-off events. [2024-06-21 20:05:59,859 INFO L125 PetriNetUnfolderBase]: For 414329/414338 co-relation queries the response was YES. [2024-06-21 20:05:59,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35026 conditions, 5131 events. 3030/5131 cut-off events. For 414329/414338 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 34309 event pairs, 654 based on Foata normal form. 5/5128 useless extension candidates. Maximal degree in co-relation 34851. Up to 4178 conditions per place. [2024-06-21 20:05:59,930 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 252 selfloop transitions, 269 changer transitions 0/528 dead transitions. [2024-06-21 20:05:59,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 528 transitions, 8147 flow [2024-06-21 20:05:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:05:59,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:05:59,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-21 20:05:59,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 20:05:59,931 INFO L175 Difference]: Start difference. First operand has 397 places, 510 transitions, 6877 flow. Second operand 10 states and 220 transitions. [2024-06-21 20:05:59,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 528 transitions, 8147 flow [2024-06-21 20:06:01,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 528 transitions, 7763 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 20:06:01,496 INFO L231 Difference]: Finished difference. Result has 400 places, 510 transitions, 7039 flow [2024-06-21 20:06:01,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6495, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7039, PETRI_PLACES=400, PETRI_TRANSITIONS=510} [2024-06-21 20:06:01,496 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 359 predicate places. [2024-06-21 20:06:01,496 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 510 transitions, 7039 flow [2024-06-21 20:06:01,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:01,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:01,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:01,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 20:06:01,497 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:01,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:01,497 INFO L85 PathProgramCache]: Analyzing trace with hash 62610962, now seen corresponding path program 21 times [2024-06-21 20:06:01,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:01,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412860929] [2024-06-21 20:06:01,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:01,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:01,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:01,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412860929] [2024-06-21 20:06:01,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412860929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:01,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:01,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:01,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696713536] [2024-06-21 20:06:01,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:01,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:01,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:01,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:01,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:01,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:01,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 510 transitions, 7039 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:01,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:01,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:01,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:02,491 INFO L124 PetriNetUnfolderBase]: 3035/5143 cut-off events. [2024-06-21 20:06:02,491 INFO L125 PetriNetUnfolderBase]: For 413880/413895 co-relation queries the response was YES. [2024-06-21 20:06:02,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35150 conditions, 5143 events. 3035/5143 cut-off events. For 413880/413895 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 34431 event pairs, 629 based on Foata normal form. 13/5150 useless extension candidates. Maximal degree in co-relation 34975. Up to 4184 conditions per place. [2024-06-21 20:06:02,569 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 288 selfloop transitions, 250 changer transitions 0/545 dead transitions. [2024-06-21 20:06:02,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 545 transitions, 8413 flow [2024-06-21 20:06:02,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:06:02,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:06:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-21 20:06:02,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-21 20:06:02,570 INFO L175 Difference]: Start difference. First operand has 400 places, 510 transitions, 7039 flow. Second operand 9 states and 218 transitions. [2024-06-21 20:06:02,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 545 transitions, 8413 flow [2024-06-21 20:06:04,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 545 transitions, 7652 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 20:06:04,058 INFO L231 Difference]: Finished difference. Result has 399 places, 513 transitions, 6825 flow [2024-06-21 20:06:04,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6287, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6825, PETRI_PLACES=399, PETRI_TRANSITIONS=513} [2024-06-21 20:06:04,058 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 358 predicate places. [2024-06-21 20:06:04,058 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 513 transitions, 6825 flow [2024-06-21 20:06:04,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:04,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:04,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:04,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 20:06:04,058 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:04,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:04,059 INFO L85 PathProgramCache]: Analyzing trace with hash 62616542, now seen corresponding path program 22 times [2024-06-21 20:06:04,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:04,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877952881] [2024-06-21 20:06:04,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:04,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:04,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:04,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877952881] [2024-06-21 20:06:04,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877952881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:04,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:04,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:04,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055299534] [2024-06-21 20:06:04,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:04,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:04,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:04,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:04,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:04,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:04,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 513 transitions, 6825 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:04,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:04,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:04,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:05,135 INFO L124 PetriNetUnfolderBase]: 3032/5139 cut-off events. [2024-06-21 20:06:05,135 INFO L125 PetriNetUnfolderBase]: For 417863/417878 co-relation queries the response was YES. [2024-06-21 20:06:05,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34971 conditions, 5139 events. 3032/5139 cut-off events. For 417863/417878 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 34427 event pairs, 619 based on Foata normal form. 13/5146 useless extension candidates. Maximal degree in co-relation 34795. Up to 4181 conditions per place. [2024-06-21 20:06:05,203 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 285 selfloop transitions, 254 changer transitions 0/546 dead transitions. [2024-06-21 20:06:05,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 546 transitions, 7985 flow [2024-06-21 20:06:05,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:06:05,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:06:05,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-21 20:06:05,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:06:05,204 INFO L175 Difference]: Start difference. First operand has 399 places, 513 transitions, 6825 flow. Second operand 11 states and 253 transitions. [2024-06-21 20:06:05,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 546 transitions, 7985 flow [2024-06-21 20:06:06,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 546 transitions, 7477 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 20:06:06,630 INFO L231 Difference]: Finished difference. Result has 401 places, 513 transitions, 6839 flow [2024-06-21 20:06:06,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6317, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6839, PETRI_PLACES=401, PETRI_TRANSITIONS=513} [2024-06-21 20:06:06,630 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 360 predicate places. [2024-06-21 20:06:06,630 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 513 transitions, 6839 flow [2024-06-21 20:06:06,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:06,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:06,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:06,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 20:06:06,630 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:06,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:06,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1081811187, now seen corresponding path program 5 times [2024-06-21 20:06:06,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:06,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468710172] [2024-06-21 20:06:06,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:06,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:06,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:06,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468710172] [2024-06-21 20:06:06,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468710172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:06,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:06,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:06,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731825818] [2024-06-21 20:06:06,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:06,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:06,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:06,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:06,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:06,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:06,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 513 transitions, 6839 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:06,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:06,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:06,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:07,626 INFO L124 PetriNetUnfolderBase]: 3158/5323 cut-off events. [2024-06-21 20:06:07,626 INFO L125 PetriNetUnfolderBase]: For 502890/502905 co-relation queries the response was YES. [2024-06-21 20:06:07,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38260 conditions, 5323 events. 3158/5323 cut-off events. For 502890/502905 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 35534 event pairs, 663 based on Foata normal form. 14/5330 useless extension candidates. Maximal degree in co-relation 38085. Up to 4537 conditions per place. [2024-06-21 20:06:07,705 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 451 selfloop transitions, 87 changer transitions 0/545 dead transitions. [2024-06-21 20:06:07,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 545 transitions, 8330 flow [2024-06-21 20:06:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:07,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:06:07,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:06:07,706 INFO L175 Difference]: Start difference. First operand has 401 places, 513 transitions, 6839 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:06:07,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 545 transitions, 8330 flow [2024-06-21 20:06:09,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 545 transitions, 7718 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 20:06:09,467 INFO L231 Difference]: Finished difference. Result has 396 places, 519 transitions, 6579 flow [2024-06-21 20:06:09,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6231, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6579, PETRI_PLACES=396, PETRI_TRANSITIONS=519} [2024-06-21 20:06:09,468 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 355 predicate places. [2024-06-21 20:06:09,468 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 519 transitions, 6579 flow [2024-06-21 20:06:09,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:09,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:09,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:09,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 20:06:09,468 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:09,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:09,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1084668147, now seen corresponding path program 6 times [2024-06-21 20:06:09,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:09,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332408602] [2024-06-21 20:06:09,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:09,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:09,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:09,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332408602] [2024-06-21 20:06:09,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332408602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:09,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:09,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:09,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623742950] [2024-06-21 20:06:09,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:09,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:09,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:09,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:09,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:09,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:09,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 519 transitions, 6579 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:09,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:09,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:09,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:10,588 INFO L124 PetriNetUnfolderBase]: 3166/5341 cut-off events. [2024-06-21 20:06:10,588 INFO L125 PetriNetUnfolderBase]: For 494099/494114 co-relation queries the response was YES. [2024-06-21 20:06:10,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38063 conditions, 5341 events. 3166/5341 cut-off events. For 494099/494114 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 35743 event pairs, 659 based on Foata normal form. 14/5349 useless extension candidates. Maximal degree in co-relation 37888. Up to 4689 conditions per place. [2024-06-21 20:06:10,656 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 450 selfloop transitions, 82 changer transitions 0/539 dead transitions. [2024-06-21 20:06:10,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 539 transitions, 7742 flow [2024-06-21 20:06:10,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:10,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 20:06:10,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-21 20:06:10,657 INFO L175 Difference]: Start difference. First operand has 396 places, 519 transitions, 6579 flow. Second operand 7 states and 162 transitions. [2024-06-21 20:06:10,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 539 transitions, 7742 flow [2024-06-21 20:06:12,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 539 transitions, 7531 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 20:06:12,589 INFO L231 Difference]: Finished difference. Result has 399 places, 521 transitions, 6596 flow [2024-06-21 20:06:12,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6376, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6596, PETRI_PLACES=399, PETRI_TRANSITIONS=521} [2024-06-21 20:06:12,589 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 358 predicate places. [2024-06-21 20:06:12,589 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 521 transitions, 6596 flow [2024-06-21 20:06:12,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:12,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:12,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:12,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 20:06:12,590 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:12,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:12,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1235986139, now seen corresponding path program 7 times [2024-06-21 20:06:12,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:12,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937238029] [2024-06-21 20:06:12,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:12,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:12,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:12,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937238029] [2024-06-21 20:06:12,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937238029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:12,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:12,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:12,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435831663] [2024-06-21 20:06:12,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:12,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:12,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:12,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:12,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:12,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:12,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 521 transitions, 6596 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:12,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:12,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:12,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:13,666 INFO L124 PetriNetUnfolderBase]: 3259/5480 cut-off events. [2024-06-21 20:06:13,667 INFO L125 PetriNetUnfolderBase]: For 566002/566017 co-relation queries the response was YES. [2024-06-21 20:06:13,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40523 conditions, 5480 events. 3259/5480 cut-off events. For 566002/566017 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 36565 event pairs, 547 based on Foata normal form. 14/5488 useless extension candidates. Maximal degree in co-relation 40347. Up to 3744 conditions per place. [2024-06-21 20:06:13,745 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 442 selfloop transitions, 111 changer transitions 0/560 dead transitions. [2024-06-21 20:06:13,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 560 transitions, 8394 flow [2024-06-21 20:06:13,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:13,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:13,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:06:13,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-21 20:06:13,746 INFO L175 Difference]: Start difference. First operand has 399 places, 521 transitions, 6596 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:06:13,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 560 transitions, 8394 flow [2024-06-21 20:06:15,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 560 transitions, 8201 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:06:15,763 INFO L231 Difference]: Finished difference. Result has 402 places, 529 transitions, 6858 flow [2024-06-21 20:06:15,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6403, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6858, PETRI_PLACES=402, PETRI_TRANSITIONS=529} [2024-06-21 20:06:15,763 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 361 predicate places. [2024-06-21 20:06:15,763 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 529 transitions, 6858 flow [2024-06-21 20:06:15,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:15,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:15,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:15,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 20:06:15,764 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:15,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:15,764 INFO L85 PathProgramCache]: Analyzing trace with hash 739920115, now seen corresponding path program 8 times [2024-06-21 20:06:15,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:15,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365099713] [2024-06-21 20:06:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:15,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:15,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:15,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365099713] [2024-06-21 20:06:15,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365099713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:15,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:15,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:15,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156876678] [2024-06-21 20:06:15,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:15,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:15,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:15,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:15,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:15,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:15,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 529 transitions, 6858 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:15,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:15,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:15,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:16,895 INFO L124 PetriNetUnfolderBase]: 3241/5454 cut-off events. [2024-06-21 20:06:16,896 INFO L125 PetriNetUnfolderBase]: For 571669/571684 co-relation queries the response was YES. [2024-06-21 20:06:16,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40268 conditions, 5454 events. 3241/5454 cut-off events. For 571669/571684 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 36446 event pairs, 582 based on Foata normal form. 20/5468 useless extension candidates. Maximal degree in co-relation 40090. Up to 3736 conditions per place. [2024-06-21 20:06:16,966 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 447 selfloop transitions, 104 changer transitions 0/558 dead transitions. [2024-06-21 20:06:16,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 558 transitions, 8444 flow [2024-06-21 20:06:16,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:16,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:16,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 20:06:16,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-21 20:06:16,967 INFO L175 Difference]: Start difference. First operand has 402 places, 529 transitions, 6858 flow. Second operand 7 states and 172 transitions. [2024-06-21 20:06:16,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 558 transitions, 8444 flow [2024-06-21 20:06:18,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 558 transitions, 8246 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 20:06:18,694 INFO L231 Difference]: Finished difference. Result has 406 places, 529 transitions, 6874 flow [2024-06-21 20:06:18,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6660, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6874, PETRI_PLACES=406, PETRI_TRANSITIONS=529} [2024-06-21 20:06:18,698 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 365 predicate places. [2024-06-21 20:06:18,699 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 529 transitions, 6874 flow [2024-06-21 20:06:18,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:18,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:18,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:18,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 20:06:18,699 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:18,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:18,699 INFO L85 PathProgramCache]: Analyzing trace with hash -818079501, now seen corresponding path program 9 times [2024-06-21 20:06:18,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:18,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436421413] [2024-06-21 20:06:18,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:18,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:18,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:18,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436421413] [2024-06-21 20:06:18,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436421413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:18,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:18,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:18,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37741864] [2024-06-21 20:06:18,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:18,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:18,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:18,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:18,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:18,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:18,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 529 transitions, 6874 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:18,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:18,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:18,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:19,720 INFO L124 PetriNetUnfolderBase]: 3218/5421 cut-off events. [2024-06-21 20:06:19,720 INFO L125 PetriNetUnfolderBase]: For 546818/546833 co-relation queries the response was YES. [2024-06-21 20:06:19,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39093 conditions, 5421 events. 3218/5421 cut-off events. For 546818/546833 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 36307 event pairs, 675 based on Foata normal form. 22/5437 useless extension candidates. Maximal degree in co-relation 38914. Up to 4737 conditions per place. [2024-06-21 20:06:19,798 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 461 selfloop transitions, 79 changer transitions 0/547 dead transitions. [2024-06-21 20:06:19,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 547 transitions, 8018 flow [2024-06-21 20:06:19,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:19,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 20:06:19,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-21 20:06:19,799 INFO L175 Difference]: Start difference. First operand has 406 places, 529 transitions, 6874 flow. Second operand 7 states and 163 transitions. [2024-06-21 20:06:19,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 547 transitions, 8018 flow [2024-06-21 20:06:21,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 547 transitions, 7801 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 20:06:21,430 INFO L231 Difference]: Finished difference. Result has 409 places, 529 transitions, 6821 flow [2024-06-21 20:06:21,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6657, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6821, PETRI_PLACES=409, PETRI_TRANSITIONS=529} [2024-06-21 20:06:21,430 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 368 predicate places. [2024-06-21 20:06:21,430 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 529 transitions, 6821 flow [2024-06-21 20:06:21,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:21,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:21,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:21,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 20:06:21,430 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:21,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:21,431 INFO L85 PathProgramCache]: Analyzing trace with hash -809508621, now seen corresponding path program 10 times [2024-06-21 20:06:21,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:21,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287474451] [2024-06-21 20:06:21,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:21,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:21,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:21,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287474451] [2024-06-21 20:06:21,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287474451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:21,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:21,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:21,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366760623] [2024-06-21 20:06:21,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:21,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:21,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:21,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:21,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:21,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:21,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 529 transitions, 6821 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:21,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:21,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:21,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:22,523 INFO L124 PetriNetUnfolderBase]: 3195/5388 cut-off events. [2024-06-21 20:06:22,523 INFO L125 PetriNetUnfolderBase]: For 508076/508091 co-relation queries the response was YES. [2024-06-21 20:06:22,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37564 conditions, 5388 events. 3195/5388 cut-off events. For 508076/508091 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 36137 event pairs, 648 based on Foata normal form. 22/5404 useless extension candidates. Maximal degree in co-relation 37384. Up to 4476 conditions per place. [2024-06-21 20:06:22,595 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 460 selfloop transitions, 85 changer transitions 0/552 dead transitions. [2024-06-21 20:06:22,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 552 transitions, 8199 flow [2024-06-21 20:06:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:22,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 20:06:22,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-21 20:06:22,596 INFO L175 Difference]: Start difference. First operand has 409 places, 529 transitions, 6821 flow. Second operand 7 states and 167 transitions. [2024-06-21 20:06:22,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 552 transitions, 8199 flow [2024-06-21 20:06:24,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 552 transitions, 8021 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:06:24,012 INFO L231 Difference]: Finished difference. Result has 411 places, 529 transitions, 6820 flow [2024-06-21 20:06:24,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6643, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6820, PETRI_PLACES=411, PETRI_TRANSITIONS=529} [2024-06-21 20:06:24,012 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 370 predicate places. [2024-06-21 20:06:24,012 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 529 transitions, 6820 flow [2024-06-21 20:06:24,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:24,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:24,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:24,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 20:06:24,013 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:24,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:24,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1107822315, now seen corresponding path program 11 times [2024-06-21 20:06:24,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:24,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363077774] [2024-06-21 20:06:24,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:24,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:24,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:24,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363077774] [2024-06-21 20:06:24,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363077774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:24,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:24,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:24,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204362655] [2024-06-21 20:06:24,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:24,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:24,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:24,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:24,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:24,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:24,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 529 transitions, 6820 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:24,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:24,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:24,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:25,037 INFO L124 PetriNetUnfolderBase]: 3183/5339 cut-off events. [2024-06-21 20:06:25,037 INFO L125 PetriNetUnfolderBase]: For 470815/470815 co-relation queries the response was YES. [2024-06-21 20:06:25,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37278 conditions, 5339 events. 3183/5339 cut-off events. For 470815/470815 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 35520 event pairs, 627 based on Foata normal form. 2/5324 useless extension candidates. Maximal degree in co-relation 37097. Up to 4523 conditions per place. [2024-06-21 20:06:25,114 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 435 selfloop transitions, 116 changer transitions 0/558 dead transitions. [2024-06-21 20:06:25,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 558 transitions, 8208 flow [2024-06-21 20:06:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:06:25,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:06:25,115 INFO L175 Difference]: Start difference. First operand has 411 places, 529 transitions, 6820 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:06:25,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 558 transitions, 8208 flow [2024-06-21 20:06:26,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 558 transitions, 8023 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 20:06:26,630 INFO L231 Difference]: Finished difference. Result has 414 places, 529 transitions, 6875 flow [2024-06-21 20:06:26,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6635, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6875, PETRI_PLACES=414, PETRI_TRANSITIONS=529} [2024-06-21 20:06:26,631 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 373 predicate places. [2024-06-21 20:06:26,631 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 529 transitions, 6875 flow [2024-06-21 20:06:26,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:26,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:26,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:26,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 20:06:26,631 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:26,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:26,631 INFO L85 PathProgramCache]: Analyzing trace with hash 254437967, now seen corresponding path program 12 times [2024-06-21 20:06:26,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:26,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697907492] [2024-06-21 20:06:26,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:26,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:26,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:26,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697907492] [2024-06-21 20:06:26,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697907492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:26,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:26,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:26,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499467984] [2024-06-21 20:06:26,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:26,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:26,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:26,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:26,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:26,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:26,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 529 transitions, 6875 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:26,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:26,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:26,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:27,712 INFO L124 PetriNetUnfolderBase]: 3171/5333 cut-off events. [2024-06-21 20:06:27,712 INFO L125 PetriNetUnfolderBase]: For 469058/469058 co-relation queries the response was YES. [2024-06-21 20:06:27,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37038 conditions, 5333 events. 3171/5333 cut-off events. For 469058/469058 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 35605 event pairs, 643 based on Foata normal form. 2/5324 useless extension candidates. Maximal degree in co-relation 36856. Up to 4690 conditions per place. [2024-06-21 20:06:27,782 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 441 selfloop transitions, 102 changer transitions 0/550 dead transitions. [2024-06-21 20:06:27,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 550 transitions, 8013 flow [2024-06-21 20:06:27,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:27,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:27,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 20:06:27,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-21 20:06:27,783 INFO L175 Difference]: Start difference. First operand has 414 places, 529 transitions, 6875 flow. Second operand 7 states and 167 transitions. [2024-06-21 20:06:27,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 550 transitions, 8013 flow [2024-06-21 20:06:29,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 550 transitions, 7639 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 20:06:29,390 INFO L231 Difference]: Finished difference. Result has 412 places, 529 transitions, 6713 flow [2024-06-21 20:06:29,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6501, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6713, PETRI_PLACES=412, PETRI_TRANSITIONS=529} [2024-06-21 20:06:29,391 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 371 predicate places. [2024-06-21 20:06:29,391 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 529 transitions, 6713 flow [2024-06-21 20:06:29,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:29,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:29,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:29,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 20:06:29,391 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:29,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:29,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1230286263, now seen corresponding path program 13 times [2024-06-21 20:06:29,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:29,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808595120] [2024-06-21 20:06:29,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:29,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:29,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:29,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808595120] [2024-06-21 20:06:29,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808595120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:29,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:29,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:29,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089338545] [2024-06-21 20:06:29,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:29,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:29,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:29,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:29,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:29,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:29,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 529 transitions, 6713 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:29,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:29,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:29,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:30,421 INFO L124 PetriNetUnfolderBase]: 3179/5348 cut-off events. [2024-06-21 20:06:30,421 INFO L125 PetriNetUnfolderBase]: For 465872/465875 co-relation queries the response was YES. [2024-06-21 20:06:30,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36622 conditions, 5348 events. 3179/5348 cut-off events. For 465872/465875 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 35752 event pairs, 631 based on Foata normal form. 4/5345 useless extension candidates. Maximal degree in co-relation 36441. Up to 4807 conditions per place. [2024-06-21 20:06:30,497 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 484 selfloop transitions, 58 changer transitions 0/549 dead transitions. [2024-06-21 20:06:30,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 549 transitions, 7894 flow [2024-06-21 20:06:30,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:30,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:30,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 20:06:30,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:06:30,498 INFO L175 Difference]: Start difference. First operand has 412 places, 529 transitions, 6713 flow. Second operand 7 states and 161 transitions. [2024-06-21 20:06:30,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 549 transitions, 7894 flow [2024-06-21 20:06:32,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 549 transitions, 7638 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 20:06:32,081 INFO L231 Difference]: Finished difference. Result has 411 places, 531 transitions, 6641 flow [2024-06-21 20:06:32,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6457, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6641, PETRI_PLACES=411, PETRI_TRANSITIONS=531} [2024-06-21 20:06:32,081 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 370 predicate places. [2024-06-21 20:06:32,081 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 531 transitions, 6641 flow [2024-06-21 20:06:32,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:32,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:32,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:32,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 20:06:32,082 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:32,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:32,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1482292959, now seen corresponding path program 14 times [2024-06-21 20:06:32,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:32,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112852506] [2024-06-21 20:06:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:32,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:32,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:32,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112852506] [2024-06-21 20:06:32,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112852506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:32,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:32,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:32,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848540328] [2024-06-21 20:06:32,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:32,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:32,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:32,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:32,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:32,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:32,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 531 transitions, 6641 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:32,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:32,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:32,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:33,207 INFO L124 PetriNetUnfolderBase]: 3156/5318 cut-off events. [2024-06-21 20:06:33,207 INFO L125 PetriNetUnfolderBase]: For 456989/457004 co-relation queries the response was YES. [2024-06-21 20:06:33,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35248 conditions, 5318 events. 3156/5318 cut-off events. For 456989/457004 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 35604 event pairs, 642 based on Foata normal form. 22/5334 useless extension candidates. Maximal degree in co-relation 35067. Up to 4655 conditions per place. [2024-06-21 20:06:33,278 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 477 selfloop transitions, 70 changer transitions 0/554 dead transitions. [2024-06-21 20:06:33,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 554 transitions, 7813 flow [2024-06-21 20:06:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:06:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:06:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 20:06:33,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-21 20:06:33,278 INFO L175 Difference]: Start difference. First operand has 411 places, 531 transitions, 6641 flow. Second operand 6 states and 151 transitions. [2024-06-21 20:06:33,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 554 transitions, 7813 flow [2024-06-21 20:06:34,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 554 transitions, 7650 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 20:06:34,883 INFO L231 Difference]: Finished difference. Result has 412 places, 531 transitions, 6627 flow [2024-06-21 20:06:34,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6478, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6627, PETRI_PLACES=412, PETRI_TRANSITIONS=531} [2024-06-21 20:06:34,883 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 371 predicate places. [2024-06-21 20:06:34,884 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 531 transitions, 6627 flow [2024-06-21 20:06:34,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:34,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:34,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:34,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 20:06:34,884 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:34,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:34,884 INFO L85 PathProgramCache]: Analyzing trace with hash -225735639, now seen corresponding path program 15 times [2024-06-21 20:06:34,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:34,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331465894] [2024-06-21 20:06:34,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:34,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:34,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:34,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331465894] [2024-06-21 20:06:34,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331465894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:34,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:34,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:34,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665993882] [2024-06-21 20:06:34,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:34,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:34,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:34,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:34,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:35,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:35,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 531 transitions, 6627 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:35,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:35,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:35,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:35,943 INFO L124 PetriNetUnfolderBase]: 3110/5239 cut-off events. [2024-06-21 20:06:35,943 INFO L125 PetriNetUnfolderBase]: For 412988/412991 co-relation queries the response was YES. [2024-06-21 20:06:36,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32713 conditions, 5239 events. 3110/5239 cut-off events. For 412988/412991 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 35040 event pairs, 590 based on Foata normal form. 22/5254 useless extension candidates. Maximal degree in co-relation 32531. Up to 4515 conditions per place. [2024-06-21 20:06:36,017 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 460 selfloop transitions, 98 changer transitions 0/565 dead transitions. [2024-06-21 20:06:36,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 565 transitions, 7849 flow [2024-06-21 20:06:36,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:36,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:36,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 20:06:36,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-21 20:06:36,018 INFO L175 Difference]: Start difference. First operand has 412 places, 531 transitions, 6627 flow. Second operand 8 states and 201 transitions. [2024-06-21 20:06:36,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 565 transitions, 7849 flow [2024-06-21 20:06:37,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 565 transitions, 7662 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 20:06:37,593 INFO L231 Difference]: Finished difference. Result has 415 places, 531 transitions, 6661 flow [2024-06-21 20:06:37,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6440, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6661, PETRI_PLACES=415, PETRI_TRANSITIONS=531} [2024-06-21 20:06:37,593 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 374 predicate places. [2024-06-21 20:06:37,593 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 531 transitions, 6661 flow [2024-06-21 20:06:37,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:37,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:37,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:37,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 20:06:37,594 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:37,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:37,594 INFO L85 PathProgramCache]: Analyzing trace with hash 11925683, now seen corresponding path program 16 times [2024-06-21 20:06:37,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:37,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664037574] [2024-06-21 20:06:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:37,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:37,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:37,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664037574] [2024-06-21 20:06:37,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664037574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:37,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:37,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:37,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800021483] [2024-06-21 20:06:37,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:37,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:37,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:37,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:37,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:37,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:37,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 531 transitions, 6661 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:37,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:37,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:37,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:38,717 INFO L124 PetriNetUnfolderBase]: 3080/5209 cut-off events. [2024-06-21 20:06:38,717 INFO L125 PetriNetUnfolderBase]: For 318792/318807 co-relation queries the response was YES. [2024-06-21 20:06:38,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31419 conditions, 5209 events. 3080/5209 cut-off events. For 318792/318807 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 35006 event pairs, 506 based on Foata normal form. 22/5225 useless extension candidates. Maximal degree in co-relation 31236. Up to 4086 conditions per place. [2024-06-21 20:06:38,782 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 465 selfloop transitions, 86 changer transitions 0/558 dead transitions. [2024-06-21 20:06:38,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 558 transitions, 7871 flow [2024-06-21 20:06:38,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:06:38,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:06:38,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 20:06:38,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-21 20:06:38,783 INFO L175 Difference]: Start difference. First operand has 415 places, 531 transitions, 6661 flow. Second operand 6 states and 154 transitions. [2024-06-21 20:06:38,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 558 transitions, 7871 flow [2024-06-21 20:06:40,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 558 transitions, 7633 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 20:06:40,152 INFO L231 Difference]: Finished difference. Result has 413 places, 531 transitions, 6606 flow [2024-06-21 20:06:40,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6423, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6606, PETRI_PLACES=413, PETRI_TRANSITIONS=531} [2024-06-21 20:06:40,153 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 372 predicate places. [2024-06-21 20:06:40,153 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 531 transitions, 6606 flow [2024-06-21 20:06:40,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:40,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:40,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:40,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 20:06:40,153 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:40,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:40,154 INFO L85 PathProgramCache]: Analyzing trace with hash -961830675, now seen corresponding path program 1 times [2024-06-21 20:06:40,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:40,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834887976] [2024-06-21 20:06:40,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:40,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:40,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:40,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834887976] [2024-06-21 20:06:40,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834887976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:40,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:40,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:06:40,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646878733] [2024-06-21 20:06:40,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:40,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:06:40,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:40,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:06:40,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:06:40,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:40,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 531 transitions, 6606 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:40,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:40,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:40,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:41,393 INFO L124 PetriNetUnfolderBase]: 3407/5722 cut-off events. [2024-06-21 20:06:41,393 INFO L125 PetriNetUnfolderBase]: For 579544/579544 co-relation queries the response was YES. [2024-06-21 20:06:41,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39603 conditions, 5722 events. 3407/5722 cut-off events. For 579544/579544 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 38218 event pairs, 634 based on Foata normal form. 6/5696 useless extension candidates. Maximal degree in co-relation 39420. Up to 2633 conditions per place. [2024-06-21 20:06:41,484 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 255 selfloop transitions, 327 changer transitions 0/589 dead transitions. [2024-06-21 20:06:41,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 589 transitions, 8454 flow [2024-06-21 20:06:41,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:06:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:06:41,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-21 20:06:41,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-21 20:06:41,485 INFO L175 Difference]: Start difference. First operand has 413 places, 531 transitions, 6606 flow. Second operand 9 states and 237 transitions. [2024-06-21 20:06:41,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 589 transitions, 8454 flow [2024-06-21 20:06:43,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 589 transitions, 8219 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 20:06:43,803 INFO L231 Difference]: Finished difference. Result has 415 places, 534 transitions, 7113 flow [2024-06-21 20:06:43,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6375, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7113, PETRI_PLACES=415, PETRI_TRANSITIONS=534} [2024-06-21 20:06:43,803 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 374 predicate places. [2024-06-21 20:06:43,803 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 534 transitions, 7113 flow [2024-06-21 20:06:43,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:43,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:43,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:43,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 20:06:43,804 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:43,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:43,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1207427609, now seen corresponding path program 1 times [2024-06-21 20:06:43,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:43,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929583830] [2024-06-21 20:06:43,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:43,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:43,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:43,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929583830] [2024-06-21 20:06:43,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929583830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:43,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:43,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:43,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202655533] [2024-06-21 20:06:43,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:43,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:43,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:43,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:43,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:43,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:43,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 534 transitions, 7113 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:43,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:43,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:43,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:45,045 INFO L124 PetriNetUnfolderBase]: 3514/5919 cut-off events. [2024-06-21 20:06:45,045 INFO L125 PetriNetUnfolderBase]: For 648096/648111 co-relation queries the response was YES. [2024-06-21 20:06:45,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42227 conditions, 5919 events. 3514/5919 cut-off events. For 648096/648111 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 39982 event pairs, 670 based on Foata normal form. 18/5931 useless extension candidates. Maximal degree in co-relation 42044. Up to 4442 conditions per place. [2024-06-21 20:06:45,128 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 449 selfloop transitions, 121 changer transitions 0/577 dead transitions. [2024-06-21 20:06:45,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 577 transitions, 8845 flow [2024-06-21 20:06:45,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 20:06:45,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:06:45,129 INFO L175 Difference]: Start difference. First operand has 415 places, 534 transitions, 7113 flow. Second operand 8 states and 196 transitions. [2024-06-21 20:06:45,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 577 transitions, 8845 flow [2024-06-21 20:06:47,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 577 transitions, 8395 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 20:06:47,645 INFO L231 Difference]: Finished difference. Result has 420 places, 539 transitions, 6986 flow [2024-06-21 20:06:47,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6665, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6986, PETRI_PLACES=420, PETRI_TRANSITIONS=539} [2024-06-21 20:06:47,645 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 379 predicate places. [2024-06-21 20:06:47,645 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 539 transitions, 6986 flow [2024-06-21 20:06:47,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:47,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:47,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:47,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 20:06:47,645 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:47,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:47,646 INFO L85 PathProgramCache]: Analyzing trace with hash -961710705, now seen corresponding path program 2 times [2024-06-21 20:06:47,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:47,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897606334] [2024-06-21 20:06:47,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:47,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:47,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:47,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897606334] [2024-06-21 20:06:47,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897606334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:47,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:47,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:06:47,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532434730] [2024-06-21 20:06:47,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:47,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:06:47,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:47,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:06:47,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:06:47,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:47,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 539 transitions, 6986 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:47,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:47,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:47,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:48,965 INFO L124 PetriNetUnfolderBase]: 3534/5944 cut-off events. [2024-06-21 20:06:48,966 INFO L125 PetriNetUnfolderBase]: For 660124/660127 co-relation queries the response was YES. [2024-06-21 20:06:49,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42577 conditions, 5944 events. 3534/5944 cut-off events. For 660124/660127 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 40120 event pairs, 644 based on Foata normal form. 8/5940 useless extension candidates. Maximal degree in co-relation 42391. Up to 4870 conditions per place. [2024-06-21 20:06:49,057 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 431 selfloop transitions, 145 changer transitions 0/583 dead transitions. [2024-06-21 20:06:49,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 583 transitions, 8306 flow [2024-06-21 20:06:49,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:06:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:06:49,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-21 20:06:49,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-21 20:06:49,061 INFO L175 Difference]: Start difference. First operand has 420 places, 539 transitions, 6986 flow. Second operand 9 states and 222 transitions. [2024-06-21 20:06:49,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 583 transitions, 8306 flow [2024-06-21 20:06:52,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 583 transitions, 8179 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 20:06:52,113 INFO L231 Difference]: Finished difference. Result has 427 places, 540 transitions, 7173 flow [2024-06-21 20:06:52,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6859, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7173, PETRI_PLACES=427, PETRI_TRANSITIONS=540} [2024-06-21 20:06:52,114 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-21 20:06:52,114 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 540 transitions, 7173 flow [2024-06-21 20:06:52,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:52,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:52,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:52,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 20:06:52,114 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:52,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:52,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1464447499, now seen corresponding path program 2 times [2024-06-21 20:06:52,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:52,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096120797] [2024-06-21 20:06:52,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:52,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:52,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:52,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096120797] [2024-06-21 20:06:52,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096120797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:52,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:52,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:52,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140661128] [2024-06-21 20:06:52,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:52,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:52,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:52,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:52,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:52,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:52,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 540 transitions, 7173 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:52,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:52,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:52,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:53,398 INFO L124 PetriNetUnfolderBase]: 3652/6145 cut-off events. [2024-06-21 20:06:53,398 INFO L125 PetriNetUnfolderBase]: For 735043/735058 co-relation queries the response was YES. [2024-06-21 20:06:53,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45406 conditions, 6145 events. 3652/6145 cut-off events. For 735043/735058 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 41804 event pairs, 707 based on Foata normal form. 18/6157 useless extension candidates. Maximal degree in co-relation 45218. Up to 4538 conditions per place. [2024-06-21 20:06:53,496 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 457 selfloop transitions, 124 changer transitions 0/588 dead transitions. [2024-06-21 20:06:53,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 588 transitions, 9231 flow [2024-06-21 20:06:53,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:53,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:53,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 20:06:53,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-21 20:06:53,500 INFO L175 Difference]: Start difference. First operand has 427 places, 540 transitions, 7173 flow. Second operand 8 states and 195 transitions. [2024-06-21 20:06:53,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 588 transitions, 9231 flow [2024-06-21 20:06:56,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 588 transitions, 8909 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 20:06:56,555 INFO L231 Difference]: Finished difference. Result has 428 places, 548 transitions, 7247 flow [2024-06-21 20:06:56,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6869, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7247, PETRI_PLACES=428, PETRI_TRANSITIONS=548} [2024-06-21 20:06:56,556 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-21 20:06:56,556 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 548 transitions, 7247 flow [2024-06-21 20:06:56,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:56,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:56,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:56,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 20:06:56,557 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:06:56,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:56,557 INFO L85 PathProgramCache]: Analyzing trace with hash -784341849, now seen corresponding path program 3 times [2024-06-21 20:06:56,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:56,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968417544] [2024-06-21 20:06:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:56,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:56,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:56,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968417544] [2024-06-21 20:06:56,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968417544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:56,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:56,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:56,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772766825] [2024-06-21 20:06:56,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:56,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:56,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:56,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:56,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:56,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:56,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 548 transitions, 7247 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:56,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:56,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:56,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:57,855 INFO L124 PetriNetUnfolderBase]: 3639/6122 cut-off events. [2024-06-21 20:06:57,855 INFO L125 PetriNetUnfolderBase]: For 719014/719029 co-relation queries the response was YES. [2024-06-21 20:06:57,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44788 conditions, 6122 events. 3639/6122 cut-off events. For 719014/719029 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 41547 event pairs, 705 based on Foata normal form. 18/6134 useless extension candidates. Maximal degree in co-relation 44599. Up to 4532 conditions per place. [2024-06-21 20:06:57,938 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 450 selfloop transitions, 128 changer transitions 0/585 dead transitions. [2024-06-21 20:06:57,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 585 transitions, 8952 flow [2024-06-21 20:06:57,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:57,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 20:06:57,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:06:57,939 INFO L175 Difference]: Start difference. First operand has 428 places, 548 transitions, 7247 flow. Second operand 8 states and 192 transitions. [2024-06-21 20:06:57,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 585 transitions, 8952 flow [2024-06-21 20:07:00,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 585 transitions, 8753 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 20:07:00,963 INFO L231 Difference]: Finished difference. Result has 434 places, 551 transitions, 7363 flow [2024-06-21 20:07:00,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7048, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7363, PETRI_PLACES=434, PETRI_TRANSITIONS=551} [2024-06-21 20:07:00,965 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-21 20:07:00,965 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 551 transitions, 7363 flow [2024-06-21 20:07:00,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:00,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:00,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:00,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 20:07:00,965 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:00,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:00,965 INFO L85 PathProgramCache]: Analyzing trace with hash -784579185, now seen corresponding path program 3 times [2024-06-21 20:07:00,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:00,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882473891] [2024-06-21 20:07:00,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:00,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:01,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:01,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882473891] [2024-06-21 20:07:01,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882473891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:01,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:01,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:07:01,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855361797] [2024-06-21 20:07:01,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:01,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:07:01,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:01,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:07:01,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:07:01,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:01,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 551 transitions, 7363 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:01,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:01,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:01,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:02,333 INFO L124 PetriNetUnfolderBase]: 3692/6200 cut-off events. [2024-06-21 20:07:02,333 INFO L125 PetriNetUnfolderBase]: For 763773/763776 co-relation queries the response was YES. [2024-06-21 20:07:02,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46120 conditions, 6200 events. 3692/6200 cut-off events. For 763773/763776 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 42055 event pairs, 689 based on Foata normal form. 8/6196 useless extension candidates. Maximal degree in co-relation 45929. Up to 5031 conditions per place. [2024-06-21 20:07:02,427 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 432 selfloop transitions, 156 changer transitions 0/595 dead transitions. [2024-06-21 20:07:02,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 595 transitions, 8921 flow [2024-06-21 20:07:02,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:07:02,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:07:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-21 20:07:02,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-21 20:07:02,428 INFO L175 Difference]: Start difference. First operand has 434 places, 551 transitions, 7363 flow. Second operand 10 states and 236 transitions. [2024-06-21 20:07:02,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 595 transitions, 8921 flow [2024-06-21 20:07:06,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 595 transitions, 8665 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 20:07:06,123 INFO L231 Difference]: Finished difference. Result has 441 places, 553 transitions, 7473 flow [2024-06-21 20:07:06,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7107, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7473, PETRI_PLACES=441, PETRI_TRANSITIONS=553} [2024-06-21 20:07:06,124 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 400 predicate places. [2024-06-21 20:07:06,124 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 553 transitions, 7473 flow [2024-06-21 20:07:06,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:06,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:06,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:06,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 20:07:06,124 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:06,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:06,125 INFO L85 PathProgramCache]: Analyzing trace with hash 641648333, now seen corresponding path program 4 times [2024-06-21 20:07:06,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:06,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675627571] [2024-06-21 20:07:06,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:06,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:06,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:06,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675627571] [2024-06-21 20:07:06,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675627571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:06,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:06,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:07:06,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649377955] [2024-06-21 20:07:06,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:06,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:07:06,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:06,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:07:06,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:07:06,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:06,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 553 transitions, 7473 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:06,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:06,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:06,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:07,580 INFO L124 PetriNetUnfolderBase]: 3893/6516 cut-off events. [2024-06-21 20:07:07,580 INFO L125 PetriNetUnfolderBase]: For 968076/968076 co-relation queries the response was YES. [2024-06-21 20:07:07,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51298 conditions, 6516 events. 3893/6516 cut-off events. For 968076/968076 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 44565 event pairs, 1037 based on Foata normal form. 8/6496 useless extension candidates. Maximal degree in co-relation 51105. Up to 5041 conditions per place. [2024-06-21 20:07:07,686 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 271 selfloop transitions, 322 changer transitions 0/600 dead transitions. [2024-06-21 20:07:07,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 600 transitions, 9065 flow [2024-06-21 20:07:07,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:07:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:07:07,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-21 20:07:07,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-21 20:07:07,687 INFO L175 Difference]: Start difference. First operand has 441 places, 553 transitions, 7473 flow. Second operand 9 states and 230 transitions. [2024-06-21 20:07:07,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 600 transitions, 9065 flow [2024-06-21 20:07:11,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 600 transitions, 8733 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-21 20:07:11,513 INFO L231 Difference]: Finished difference. Result has 441 places, 555 transitions, 7835 flow [2024-06-21 20:07:11,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7141, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7835, PETRI_PLACES=441, PETRI_TRANSITIONS=555} [2024-06-21 20:07:11,513 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 400 predicate places. [2024-06-21 20:07:11,514 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 555 transitions, 7835 flow [2024-06-21 20:07:11,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:11,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:11,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:11,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 20:07:11,514 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:11,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:11,514 INFO L85 PathProgramCache]: Analyzing trace with hash 499545263, now seen corresponding path program 5 times [2024-06-21 20:07:11,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:11,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961760538] [2024-06-21 20:07:11,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:11,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:11,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:11,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:11,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961760538] [2024-06-21 20:07:11,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961760538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:11,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:11,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:07:11,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105048340] [2024-06-21 20:07:11,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:11,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:07:11,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:11,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:07:11,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:07:11,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:11,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 555 transitions, 7835 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:11,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:11,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:11,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:12,995 INFO L124 PetriNetUnfolderBase]: 4093/6856 cut-off events. [2024-06-21 20:07:12,995 INFO L125 PetriNetUnfolderBase]: For 1169173/1169173 co-relation queries the response was YES. [2024-06-21 20:07:13,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56885 conditions, 6856 events. 4093/6856 cut-off events. For 1169173/1169173 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 47245 event pairs, 1058 based on Foata normal form. 6/6830 useless extension candidates. Maximal degree in co-relation 56694. Up to 4914 conditions per place. [2024-06-21 20:07:13,106 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 277 selfloop transitions, 325 changer transitions 0/609 dead transitions. [2024-06-21 20:07:13,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 609 transitions, 9709 flow [2024-06-21 20:07:13,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:07:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:07:13,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-21 20:07:13,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-06-21 20:07:13,107 INFO L175 Difference]: Start difference. First operand has 441 places, 555 transitions, 7835 flow. Second operand 9 states and 235 transitions. [2024-06-21 20:07:13,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 609 transitions, 9709 flow [2024-06-21 20:07:16,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 609 transitions, 9260 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 20:07:16,674 INFO L231 Difference]: Finished difference. Result has 446 places, 558 transitions, 8124 flow [2024-06-21 20:07:16,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7394, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8124, PETRI_PLACES=446, PETRI_TRANSITIONS=558} [2024-06-21 20:07:16,674 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 405 predicate places. [2024-06-21 20:07:16,674 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 558 transitions, 8124 flow [2024-06-21 20:07:16,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:16,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:16,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:16,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 20:07:16,675 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:16,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:16,675 INFO L85 PathProgramCache]: Analyzing trace with hash 499665233, now seen corresponding path program 6 times [2024-06-21 20:07:16,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:16,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534954147] [2024-06-21 20:07:16,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:16,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:16,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:16,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534954147] [2024-06-21 20:07:16,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534954147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:16,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:16,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:07:16,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397824808] [2024-06-21 20:07:16,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:16,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:07:16,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:16,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:07:16,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:07:16,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:16,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 558 transitions, 8124 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:16,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:16,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:16,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:18,318 INFO L124 PetriNetUnfolderBase]: 4080/6831 cut-off events. [2024-06-21 20:07:18,318 INFO L125 PetriNetUnfolderBase]: For 1119212/1119215 co-relation queries the response was YES. [2024-06-21 20:07:18,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56594 conditions, 6831 events. 4080/6831 cut-off events. For 1119212/1119215 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 47124 event pairs, 1111 based on Foata normal form. 8/6816 useless extension candidates. Maximal degree in co-relation 56400. Up to 6037 conditions per place. [2024-06-21 20:07:18,413 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 457 selfloop transitions, 133 changer transitions 0/597 dead transitions. [2024-06-21 20:07:18,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 597 transitions, 9428 flow [2024-06-21 20:07:18,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:07:18,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:07:18,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-21 20:07:18,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-21 20:07:18,414 INFO L175 Difference]: Start difference. First operand has 446 places, 558 transitions, 8124 flow. Second operand 9 states and 219 transitions. [2024-06-21 20:07:18,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 597 transitions, 9428 flow [2024-06-21 20:07:21,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 597 transitions, 8753 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 20:07:21,876 INFO L231 Difference]: Finished difference. Result has 447 places, 558 transitions, 7719 flow [2024-06-21 20:07:21,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7449, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7719, PETRI_PLACES=447, PETRI_TRANSITIONS=558} [2024-06-21 20:07:21,877 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 406 predicate places. [2024-06-21 20:07:21,877 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 558 transitions, 7719 flow [2024-06-21 20:07:21,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:21,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:21,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:21,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 20:07:21,877 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:21,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:21,877 INFO L85 PathProgramCache]: Analyzing trace with hash 650219213, now seen corresponding path program 7 times [2024-06-21 20:07:21,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:21,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389599760] [2024-06-21 20:07:21,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:21,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:21,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:21,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389599760] [2024-06-21 20:07:21,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389599760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:21,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:21,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:07:21,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158071255] [2024-06-21 20:07:21,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:21,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:07:21,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:21,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:07:21,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:07:22,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:22,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 558 transitions, 7719 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:22,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:22,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:22,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:23,338 INFO L124 PetriNetUnfolderBase]: 4108/6887 cut-off events. [2024-06-21 20:07:23,338 INFO L125 PetriNetUnfolderBase]: For 1147202/1147202 co-relation queries the response was YES. [2024-06-21 20:07:23,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56408 conditions, 6887 events. 4108/6887 cut-off events. For 1147202/1147202 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 47619 event pairs, 1180 based on Foata normal form. 8/6869 useless extension candidates. Maximal degree in co-relation 56215. Up to 5767 conditions per place. [2024-06-21 20:07:23,446 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 266 selfloop transitions, 321 changer transitions 0/594 dead transitions. [2024-06-21 20:07:23,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 594 transitions, 9019 flow [2024-06-21 20:07:23,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:07:23,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:07:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-21 20:07:23,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138888888888889 [2024-06-21 20:07:23,447 INFO L175 Difference]: Start difference. First operand has 447 places, 558 transitions, 7719 flow. Second operand 9 states and 221 transitions. [2024-06-21 20:07:23,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 594 transitions, 9019 flow [2024-06-21 20:07:27,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 594 transitions, 8749 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:07:27,360 INFO L231 Difference]: Finished difference. Result has 450 places, 559 transitions, 8118 flow [2024-06-21 20:07:27,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7449, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8118, PETRI_PLACES=450, PETRI_TRANSITIONS=559} [2024-06-21 20:07:27,360 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 409 predicate places. [2024-06-21 20:07:27,360 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 559 transitions, 8118 flow [2024-06-21 20:07:27,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:27,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:27,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:27,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 20:07:27,361 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:27,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:27,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1206785367, now seen corresponding path program 4 times [2024-06-21 20:07:27,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:27,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064001944] [2024-06-21 20:07:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:27,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:27,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:27,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064001944] [2024-06-21 20:07:27,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064001944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:27,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:27,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:27,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502250220] [2024-06-21 20:07:27,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:27,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:27,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:27,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:27,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:27,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:27,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 559 transitions, 8118 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:27,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:27,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:27,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:28,812 INFO L124 PetriNetUnfolderBase]: 4174/6998 cut-off events. [2024-06-21 20:07:28,813 INFO L125 PetriNetUnfolderBase]: For 1206368/1206383 co-relation queries the response was YES. [2024-06-21 20:07:28,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58441 conditions, 6998 events. 4174/6998 cut-off events. For 1206368/1206383 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 48519 event pairs, 1148 based on Foata normal form. 18/6999 useless extension candidates. Maximal degree in co-relation 58247. Up to 6109 conditions per place. [2024-06-21 20:07:28,927 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 476 selfloop transitions, 111 changer transitions 0/594 dead transitions. [2024-06-21 20:07:28,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 594 transitions, 9643 flow [2024-06-21 20:07:28,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:28,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:28,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 20:07:28,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:07:28,928 INFO L175 Difference]: Start difference. First operand has 450 places, 559 transitions, 8118 flow. Second operand 8 states and 192 transitions. [2024-06-21 20:07:28,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 594 transitions, 9643 flow [2024-06-21 20:07:32,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 594 transitions, 8996 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 20:07:32,256 INFO L231 Difference]: Finished difference. Result has 452 places, 561 transitions, 7760 flow [2024-06-21 20:07:32,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7471, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7760, PETRI_PLACES=452, PETRI_TRANSITIONS=561} [2024-06-21 20:07:32,257 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-21 20:07:32,257 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 561 transitions, 7760 flow [2024-06-21 20:07:32,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:32,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:32,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:32,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 20:07:32,257 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:32,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:32,257 INFO L85 PathProgramCache]: Analyzing trace with hash -580329819, now seen corresponding path program 8 times [2024-06-21 20:07:32,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:32,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915012888] [2024-06-21 20:07:32,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:32,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:32,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:32,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915012888] [2024-06-21 20:07:32,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915012888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:32,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:32,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:07:32,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628221591] [2024-06-21 20:07:32,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:32,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:07:32,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:32,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:07:32,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:07:32,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:32,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 561 transitions, 7760 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:32,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:32,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:32,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:33,877 INFO L124 PetriNetUnfolderBase]: 4248/7124 cut-off events. [2024-06-21 20:07:33,877 INFO L125 PetriNetUnfolderBase]: For 1270635/1270638 co-relation queries the response was YES. [2024-06-21 20:07:33,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59825 conditions, 7124 events. 4248/7124 cut-off events. For 1270635/1270638 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 49487 event pairs, 1176 based on Foata normal form. 8/7120 useless extension candidates. Maximal degree in co-relation 59629. Up to 6308 conditions per place. [2024-06-21 20:07:33,999 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 461 selfloop transitions, 134 changer transitions 0/602 dead transitions. [2024-06-21 20:07:34,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 602 transitions, 9356 flow [2024-06-21 20:07:34,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:07:34,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:07:34,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-21 20:07:34,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-06-21 20:07:34,000 INFO L175 Difference]: Start difference. First operand has 452 places, 561 transitions, 7760 flow. Second operand 10 states and 234 transitions. [2024-06-21 20:07:34,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 602 transitions, 9356 flow [2024-06-21 20:07:38,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 602 transitions, 9149 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:07:38,081 INFO L231 Difference]: Finished difference. Result has 458 places, 565 transitions, 7915 flow [2024-06-21 20:07:38,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7554, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7915, PETRI_PLACES=458, PETRI_TRANSITIONS=565} [2024-06-21 20:07:38,082 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 417 predicate places. [2024-06-21 20:07:38,082 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 565 transitions, 7915 flow [2024-06-21 20:07:38,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:38,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:38,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:38,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 20:07:38,083 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:38,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:38,083 INFO L85 PathProgramCache]: Analyzing trace with hash 470080199, now seen corresponding path program 5 times [2024-06-21 20:07:38,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:38,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806582312] [2024-06-21 20:07:38,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:38,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:38,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:38,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806582312] [2024-06-21 20:07:38,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806582312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:38,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:38,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:38,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947812051] [2024-06-21 20:07:38,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:38,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:38,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:38,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:38,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:38,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:38,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 565 transitions, 7915 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:38,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:38,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:38,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:40,260 INFO L124 PetriNetUnfolderBase]: 4276/7185 cut-off events. [2024-06-21 20:07:40,260 INFO L125 PetriNetUnfolderBase]: For 1307929/1307944 co-relation queries the response was YES. [2024-06-21 20:07:40,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60458 conditions, 7185 events. 4276/7185 cut-off events. For 1307929/1307944 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 50150 event pairs, 1201 based on Foata normal form. 20/7199 useless extension candidates. Maximal degree in co-relation 60260. Up to 6403 conditions per place. [2024-06-21 20:07:40,428 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 477 selfloop transitions, 107 changer transitions 0/591 dead transitions. [2024-06-21 20:07:40,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 591 transitions, 9182 flow [2024-06-21 20:07:40,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:40,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 20:07:40,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-21 20:07:40,429 INFO L175 Difference]: Start difference. First operand has 458 places, 565 transitions, 7915 flow. Second operand 8 states and 185 transitions. [2024-06-21 20:07:40,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 591 transitions, 9182 flow [2024-06-21 20:07:46,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 591 transitions, 8906 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 20:07:46,552 INFO L231 Difference]: Finished difference. Result has 459 places, 566 transitions, 7881 flow [2024-06-21 20:07:46,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7639, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7881, PETRI_PLACES=459, PETRI_TRANSITIONS=566} [2024-06-21 20:07:46,552 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 418 predicate places. [2024-06-21 20:07:46,553 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 566 transitions, 7881 flow [2024-06-21 20:07:46,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:46,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:46,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:46,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 20:07:46,553 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:46,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:46,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1483516115, now seen corresponding path program 9 times [2024-06-21 20:07:46,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:46,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303065105] [2024-06-21 20:07:46,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:46,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:46,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:46,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303065105] [2024-06-21 20:07:46,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303065105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:46,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:46,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:07:46,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447851935] [2024-06-21 20:07:46,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:46,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:07:46,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:46,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:07:46,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:07:46,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:46,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 566 transitions, 7881 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:46,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:46,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:46,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:48,606 INFO L124 PetriNetUnfolderBase]: 4258/7142 cut-off events. [2024-06-21 20:07:48,606 INFO L125 PetriNetUnfolderBase]: For 1284173/1284176 co-relation queries the response was YES. [2024-06-21 20:07:48,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59527 conditions, 7142 events. 4258/7142 cut-off events. For 1284173/1284176 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 49715 event pairs, 1178 based on Foata normal form. 10/7140 useless extension candidates. Maximal degree in co-relation 59328. Up to 6374 conditions per place. [2024-06-21 20:07:48,746 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 460 selfloop transitions, 131 changer transitions 0/598 dead transitions. [2024-06-21 20:07:48,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 598 transitions, 9161 flow [2024-06-21 20:07:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:07:48,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:07:48,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-21 20:07:48,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-21 20:07:48,747 INFO L175 Difference]: Start difference. First operand has 459 places, 566 transitions, 7881 flow. Second operand 9 states and 213 transitions. [2024-06-21 20:07:48,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 598 transitions, 9161 flow [2024-06-21 20:07:52,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 598 transitions, 8930 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 20:07:52,691 INFO L231 Difference]: Finished difference. Result has 462 places, 566 transitions, 7917 flow [2024-06-21 20:07:52,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7650, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7917, PETRI_PLACES=462, PETRI_TRANSITIONS=566} [2024-06-21 20:07:52,692 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 421 predicate places. [2024-06-21 20:07:52,692 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 566 transitions, 7917 flow [2024-06-21 20:07:52,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:52,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:52,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:52,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 20:07:52,693 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:07:52,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:52,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1199376057, now seen corresponding path program 6 times [2024-06-21 20:07:52,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:52,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949149272] [2024-06-21 20:07:52,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:52,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:52,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:52,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949149272] [2024-06-21 20:07:52,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949149272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:52,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:52,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:52,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344430549] [2024-06-21 20:07:52,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:52,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:52,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:52,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:52,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:52,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:52,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 566 transitions, 7917 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:52,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:52,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:52,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:54,787 INFO L124 PetriNetUnfolderBase]: 4278/7185 cut-off events. [2024-06-21 20:07:54,787 INFO L125 PetriNetUnfolderBase]: For 1296873/1296888 co-relation queries the response was YES. [2024-06-21 20:07:54,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59868 conditions, 7185 events. 4278/7185 cut-off events. For 1296873/1296888 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 50183 event pairs, 1187 based on Foata normal form. 18/7195 useless extension candidates. Maximal degree in co-relation 59668. Up to 6379 conditions per place. [2024-06-21 20:07:54,952 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 479 selfloop transitions, 109 changer transitions 0/595 dead transitions. [2024-06-21 20:07:54,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 595 transitions, 9210 flow [2024-06-21 20:07:54,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:54,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 20:07:54,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 20:07:54,953 INFO L175 Difference]: Start difference. First operand has 462 places, 566 transitions, 7917 flow. Second operand 8 states and 188 transitions. [2024-06-21 20:07:54,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 595 transitions, 9210 flow [2024-06-21 20:08:01,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 595 transitions, 8951 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:08:01,702 INFO L231 Difference]: Finished difference. Result has 463 places, 567 transitions, 7905 flow [2024-06-21 20:08:01,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7658, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7905, PETRI_PLACES=463, PETRI_TRANSITIONS=567} [2024-06-21 20:08:01,703 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 422 predicate places. [2024-06-21 20:08:01,703 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 567 transitions, 7905 flow [2024-06-21 20:08:01,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:01,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:01,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:08:01,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 20:08:01,704 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:01,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:01,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2041037765, now seen corresponding path program 7 times [2024-06-21 20:08:01,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:01,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310107083] [2024-06-21 20:08:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:01,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:01,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:01,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310107083] [2024-06-21 20:08:01,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310107083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:01,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:01,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:01,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617353635] [2024-06-21 20:08:01,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:01,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:01,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:01,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:01,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:01,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:01,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 567 transitions, 7905 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:01,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:01,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:01,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:04,256 INFO L124 PetriNetUnfolderBase]: 4567/7636 cut-off events. [2024-06-21 20:08:04,257 INFO L125 PetriNetUnfolderBase]: For 1576870/1576885 co-relation queries the response was YES. [2024-06-21 20:08:04,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67298 conditions, 7636 events. 4567/7636 cut-off events. For 1576870/1576885 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 53570 event pairs, 1239 based on Foata normal form. 18/7642 useless extension candidates. Maximal degree in co-relation 67097. Up to 6421 conditions per place. [2024-06-21 20:08:04,436 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 483 selfloop transitions, 122 changer transitions 0/612 dead transitions. [2024-06-21 20:08:04,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 612 transitions, 9925 flow [2024-06-21 20:08:04,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:04,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:04,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 20:08:04,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-21 20:08:04,437 INFO L175 Difference]: Start difference. First operand has 463 places, 567 transitions, 7905 flow. Second operand 8 states and 189 transitions. [2024-06-21 20:08:04,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 612 transitions, 9925 flow [2024-06-21 20:08:10,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 612 transitions, 9703 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 20:08:10,826 INFO L231 Difference]: Finished difference. Result has 467 places, 582 transitions, 8251 flow [2024-06-21 20:08:10,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7683, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8251, PETRI_PLACES=467, PETRI_TRANSITIONS=582} [2024-06-21 20:08:10,826 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 426 predicate places. [2024-06-21 20:08:10,826 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 582 transitions, 8251 flow [2024-06-21 20:08:10,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:10,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:10,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:08:10,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 20:08:10,827 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:10,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:10,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1461372997, now seen corresponding path program 8 times [2024-06-21 20:08:10,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:10,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400937579] [2024-06-21 20:08:10,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:10,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:10,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:10,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400937579] [2024-06-21 20:08:10,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400937579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:10,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:10,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:10,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30418206] [2024-06-21 20:08:10,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:10,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:10,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:10,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:10,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:10,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:10,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 582 transitions, 8251 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:10,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:10,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:10,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:13,289 INFO L124 PetriNetUnfolderBase]: 4549/7616 cut-off events. [2024-06-21 20:08:13,289 INFO L125 PetriNetUnfolderBase]: For 1569883/1569898 co-relation queries the response was YES. [2024-06-21 20:08:13,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66949 conditions, 7616 events. 4549/7616 cut-off events. For 1569883/1569898 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 53454 event pairs, 1274 based on Foata normal form. 20/7630 useless extension candidates. Maximal degree in co-relation 66746. Up to 6646 conditions per place. [2024-06-21 20:08:13,472 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 491 selfloop transitions, 111 changer transitions 0/609 dead transitions. [2024-06-21 20:08:13,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 609 transitions, 9773 flow [2024-06-21 20:08:13,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 20:08:13,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-21 20:08:13,473 INFO L175 Difference]: Start difference. First operand has 467 places, 582 transitions, 8251 flow. Second operand 8 states and 186 transitions. [2024-06-21 20:08:13,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 609 transitions, 9773 flow [2024-06-21 20:08:19,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 609 transitions, 9632 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 20:08:19,809 INFO L231 Difference]: Finished difference. Result has 472 places, 582 transitions, 8336 flow [2024-06-21 20:08:19,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8110, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8336, PETRI_PLACES=472, PETRI_TRANSITIONS=582} [2024-06-21 20:08:19,810 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 431 predicate places. [2024-06-21 20:08:19,810 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 582 transitions, 8336 flow [2024-06-21 20:08:19,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:19,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:19,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:08:19,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 20:08:19,810 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:19,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:19,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1464229957, now seen corresponding path program 9 times [2024-06-21 20:08:19,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:19,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188869554] [2024-06-21 20:08:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:19,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:19,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:19,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188869554] [2024-06-21 20:08:19,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188869554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:19,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:19,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:19,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313729048] [2024-06-21 20:08:19,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:19,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:19,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:19,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:19,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:19,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:19,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 582 transitions, 8336 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:19,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:19,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:19,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:22,299 INFO L124 PetriNetUnfolderBase]: 4577/7660 cut-off events. [2024-06-21 20:08:22,300 INFO L125 PetriNetUnfolderBase]: For 1599696/1599711 co-relation queries the response was YES. [2024-06-21 20:08:22,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67758 conditions, 7660 events. 4577/7660 cut-off events. For 1599696/1599711 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 53864 event pairs, 1294 based on Foata normal form. 20/7674 useless extension candidates. Maximal degree in co-relation 67553. Up to 6870 conditions per place. [2024-06-21 20:08:22,725 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 490 selfloop transitions, 108 changer transitions 0/605 dead transitions. [2024-06-21 20:08:22,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 605 transitions, 9632 flow [2024-06-21 20:08:22,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:22,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:22,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 20:08:22,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-21 20:08:22,726 INFO L175 Difference]: Start difference. First operand has 472 places, 582 transitions, 8336 flow. Second operand 8 states and 182 transitions. [2024-06-21 20:08:22,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 605 transitions, 9632 flow [2024-06-21 20:08:27,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 605 transitions, 9409 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 20:08:27,758 INFO L231 Difference]: Finished difference. Result has 475 places, 583 transitions, 8366 flow [2024-06-21 20:08:27,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8116, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8366, PETRI_PLACES=475, PETRI_TRANSITIONS=583} [2024-06-21 20:08:27,759 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-21 20:08:27,759 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 583 transitions, 8366 flow [2024-06-21 20:08:27,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:27,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:27,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:08:27,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 20:08:27,759 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:27,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:27,759 INFO L85 PathProgramCache]: Analyzing trace with hash 2040800429, now seen corresponding path program 10 times [2024-06-21 20:08:27,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:27,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709301694] [2024-06-21 20:08:27,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:27,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:27,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:27,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709301694] [2024-06-21 20:08:27,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709301694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:27,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:27,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:08:27,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979324193] [2024-06-21 20:08:27,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:27,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:08:27,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:27,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:08:27,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:08:27,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:27,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 583 transitions, 8366 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:27,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:27,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:27,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:29,694 INFO L124 PetriNetUnfolderBase]: 4722/7872 cut-off events. [2024-06-21 20:08:29,694 INFO L125 PetriNetUnfolderBase]: For 1755081/1755084 co-relation queries the response was YES. [2024-06-21 20:08:29,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71782 conditions, 7872 events. 4722/7872 cut-off events. For 1755081/1755084 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 55301 event pairs, 1308 based on Foata normal form. 8/7858 useless extension candidates. Maximal degree in co-relation 71576. Up to 6846 conditions per place. [2024-06-21 20:08:29,826 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 463 selfloop transitions, 152 changer transitions 0/622 dead transitions. [2024-06-21 20:08:29,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 622 transitions, 10029 flow [2024-06-21 20:08:29,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:08:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:08:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-21 20:08:29,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775 [2024-06-21 20:08:29,826 INFO L175 Difference]: Start difference. First operand has 475 places, 583 transitions, 8366 flow. Second operand 10 states and 231 transitions. [2024-06-21 20:08:29,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 622 transitions, 10029 flow [2024-06-21 20:08:35,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 622 transitions, 9804 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:08:35,197 INFO L231 Difference]: Finished difference. Result has 480 places, 587 transitions, 8576 flow [2024-06-21 20:08:35,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8141, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8576, PETRI_PLACES=480, PETRI_TRANSITIONS=587} [2024-06-21 20:08:35,197 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-21 20:08:35,198 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 587 transitions, 8576 flow [2024-06-21 20:08:35,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:35,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:35,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:08:35,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 20:08:35,198 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:35,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:35,198 INFO L85 PathProgramCache]: Analyzing trace with hash -898504181, now seen corresponding path program 10 times [2024-06-21 20:08:35,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:35,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953492274] [2024-06-21 20:08:35,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:35,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:35,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:35,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:35,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953492274] [2024-06-21 20:08:35,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953492274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:35,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:35,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:35,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848604527] [2024-06-21 20:08:35,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:35,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:35,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:35,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:35,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:35,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:35,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 587 transitions, 8576 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:35,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:35,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:35,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:37,027 INFO L124 PetriNetUnfolderBase]: 4709/7866 cut-off events. [2024-06-21 20:08:37,028 INFO L125 PetriNetUnfolderBase]: For 1748961/1748976 co-relation queries the response was YES. [2024-06-21 20:08:37,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71602 conditions, 7866 events. 4709/7866 cut-off events. For 1748961/1748976 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 55405 event pairs, 1286 based on Foata normal form. 18/7872 useless extension candidates. Maximal degree in co-relation 71394. Up to 6646 conditions per place. [2024-06-21 20:08:37,155 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 490 selfloop transitions, 120 changer transitions 0/617 dead transitions. [2024-06-21 20:08:37,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 617 transitions, 10136 flow [2024-06-21 20:08:37,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:37,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:37,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 20:08:37,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-21 20:08:37,156 INFO L175 Difference]: Start difference. First operand has 480 places, 587 transitions, 8576 flow. Second operand 8 states and 189 transitions. [2024-06-21 20:08:37,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 617 transitions, 10136 flow [2024-06-21 20:08:41,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 617 transitions, 9837 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 20:08:41,340 INFO L231 Difference]: Finished difference. Result has 482 places, 587 transitions, 8521 flow [2024-06-21 20:08:41,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8277, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8521, PETRI_PLACES=482, PETRI_TRANSITIONS=587} [2024-06-21 20:08:41,340 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 441 predicate places. [2024-06-21 20:08:41,340 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 587 transitions, 8521 flow [2024-06-21 20:08:41,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:41,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:41,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:08:41,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 20:08:41,341 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:41,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:41,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1236150061, now seen corresponding path program 11 times [2024-06-21 20:08:41,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:41,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448394439] [2024-06-21 20:08:41,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:41,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:41,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:41,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448394439] [2024-06-21 20:08:41,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448394439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:41,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:41,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:08:41,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584844608] [2024-06-21 20:08:41,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:41,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:08:41,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:41,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:08:41,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:08:41,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:41,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 587 transitions, 8521 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:41,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:41,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:41,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:43,234 INFO L124 PetriNetUnfolderBase]: 4691/7833 cut-off events. [2024-06-21 20:08:43,234 INFO L125 PetriNetUnfolderBase]: For 1738589/1738592 co-relation queries the response was YES. [2024-06-21 20:08:43,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70685 conditions, 7833 events. 4691/7833 cut-off events. For 1738589/1738592 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 55111 event pairs, 1309 based on Foata normal form. 10/7831 useless extension candidates. Maximal degree in co-relation 70476. Up to 7036 conditions per place. [2024-06-21 20:08:43,360 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 470 selfloop transitions, 140 changer transitions 0/617 dead transitions. [2024-06-21 20:08:43,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 617 transitions, 9833 flow [2024-06-21 20:08:43,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:08:43,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:08:43,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-21 20:08:43,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675 [2024-06-21 20:08:43,361 INFO L175 Difference]: Start difference. First operand has 482 places, 587 transitions, 8521 flow. Second operand 10 states and 227 transitions. [2024-06-21 20:08:43,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 617 transitions, 9833 flow [2024-06-21 20:08:47,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 617 transitions, 9616 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:08:47,768 INFO L231 Difference]: Finished difference. Result has 487 places, 587 transitions, 8589 flow [2024-06-21 20:08:47,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8304, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8589, PETRI_PLACES=487, PETRI_TRANSITIONS=587} [2024-06-21 20:08:47,768 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 446 predicate places. [2024-06-21 20:08:47,768 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 587 transitions, 8589 flow [2024-06-21 20:08:47,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:47,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:47,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:08:47,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 20:08:47,768 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:47,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:47,769 INFO L85 PathProgramCache]: Analyzing trace with hash -332798733, now seen corresponding path program 11 times [2024-06-21 20:08:47,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:47,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750214409] [2024-06-21 20:08:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:47,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:47,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:47,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750214409] [2024-06-21 20:08:47,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750214409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:47,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:47,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:47,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090268733] [2024-06-21 20:08:47,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:47,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:47,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:47,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:47,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:47,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:47,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 587 transitions, 8589 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:47,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:47,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:47,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:49,566 INFO L124 PetriNetUnfolderBase]: 4673/7820 cut-off events. [2024-06-21 20:08:49,566 INFO L125 PetriNetUnfolderBase]: For 1715901/1715916 co-relation queries the response was YES. [2024-06-21 20:08:49,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69734 conditions, 7820 events. 4673/7820 cut-off events. For 1715901/1715916 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 55132 event pairs, 1314 based on Foata normal form. 20/7834 useless extension candidates. Maximal degree in co-relation 69524. Up to 7022 conditions per place. [2024-06-21 20:08:49,687 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 497 selfloop transitions, 105 changer transitions 0/609 dead transitions. [2024-06-21 20:08:49,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 609 transitions, 9863 flow [2024-06-21 20:08:49,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:49,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 20:08:49,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-21 20:08:49,688 INFO L175 Difference]: Start difference. First operand has 487 places, 587 transitions, 8589 flow. Second operand 8 states and 183 transitions. [2024-06-21 20:08:49,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 609 transitions, 9863 flow [2024-06-21 20:08:53,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 609 transitions, 9574 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 20:08:53,847 INFO L231 Difference]: Finished difference. Result has 487 places, 587 transitions, 8515 flow [2024-06-21 20:08:53,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8300, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8515, PETRI_PLACES=487, PETRI_TRANSITIONS=587} [2024-06-21 20:08:53,847 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 446 predicate places. [2024-06-21 20:08:53,847 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 587 transitions, 8515 flow [2024-06-21 20:08:53,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:53,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:53,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:08:53,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 20:08:53,848 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:08:53,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:53,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1236002191, now seen corresponding path program 12 times [2024-06-21 20:08:53,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:53,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875811135] [2024-06-21 20:08:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:53,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:53,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:53,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875811135] [2024-06-21 20:08:53,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875811135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:53,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:53,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:08:53,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254564660] [2024-06-21 20:08:53,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:53,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:08:53,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:53,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:08:53,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:08:54,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:54,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 587 transitions, 8515 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:54,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:54,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:54,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:55,772 INFO L124 PetriNetUnfolderBase]: 4660/7786 cut-off events. [2024-06-21 20:08:55,772 INFO L125 PetriNetUnfolderBase]: For 1688945/1688948 co-relation queries the response was YES. [2024-06-21 20:08:55,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68989 conditions, 7786 events. 4660/7786 cut-off events. For 1688945/1688948 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 54827 event pairs, 1286 based on Foata normal form. 8/7780 useless extension candidates. Maximal degree in co-relation 68778. Up to 6961 conditions per place. [2024-06-21 20:08:55,896 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 471 selfloop transitions, 143 changer transitions 0/621 dead transitions. [2024-06-21 20:08:55,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 621 transitions, 9855 flow [2024-06-21 20:08:55,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:08:55,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:08:55,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-21 20:08:55,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5613636363636364 [2024-06-21 20:08:55,897 INFO L175 Difference]: Start difference. First operand has 487 places, 587 transitions, 8515 flow. Second operand 11 states and 247 transitions. [2024-06-21 20:08:55,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 621 transitions, 9855 flow [2024-06-21 20:09:00,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 621 transitions, 9634 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 20:09:00,574 INFO L231 Difference]: Finished difference. Result has 492 places, 587 transitions, 8584 flow [2024-06-21 20:09:00,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8294, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8584, PETRI_PLACES=492, PETRI_TRANSITIONS=587} [2024-06-21 20:09:00,574 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 451 predicate places. [2024-06-21 20:09:00,575 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 587 transitions, 8584 flow [2024-06-21 20:09:00,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:00,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:00,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:09:00,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 20:09:00,575 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:00,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:00,576 INFO L85 PathProgramCache]: Analyzing trace with hash -809938421, now seen corresponding path program 12 times [2024-06-21 20:09:00,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:00,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104082225] [2024-06-21 20:09:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:00,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:00,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:00,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104082225] [2024-06-21 20:09:00,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104082225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:00,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:00,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:09:00,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177719809] [2024-06-21 20:09:00,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:00,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:09:00,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:00,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:09:00,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:09:00,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:00,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 587 transitions, 8584 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:00,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:00,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:00,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:02,408 INFO L124 PetriNetUnfolderBase]: 4647/7784 cut-off events. [2024-06-21 20:09:02,408 INFO L125 PetriNetUnfolderBase]: For 1676008/1676023 co-relation queries the response was YES. [2024-06-21 20:09:02,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68430 conditions, 7784 events. 4647/7784 cut-off events. For 1676008/1676023 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 54904 event pairs, 1294 based on Foata normal form. 18/7794 useless extension candidates. Maximal degree in co-relation 68218. Up to 6922 conditions per place. [2024-06-21 20:09:02,530 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 497 selfloop transitions, 108 changer transitions 0/612 dead transitions. [2024-06-21 20:09:02,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 612 transitions, 9880 flow [2024-06-21 20:09:02,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:09:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:09:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 20:09:02,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-21 20:09:02,531 INFO L175 Difference]: Start difference. First operand has 492 places, 587 transitions, 8584 flow. Second operand 8 states and 185 transitions. [2024-06-21 20:09:02,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 612 transitions, 9880 flow [2024-06-21 20:09:06,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 612 transitions, 9584 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 20:09:06,599 INFO L231 Difference]: Finished difference. Result has 492 places, 587 transitions, 8508 flow [2024-06-21 20:09:06,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8288, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8508, PETRI_PLACES=492, PETRI_TRANSITIONS=587} [2024-06-21 20:09:06,600 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 451 predicate places. [2024-06-21 20:09:06,600 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 587 transitions, 8508 flow [2024-06-21 20:09:06,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:06,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:06,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:09:06,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 20:09:06,600 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:06,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:06,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1188599337, now seen corresponding path program 13 times [2024-06-21 20:09:06,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:06,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520111426] [2024-06-21 20:09:06,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:06,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:06,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:06,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520111426] [2024-06-21 20:09:06,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520111426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:06,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:06,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:09:06,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823593856] [2024-06-21 20:09:06,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:06,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:09:06,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:06,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:09:06,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:09:06,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:06,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 587 transitions, 8508 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:06,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:06,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:06,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:08,594 INFO L124 PetriNetUnfolderBase]: 4894/8166 cut-off events. [2024-06-21 20:09:08,594 INFO L125 PetriNetUnfolderBase]: For 2013280/2013280 co-relation queries the response was YES. [2024-06-21 20:09:08,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75525 conditions, 8166 events. 4894/8166 cut-off events. For 2013280/2013280 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 57810 event pairs, 1390 based on Foata normal form. 8/8165 useless extension candidates. Maximal degree in co-relation 75312. Up to 6894 conditions per place. [2024-06-21 20:09:08,725 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 478 selfloop transitions, 147 changer transitions 0/632 dead transitions. [2024-06-21 20:09:08,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 632 transitions, 10220 flow [2024-06-21 20:09:08,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:09:08,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:09:08,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-21 20:09:08,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277777777777778 [2024-06-21 20:09:08,726 INFO L175 Difference]: Start difference. First operand has 492 places, 587 transitions, 8508 flow. Second operand 9 states and 226 transitions. [2024-06-21 20:09:08,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 632 transitions, 10220 flow [2024-06-21 20:09:14,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 632 transitions, 10003 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 20:09:14,867 INFO L231 Difference]: Finished difference. Result has 497 places, 590 transitions, 8685 flow [2024-06-21 20:09:14,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8291, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8685, PETRI_PLACES=497, PETRI_TRANSITIONS=590} [2024-06-21 20:09:14,867 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 456 predicate places. [2024-06-21 20:09:14,867 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 590 transitions, 8685 flow [2024-06-21 20:09:14,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:14,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:14,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:09:14,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 20:09:14,868 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:14,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:14,868 INFO L85 PathProgramCache]: Analyzing trace with hash -684372117, now seen corresponding path program 14 times [2024-06-21 20:09:14,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:14,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255492465] [2024-06-21 20:09:14,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:14,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:14,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:14,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255492465] [2024-06-21 20:09:14,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255492465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:14,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:14,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:09:14,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250779877] [2024-06-21 20:09:14,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:14,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:09:14,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:14,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:09:14,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:09:15,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:15,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 590 transitions, 8685 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:15,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:15,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:15,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:16,895 INFO L124 PetriNetUnfolderBase]: 4922/8210 cut-off events. [2024-06-21 20:09:16,895 INFO L125 PetriNetUnfolderBase]: For 2048894/2048894 co-relation queries the response was YES. [2024-06-21 20:09:17,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76372 conditions, 8210 events. 4922/8210 cut-off events. For 2048894/2048894 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 58255 event pairs, 1410 based on Foata normal form. 8/8209 useless extension candidates. Maximal degree in co-relation 76157. Up to 7365 conditions per place. [2024-06-21 20:09:17,039 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 471 selfloop transitions, 145 changer transitions 0/623 dead transitions. [2024-06-21 20:09:17,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 623 transitions, 10044 flow [2024-06-21 20:09:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:09:17,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:09:17,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-21 20:09:17,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-21 20:09:17,049 INFO L175 Difference]: Start difference. First operand has 497 places, 590 transitions, 8685 flow. Second operand 9 states and 217 transitions. [2024-06-21 20:09:17,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 623 transitions, 10044 flow [2024-06-21 20:09:22,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 623 transitions, 9823 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:09:22,836 INFO L231 Difference]: Finished difference. Result has 501 places, 591 transitions, 8790 flow [2024-06-21 20:09:22,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8470, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8790, PETRI_PLACES=501, PETRI_TRANSITIONS=591} [2024-06-21 20:09:22,836 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 460 predicate places. [2024-06-21 20:09:22,836 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 591 transitions, 8790 flow [2024-06-21 20:09:22,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:22,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:22,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:09:22,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 20:09:22,836 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:22,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:22,837 INFO L85 PathProgramCache]: Analyzing trace with hash 965177641, now seen corresponding path program 15 times [2024-06-21 20:09:22,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:22,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033329575] [2024-06-21 20:09:22,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:22,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:22,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:22,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033329575] [2024-06-21 20:09:22,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033329575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:22,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:22,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:09:22,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436239315] [2024-06-21 20:09:22,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:22,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:09:22,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:22,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:09:22,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:09:22,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:22,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 591 transitions, 8790 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:22,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:22,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:22,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:25,059 INFO L124 PetriNetUnfolderBase]: 5328/8876 cut-off events. [2024-06-21 20:09:25,059 INFO L125 PetriNetUnfolderBase]: For 2619744/2619744 co-relation queries the response was YES. [2024-06-21 20:09:25,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89056 conditions, 8876 events. 5328/8876 cut-off events. For 2619744/2619744 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 63626 event pairs, 1518 based on Foata normal form. 6/8869 useless extension candidates. Maximal degree in co-relation 88839. Up to 6683 conditions per place. [2024-06-21 20:09:25,220 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 482 selfloop transitions, 155 changer transitions 0/644 dead transitions. [2024-06-21 20:09:25,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 644 transitions, 10858 flow [2024-06-21 20:09:25,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:09:25,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:09:25,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-21 20:09:25,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-21 20:09:25,221 INFO L175 Difference]: Start difference. First operand has 501 places, 591 transitions, 8790 flow. Second operand 9 states and 230 transitions. [2024-06-21 20:09:25,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 644 transitions, 10858 flow [2024-06-21 20:09:32,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 644 transitions, 10561 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 20:09:32,703 INFO L231 Difference]: Finished difference. Result has 504 places, 596 transitions, 8951 flow [2024-06-21 20:09:32,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8493, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8951, PETRI_PLACES=504, PETRI_TRANSITIONS=596} [2024-06-21 20:09:32,704 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 463 predicate places. [2024-06-21 20:09:32,704 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 596 transitions, 8951 flow [2024-06-21 20:09:32,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:32,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:32,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:09:32,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 20:09:32,704 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:32,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:32,704 INFO L85 PathProgramCache]: Analyzing trace with hash -834925911, now seen corresponding path program 13 times [2024-06-21 20:09:32,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:32,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801095417] [2024-06-21 20:09:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:32,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:32,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:32,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801095417] [2024-06-21 20:09:32,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801095417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:32,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:32,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:09:32,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533610602] [2024-06-21 20:09:32,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:32,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:09:32,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:32,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:09:32,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:09:32,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:32,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 596 transitions, 8951 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:32,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:32,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:32,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:35,096 INFO L124 PetriNetUnfolderBase]: 5315/8864 cut-off events. [2024-06-21 20:09:35,097 INFO L125 PetriNetUnfolderBase]: For 2623421/2623436 co-relation queries the response was YES. [2024-06-21 20:09:35,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88858 conditions, 8864 events. 5315/8864 cut-off events. For 2623421/2623436 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 63479 event pairs, 1318 based on Foata normal form. 18/8876 useless extension candidates. Maximal degree in co-relation 88639. Up to 7541 conditions per place. [2024-06-21 20:09:35,241 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 515 selfloop transitions, 103 changer transitions 0/625 dead transitions. [2024-06-21 20:09:35,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 625 transitions, 10525 flow [2024-06-21 20:09:35,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:09:35,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:09:35,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 20:09:35,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-21 20:09:35,242 INFO L175 Difference]: Start difference. First operand has 504 places, 596 transitions, 8951 flow. Second operand 7 states and 172 transitions. [2024-06-21 20:09:35,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 625 transitions, 10525 flow [2024-06-21 20:09:41,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 625 transitions, 10298 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 20:09:41,610 INFO L231 Difference]: Finished difference. Result has 507 places, 596 transitions, 8937 flow [2024-06-21 20:09:41,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8724, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8937, PETRI_PLACES=507, PETRI_TRANSITIONS=596} [2024-06-21 20:09:41,610 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 466 predicate places. [2024-06-21 20:09:41,610 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 596 transitions, 8937 flow [2024-06-21 20:09:41,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:41,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:41,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:09:41,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 20:09:41,611 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:41,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:41,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1046616237, now seen corresponding path program 16 times [2024-06-21 20:09:41,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:41,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950884693] [2024-06-21 20:09:41,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:41,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:41,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:41,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950884693] [2024-06-21 20:09:41,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950884693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:41,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:41,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:09:41,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563106319] [2024-06-21 20:09:41,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:41,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:09:41,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:41,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:09:41,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:09:41,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:41,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 596 transitions, 8937 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:41,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:41,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:41,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:44,170 INFO L124 PetriNetUnfolderBase]: 5302/8824 cut-off events. [2024-06-21 20:09:44,170 INFO L125 PetriNetUnfolderBase]: For 2618543/2618546 co-relation queries the response was YES. [2024-06-21 20:09:44,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88406 conditions, 8824 events. 5302/8824 cut-off events. For 2618543/2618546 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 63231 event pairs, 1593 based on Foata normal form. 8/8812 useless extension candidates. Maximal degree in co-relation 88185. Up to 8081 conditions per place. [2024-06-21 20:09:44,442 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 557 selfloop transitions, 68 changer transitions 0/632 dead transitions. [2024-06-21 20:09:44,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 632 transitions, 10303 flow [2024-06-21 20:09:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:09:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:09:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-21 20:09:44,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-06-21 20:09:44,443 INFO L175 Difference]: Start difference. First operand has 507 places, 596 transitions, 8937 flow. Second operand 9 states and 214 transitions. [2024-06-21 20:09:44,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 632 transitions, 10303 flow [2024-06-21 20:09:51,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 632 transitions, 10002 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 20:09:51,750 INFO L231 Difference]: Finished difference. Result has 508 places, 596 transitions, 8776 flow [2024-06-21 20:09:51,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8636, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8776, PETRI_PLACES=508, PETRI_TRANSITIONS=596} [2024-06-21 20:09:51,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 467 predicate places. [2024-06-21 20:09:51,750 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 596 transitions, 8776 flow [2024-06-21 20:09:51,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:51,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:51,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:09:51,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 20:09:51,751 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:09:51,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:51,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1231142761, now seen corresponding path program 17 times [2024-06-21 20:09:51,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:51,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088802364] [2024-06-21 20:09:51,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:51,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:51,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:51,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088802364] [2024-06-21 20:09:51,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088802364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:51,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:51,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:09:51,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634721072] [2024-06-21 20:09:51,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:51,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:09:51,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:51,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:09:51,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:09:51,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:51,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 596 transitions, 8776 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:51,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:51,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:51,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:54,316 INFO L124 PetriNetUnfolderBase]: 5284/8819 cut-off events. [2024-06-21 20:09:54,316 INFO L125 PetriNetUnfolderBase]: For 2608143/2608146 co-relation queries the response was YES. [2024-06-21 20:09:54,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87051 conditions, 8819 events. 5284/8819 cut-off events. For 2608143/2608146 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 63330 event pairs, 1616 based on Foata normal form. 10/8824 useless extension candidates. Maximal degree in co-relation 86830. Up to 8118 conditions per place. [2024-06-21 20:09:54,455 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 554 selfloop transitions, 64 changer transitions 0/625 dead transitions. [2024-06-21 20:09:54,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 625 transitions, 10102 flow [2024-06-21 20:09:54,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:09:54,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:09:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 20:09:54,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-21 20:09:54,456 INFO L175 Difference]: Start difference. First operand has 508 places, 596 transitions, 8776 flow. Second operand 9 states and 208 transitions. [2024-06-21 20:09:54,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 625 transitions, 10102 flow [2024-06-21 20:10:02,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 625 transitions, 9986 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:10:02,154 INFO L231 Difference]: Finished difference. Result has 512 places, 596 transitions, 8793 flow [2024-06-21 20:10:02,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8660, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8793, PETRI_PLACES=512, PETRI_TRANSITIONS=596} [2024-06-21 20:10:02,155 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 471 predicate places. [2024-06-21 20:10:02,155 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 596 transitions, 8793 flow [2024-06-21 20:10:02,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:02,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:02,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:10:02,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-21 20:10:02,155 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:02,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:02,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1965560595, now seen corresponding path program 18 times [2024-06-21 20:10:02,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:02,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671069838] [2024-06-21 20:10:02,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:02,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:02,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:02,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671069838] [2024-06-21 20:10:02,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671069838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:02,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:02,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:10:02,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119492851] [2024-06-21 20:10:02,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:02,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:10:02,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:02,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:10:02,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:10:02,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:10:02,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 596 transitions, 8793 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:02,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:02,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:10:02,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:04,716 INFO L124 PetriNetUnfolderBase]: 5312/8864 cut-off events. [2024-06-21 20:10:04,716 INFO L125 PetriNetUnfolderBase]: For 2650271/2650271 co-relation queries the response was YES. [2024-06-21 20:10:04,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87656 conditions, 8864 events. 5312/8864 cut-off events. For 2650271/2650271 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 63718 event pairs, 1618 based on Foata normal form. 8/8863 useless extension candidates. Maximal degree in co-relation 87434. Up to 7610 conditions per place. [2024-06-21 20:10:04,857 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 490 selfloop transitions, 150 changer transitions 0/647 dead transitions. [2024-06-21 20:10:04,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 647 transitions, 10517 flow [2024-06-21 20:10:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:10:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:10:04,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 270 transitions. [2024-06-21 20:10:04,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-06-21 20:10:04,858 INFO L175 Difference]: Start difference. First operand has 512 places, 596 transitions, 8793 flow. Second operand 11 states and 270 transitions. [2024-06-21 20:10:04,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 647 transitions, 10517 flow [2024-06-21 20:10:12,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 647 transitions, 10384 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 20:10:12,268 INFO L231 Difference]: Finished difference. Result has 516 places, 597 transitions, 8990 flow [2024-06-21 20:10:12,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8660, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8990, PETRI_PLACES=516, PETRI_TRANSITIONS=597} [2024-06-21 20:10:12,268 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 475 predicate places. [2024-06-21 20:10:12,268 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 597 transitions, 8990 flow [2024-06-21 20:10:12,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:12,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:12,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:10:12,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-21 20:10:12,269 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:12,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:12,269 INFO L85 PathProgramCache]: Analyzing trace with hash 173907767, now seen corresponding path program 19 times [2024-06-21 20:10:12,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:12,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754470022] [2024-06-21 20:10:12,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:12,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:12,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:12,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754470022] [2024-06-21 20:10:12,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754470022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:12,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:12,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:10:12,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107554756] [2024-06-21 20:10:12,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:12,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:10:12,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:12,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:10:12,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:10:12,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:10:12,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 597 transitions, 8990 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:12,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:12,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:10:12,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:14,990 INFO L124 PetriNetUnfolderBase]: 5340/8908 cut-off events. [2024-06-21 20:10:14,990 INFO L125 PetriNetUnfolderBase]: For 2694678/2694678 co-relation queries the response was YES. [2024-06-21 20:10:15,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88547 conditions, 8908 events. 5340/8908 cut-off events. For 2694678/2694678 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 64068 event pairs, 1638 based on Foata normal form. 8/8907 useless extension candidates. Maximal degree in co-relation 88324. Up to 8035 conditions per place. [2024-06-21 20:10:15,140 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 482 selfloop transitions, 149 changer transitions 0/638 dead transitions. [2024-06-21 20:10:15,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 638 transitions, 10398 flow [2024-06-21 20:10:15,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:10:15,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:10:15,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 261 transitions. [2024-06-21 20:10:15,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5931818181818181 [2024-06-21 20:10:15,141 INFO L175 Difference]: Start difference. First operand has 516 places, 597 transitions, 8990 flow. Second operand 11 states and 261 transitions. [2024-06-21 20:10:15,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 638 transitions, 10398 flow [2024-06-21 20:10:23,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 638 transitions, 9954 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-21 20:10:23,227 INFO L231 Difference]: Finished difference. Result has 517 places, 598 transitions, 8879 flow [2024-06-21 20:10:23,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8554, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8879, PETRI_PLACES=517, PETRI_TRANSITIONS=598} [2024-06-21 20:10:23,228 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 476 predicate places. [2024-06-21 20:10:23,228 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 598 transitions, 8879 flow [2024-06-21 20:10:23,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:23,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:23,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:10:23,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-21 20:10:23,228 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:23,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:23,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2033948491, now seen corresponding path program 20 times [2024-06-21 20:10:23,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:23,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695516153] [2024-06-21 20:10:23,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:23,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:23,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:23,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695516153] [2024-06-21 20:10:23,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695516153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:23,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:23,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:10:23,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198935166] [2024-06-21 20:10:23,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:23,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:10:23,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:23,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:10:23,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:10:23,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:10:23,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 598 transitions, 8879 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:23,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:23,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:10:23,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:25,712 INFO L124 PetriNetUnfolderBase]: 5368/8948 cut-off events. [2024-06-21 20:10:25,712 INFO L125 PetriNetUnfolderBase]: For 2734937/2734937 co-relation queries the response was YES. [2024-06-21 20:10:25,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88562 conditions, 8948 events. 5368/8948 cut-off events. For 2734937/2734937 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 64316 event pairs, 1640 based on Foata normal form. 8/8947 useless extension candidates. Maximal degree in co-relation 88339. Up to 8079 conditions per place. [2024-06-21 20:10:25,862 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 479 selfloop transitions, 151 changer transitions 0/637 dead transitions. [2024-06-21 20:10:25,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 637 transitions, 10273 flow [2024-06-21 20:10:25,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:10:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:10:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 274 transitions. [2024-06-21 20:10:25,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-21 20:10:25,863 INFO L175 Difference]: Start difference. First operand has 517 places, 598 transitions, 8879 flow. Second operand 12 states and 274 transitions. [2024-06-21 20:10:25,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 637 transitions, 10273 flow [2024-06-21 20:10:33,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 637 transitions, 9970 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 20:10:33,669 INFO L231 Difference]: Finished difference. Result has 520 places, 599 transitions, 8907 flow [2024-06-21 20:10:33,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8576, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8907, PETRI_PLACES=520, PETRI_TRANSITIONS=599} [2024-06-21 20:10:33,670 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 479 predicate places. [2024-06-21 20:10:33,670 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 599 transitions, 8907 flow [2024-06-21 20:10:33,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:33,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:33,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:10:33,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-21 20:10:33,670 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:33,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:33,670 INFO L85 PathProgramCache]: Analyzing trace with hash -827507301, now seen corresponding path program 14 times [2024-06-21 20:10:33,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:33,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977967684] [2024-06-21 20:10:33,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:33,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:33,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:33,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977967684] [2024-06-21 20:10:33,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977967684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:33,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:33,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:10:33,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721470904] [2024-06-21 20:10:33,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:33,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:10:33,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:33,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:10:33,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:10:33,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:10:33,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 599 transitions, 8907 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:33,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:33,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:10:33,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:36,099 INFO L124 PetriNetUnfolderBase]: 5350/8931 cut-off events. [2024-06-21 20:10:36,099 INFO L125 PetriNetUnfolderBase]: For 2714125/2714140 co-relation queries the response was YES. [2024-06-21 20:10:36,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87726 conditions, 8931 events. 5350/8931 cut-off events. For 2714125/2714140 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 64387 event pairs, 1633 based on Foata normal form. 20/8945 useless extension candidates. Maximal degree in co-relation 87502. Up to 8117 conditions per place. [2024-06-21 20:10:36,250 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 530 selfloop transitions, 83 changer transitions 0/620 dead transitions. [2024-06-21 20:10:36,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 620 transitions, 10201 flow [2024-06-21 20:10:36,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:10:36,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:10:36,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 20:10:36,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-21 20:10:36,252 INFO L175 Difference]: Start difference. First operand has 520 places, 599 transitions, 8907 flow. Second operand 7 states and 165 transitions. [2024-06-21 20:10:36,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 620 transitions, 10201 flow [2024-06-21 20:10:43,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 620 transitions, 9884 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-21 20:10:43,873 INFO L231 Difference]: Finished difference. Result has 517 places, 599 transitions, 8764 flow [2024-06-21 20:10:43,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8590, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8764, PETRI_PLACES=517, PETRI_TRANSITIONS=599} [2024-06-21 20:10:43,873 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 476 predicate places. [2024-06-21 20:10:43,873 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 599 transitions, 8764 flow [2024-06-21 20:10:43,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:43,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:43,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:10:43,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-21 20:10:43,873 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:43,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:43,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1312313517, now seen corresponding path program 21 times [2024-06-21 20:10:43,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:43,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429684275] [2024-06-21 20:10:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:43,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:43,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:43,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429684275] [2024-06-21 20:10:43,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429684275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:43,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:43,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:10:43,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725308518] [2024-06-21 20:10:43,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:43,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:10:43,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:43,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:10:43,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:10:44,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:10:44,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 599 transitions, 8764 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:44,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:44,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:10:44,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:46,301 INFO L124 PetriNetUnfolderBase]: 5337/8908 cut-off events. [2024-06-21 20:10:46,301 INFO L125 PetriNetUnfolderBase]: For 2687256/2687259 co-relation queries the response was YES. [2024-06-21 20:10:46,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86876 conditions, 8908 events. 5337/8908 cut-off events. For 2687256/2687259 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 64173 event pairs, 1607 based on Foata normal form. 8/8909 useless extension candidates. Maximal degree in co-relation 86651. Up to 8175 conditions per place. [2024-06-21 20:10:46,447 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 558 selfloop transitions, 67 changer transitions 0/632 dead transitions. [2024-06-21 20:10:46,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 632 transitions, 10124 flow [2024-06-21 20:10:46,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:10:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:10:46,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-21 20:10:46,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-06-21 20:10:46,448 INFO L175 Difference]: Start difference. First operand has 517 places, 599 transitions, 8764 flow. Second operand 10 states and 228 transitions. [2024-06-21 20:10:46,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 632 transitions, 10124 flow [2024-06-21 20:10:54,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 632 transitions, 9949 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:10:54,584 INFO L231 Difference]: Finished difference. Result has 521 places, 599 transitions, 8727 flow [2024-06-21 20:10:54,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8589, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8727, PETRI_PLACES=521, PETRI_TRANSITIONS=599} [2024-06-21 20:10:54,585 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 480 predicate places. [2024-06-21 20:10:54,585 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 599 transitions, 8727 flow [2024-06-21 20:10:54,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:54,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:10:54,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:10:54,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-21 20:10:54,585 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:10:54,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:10:54,585 INFO L85 PathProgramCache]: Analyzing trace with hash -827516601, now seen corresponding path program 15 times [2024-06-21 20:10:54,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:10:54,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377820252] [2024-06-21 20:10:54,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:10:54,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:10:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:10:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:10:54,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:10:54,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377820252] [2024-06-21 20:10:54,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377820252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:10:54,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:10:54,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:10:54,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686876163] [2024-06-21 20:10:54,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:10:54,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:10:54,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:10:54,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:10:54,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:10:54,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:10:54,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 599 transitions, 8727 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:10:54,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:10:54,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:10:54,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:10:57,017 INFO L124 PetriNetUnfolderBase]: 5324/8891 cut-off events. [2024-06-21 20:10:57,017 INFO L125 PetriNetUnfolderBase]: For 2679662/2679677 co-relation queries the response was YES. [2024-06-21 20:10:57,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86282 conditions, 8891 events. 5324/8891 cut-off events. For 2679662/2679677 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 64049 event pairs, 1593 based on Foata normal form. 18/8901 useless extension candidates. Maximal degree in co-relation 86056. Up to 8009 conditions per place. [2024-06-21 20:10:57,160 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 528 selfloop transitions, 88 changer transitions 0/623 dead transitions. [2024-06-21 20:10:57,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 623 transitions, 10043 flow [2024-06-21 20:10:57,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:10:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:10:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:10:57,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:10:57,161 INFO L175 Difference]: Start difference. First operand has 521 places, 599 transitions, 8727 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:10:57,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 623 transitions, 10043 flow [2024-06-21 20:11:04,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 623 transitions, 9897 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 20:11:04,529 INFO L231 Difference]: Finished difference. Result has 521 places, 599 transitions, 8764 flow [2024-06-21 20:11:04,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8581, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8764, PETRI_PLACES=521, PETRI_TRANSITIONS=599} [2024-06-21 20:11:04,530 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 480 predicate places. [2024-06-21 20:11:04,530 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 599 transitions, 8764 flow [2024-06-21 20:11:04,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:04,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:04,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:11:04,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-21 20:11:04,530 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:04,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:04,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1532367685, now seen corresponding path program 16 times [2024-06-21 20:11:04,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:04,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735300521] [2024-06-21 20:11:04,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:04,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:04,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:04,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735300521] [2024-06-21 20:11:04,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735300521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:04,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:04,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:11:04,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918288980] [2024-06-21 20:11:04,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:04,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:11:04,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:04,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:11:04,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:11:04,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:11:04,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 599 transitions, 8764 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:04,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:04,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:11:04,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:07,044 INFO L124 PetriNetUnfolderBase]: 5352/8941 cut-off events. [2024-06-21 20:11:07,044 INFO L125 PetriNetUnfolderBase]: For 2738961/2738976 co-relation queries the response was YES. [2024-06-21 20:11:07,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86870 conditions, 8941 events. 5352/8941 cut-off events. For 2738961/2738976 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 64483 event pairs, 1613 based on Foata normal form. 20/8955 useless extension candidates. Maximal degree in co-relation 86643. Up to 8059 conditions per place. [2024-06-21 20:11:07,191 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 524 selfloop transitions, 89 changer transitions 0/620 dead transitions. [2024-06-21 20:11:07,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 620 transitions, 10077 flow [2024-06-21 20:11:07,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:11:07,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:11:07,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 20:11:07,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-21 20:11:07,192 INFO L175 Difference]: Start difference. First operand has 521 places, 599 transitions, 8764 flow. Second operand 6 states and 146 transitions. [2024-06-21 20:11:07,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 620 transitions, 10077 flow [2024-06-21 20:11:14,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 620 transitions, 9850 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:11:14,757 INFO L231 Difference]: Finished difference. Result has 520 places, 600 transitions, 8752 flow [2024-06-21 20:11:14,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8537, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8752, PETRI_PLACES=520, PETRI_TRANSITIONS=600} [2024-06-21 20:11:14,758 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 479 predicate places. [2024-06-21 20:11:14,758 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 600 transitions, 8752 flow [2024-06-21 20:11:14,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:14,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:14,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:11:14,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-21 20:11:14,759 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:14,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:14,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1537551319, now seen corresponding path program 22 times [2024-06-21 20:11:14,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:14,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242634864] [2024-06-21 20:11:14,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:14,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:14,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:14,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242634864] [2024-06-21 20:11:14,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242634864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:14,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:14,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:11:14,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718801912] [2024-06-21 20:11:14,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:14,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:11:14,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:14,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:11:14,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:11:14,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:11:14,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 600 transitions, 8752 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:14,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:14,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:11:14,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:17,391 INFO L124 PetriNetUnfolderBase]: 5380/8983 cut-off events. [2024-06-21 20:11:17,391 INFO L125 PetriNetUnfolderBase]: For 2776263/2776266 co-relation queries the response was YES. [2024-06-21 20:11:17,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87509 conditions, 8983 events. 5380/8983 cut-off events. For 2776263/2776266 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 64836 event pairs, 1618 based on Foata normal form. 10/8988 useless extension candidates. Maximal degree in co-relation 87281. Up to 8265 conditions per place. [2024-06-21 20:11:17,542 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 551 selfloop transitions, 74 changer transitions 0/632 dead transitions. [2024-06-21 20:11:17,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 632 transitions, 10120 flow [2024-06-21 20:11:17,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:11:17,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:11:17,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 245 transitions. [2024-06-21 20:11:17,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-21 20:11:17,543 INFO L175 Difference]: Start difference. First operand has 520 places, 600 transitions, 8752 flow. Second operand 11 states and 245 transitions. [2024-06-21 20:11:17,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 632 transitions, 10120 flow [2024-06-21 20:11:25,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 632 transitions, 9928 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 20:11:25,416 INFO L231 Difference]: Finished difference. Result has 525 places, 601 transitions, 8739 flow [2024-06-21 20:11:25,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8560, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8739, PETRI_PLACES=525, PETRI_TRANSITIONS=601} [2024-06-21 20:11:25,417 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 484 predicate places. [2024-06-21 20:11:25,417 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 601 transitions, 8739 flow [2024-06-21 20:11:25,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:25,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:25,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:11:25,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-21 20:11:25,417 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:25,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:25,417 INFO L85 PathProgramCache]: Analyzing trace with hash -265508309, now seen corresponding path program 23 times [2024-06-21 20:11:25,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:25,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910734943] [2024-06-21 20:11:25,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:25,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:25,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:25,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910734943] [2024-06-21 20:11:25,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910734943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:25,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:25,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:11:25,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044781043] [2024-06-21 20:11:25,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:25,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:11:25,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:25,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:11:25,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:11:25,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:11:25,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 601 transitions, 8739 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:25,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:25,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:11:25,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:27,916 INFO L124 PetriNetUnfolderBase]: 5408/9027 cut-off events. [2024-06-21 20:11:27,916 INFO L125 PetriNetUnfolderBase]: For 2735689/2735692 co-relation queries the response was YES. [2024-06-21 20:11:28,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87351 conditions, 9027 events. 5408/9027 cut-off events. For 2735689/2735692 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 65131 event pairs, 1622 based on Foata normal form. 10/9032 useless extension candidates. Maximal degree in co-relation 87124. Up to 8309 conditions per place. [2024-06-21 20:11:28,066 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 554 selfloop transitions, 74 changer transitions 0/635 dead transitions. [2024-06-21 20:11:28,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 635 transitions, 10118 flow [2024-06-21 20:11:28,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:11:28,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:11:28,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 281 transitions. [2024-06-21 20:11:28,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403846153846154 [2024-06-21 20:11:28,081 INFO L175 Difference]: Start difference. First operand has 525 places, 601 transitions, 8739 flow. Second operand 13 states and 281 transitions. [2024-06-21 20:11:28,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 635 transitions, 10118 flow [2024-06-21 20:11:36,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 635 transitions, 9961 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 20:11:36,147 INFO L231 Difference]: Finished difference. Result has 529 places, 602 transitions, 8762 flow [2024-06-21 20:11:36,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8582, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8762, PETRI_PLACES=529, PETRI_TRANSITIONS=602} [2024-06-21 20:11:36,148 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 488 predicate places. [2024-06-21 20:11:36,148 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 602 transitions, 8762 flow [2024-06-21 20:11:36,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:36,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:36,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:11:36,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-21 20:11:36,148 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:36,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:36,149 INFO L85 PathProgramCache]: Analyzing trace with hash -110842327, now seen corresponding path program 17 times [2024-06-21 20:11:36,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:36,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880990278] [2024-06-21 20:11:36,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:36,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:36,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:36,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880990278] [2024-06-21 20:11:36,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880990278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:36,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:36,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:11:36,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26842113] [2024-06-21 20:11:36,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:36,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:11:36,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:36,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:11:36,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:11:36,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:11:36,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 602 transitions, 8762 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:36,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:36,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:11:36,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:38,700 INFO L124 PetriNetUnfolderBase]: 5428/9059 cut-off events. [2024-06-21 20:11:38,700 INFO L125 PetriNetUnfolderBase]: For 2763735/2763750 co-relation queries the response was YES. [2024-06-21 20:11:38,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87812 conditions, 9059 events. 5428/9059 cut-off events. For 2763735/2763750 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 65296 event pairs, 1292 based on Foata normal form. 18/9071 useless extension candidates. Maximal degree in co-relation 87584. Up to 7711 conditions per place. [2024-06-21 20:11:38,853 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 515 selfloop transitions, 108 changer transitions 0/630 dead transitions. [2024-06-21 20:11:38,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 630 transitions, 10385 flow [2024-06-21 20:11:38,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:11:38,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:11:38,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:11:38,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-21 20:11:38,854 INFO L175 Difference]: Start difference. First operand has 529 places, 602 transitions, 8762 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:11:38,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 630 transitions, 10385 flow [2024-06-21 20:11:46,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 630 transitions, 10228 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 20:11:46,113 INFO L231 Difference]: Finished difference. Result has 524 places, 603 transitions, 8861 flow [2024-06-21 20:11:46,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8605, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8861, PETRI_PLACES=524, PETRI_TRANSITIONS=603} [2024-06-21 20:11:46,113 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 483 predicate places. [2024-06-21 20:11:46,113 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 603 transitions, 8861 flow [2024-06-21 20:11:46,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:46,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:46,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:11:46,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-21 20:11:46,114 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:46,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:46,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1532041069, now seen corresponding path program 24 times [2024-06-21 20:11:46,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:46,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692990023] [2024-06-21 20:11:46,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:46,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:46,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:46,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692990023] [2024-06-21 20:11:46,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692990023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:46,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:46,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:11:46,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253968418] [2024-06-21 20:11:46,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:46,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:11:46,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:46,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:11:46,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:11:46,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:11:46,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 603 transitions, 8861 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:46,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:46,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:11:46,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:48,815 INFO L124 PetriNetUnfolderBase]: 5456/9101 cut-off events. [2024-06-21 20:11:48,815 INFO L125 PetriNetUnfolderBase]: For 2804473/2804476 co-relation queries the response was YES. [2024-06-21 20:11:48,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88750 conditions, 9101 events. 5456/9101 cut-off events. For 2804473/2804476 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 65727 event pairs, 1622 based on Foata normal form. 8/9102 useless extension candidates. Maximal degree in co-relation 88521. Up to 8323 conditions per place. [2024-06-21 20:11:48,977 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 557 selfloop transitions, 78 changer transitions 0/642 dead transitions. [2024-06-21 20:11:48,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 642 transitions, 10313 flow [2024-06-21 20:11:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:11:48,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:11:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 283 transitions. [2024-06-21 20:11:48,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5442307692307692 [2024-06-21 20:11:48,978 INFO L175 Difference]: Start difference. First operand has 524 places, 603 transitions, 8861 flow. Second operand 13 states and 283 transitions. [2024-06-21 20:11:48,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 642 transitions, 10313 flow [2024-06-21 20:11:57,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 642 transitions, 10132 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 20:11:57,239 INFO L231 Difference]: Finished difference. Result has 532 places, 606 transitions, 8921 flow [2024-06-21 20:11:57,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8681, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8921, PETRI_PLACES=532, PETRI_TRANSITIONS=606} [2024-06-21 20:11:57,239 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 491 predicate places. [2024-06-21 20:11:57,240 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 606 transitions, 8921 flow [2024-06-21 20:11:57,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:57,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:11:57,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:11:57,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-21 20:11:57,240 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:11:57,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:11:57,240 INFO L85 PathProgramCache]: Analyzing trace with hash -318169849, now seen corresponding path program 18 times [2024-06-21 20:11:57,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:11:57,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262616905] [2024-06-21 20:11:57,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:11:57,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:11:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:11:57,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:11:57,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:11:57,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262616905] [2024-06-21 20:11:57,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262616905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:11:57,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:11:57,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:11:57,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181573542] [2024-06-21 20:11:57,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:11:57,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:11:57,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:11:57,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:11:57,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:11:57,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:11:57,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 606 transitions, 8921 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:11:57,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:11:57,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:11:57,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:11:59,793 INFO L124 PetriNetUnfolderBase]: 5438/9087 cut-off events. [2024-06-21 20:11:59,793 INFO L125 PetriNetUnfolderBase]: For 2672237/2672252 co-relation queries the response was YES. [2024-06-21 20:11:59,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86712 conditions, 9087 events. 5438/9087 cut-off events. For 2672237/2672252 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 65791 event pairs, 1645 based on Foata normal form. 20/9101 useless extension candidates. Maximal degree in co-relation 86484. Up to 8261 conditions per place. [2024-06-21 20:11:59,941 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 523 selfloop transitions, 98 changer transitions 0/628 dead transitions. [2024-06-21 20:11:59,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 628 transitions, 10233 flow [2024-06-21 20:11:59,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:11:59,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:11:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 20:11:59,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-21 20:11:59,942 INFO L175 Difference]: Start difference. First operand has 532 places, 606 transitions, 8921 flow. Second operand 8 states and 185 transitions. [2024-06-21 20:11:59,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 628 transitions, 10233 flow [2024-06-21 20:12:07,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 628 transitions, 10058 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-21 20:12:07,885 INFO L231 Difference]: Finished difference. Result has 530 places, 606 transitions, 8950 flow [2024-06-21 20:12:07,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8746, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8950, PETRI_PLACES=530, PETRI_TRANSITIONS=606} [2024-06-21 20:12:07,885 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 489 predicate places. [2024-06-21 20:12:07,885 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 606 transitions, 8950 flow [2024-06-21 20:12:07,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:07,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:07,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:07,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-21 20:12:07,885 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:12:07,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:07,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1940782345, now seen corresponding path program 19 times [2024-06-21 20:12:07,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:07,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200589257] [2024-06-21 20:12:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:07,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:07,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:07,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200589257] [2024-06-21 20:12:07,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200589257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:07,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:07,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:12:07,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483520329] [2024-06-21 20:12:07,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:07,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:12:07,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:07,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:12:07,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:12:07,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:12:07,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 606 transitions, 8950 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:07,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:07,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:12:07,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:10,279 INFO L124 PetriNetUnfolderBase]: 5458/9098 cut-off events. [2024-06-21 20:12:10,279 INFO L125 PetriNetUnfolderBase]: For 2696266/2696281 co-relation queries the response was YES. [2024-06-21 20:12:10,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87125 conditions, 9098 events. 5458/9098 cut-off events. For 2696266/2696281 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 65741 event pairs, 1606 based on Foata normal form. 18/9095 useless extension candidates. Maximal degree in co-relation 86896. Up to 7985 conditions per place. [2024-06-21 20:12:10,622 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 510 selfloop transitions, 121 changer transitions 0/638 dead transitions. [2024-06-21 20:12:10,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 638 transitions, 10601 flow [2024-06-21 20:12:10,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:12:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:12:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:12:10,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-21 20:12:10,623 INFO L175 Difference]: Start difference. First operand has 530 places, 606 transitions, 8950 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:12:10,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 638 transitions, 10601 flow [2024-06-21 20:12:17,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 638 transitions, 10341 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 20:12:17,517 INFO L231 Difference]: Finished difference. Result has 529 places, 607 transitions, 8969 flow [2024-06-21 20:12:17,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8692, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8969, PETRI_PLACES=529, PETRI_TRANSITIONS=607} [2024-06-21 20:12:17,518 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 488 predicate places. [2024-06-21 20:12:17,518 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 607 transitions, 8969 flow [2024-06-21 20:12:17,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:17,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:17,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:17,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-21 20:12:17,518 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:12:17,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:17,518 INFO L85 PathProgramCache]: Analyzing trace with hash -409397603, now seen corresponding path program 20 times [2024-06-21 20:12:17,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:17,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206131908] [2024-06-21 20:12:17,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:17,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:17,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:17,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206131908] [2024-06-21 20:12:17,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206131908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:17,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:17,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:12:17,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457967127] [2024-06-21 20:12:17,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:17,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:12:17,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:17,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:12:17,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:12:17,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:12:17,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 607 transitions, 8969 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:17,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:17,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:12:17,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:19,918 INFO L124 PetriNetUnfolderBase]: 5486/9164 cut-off events. [2024-06-21 20:12:19,919 INFO L125 PetriNetUnfolderBase]: For 2713611/2713620 co-relation queries the response was YES. [2024-06-21 20:12:20,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87553 conditions, 9164 events. 5486/9164 cut-off events. For 2713611/2713620 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 66436 event pairs, 1692 based on Foata normal form. 12/9168 useless extension candidates. Maximal degree in co-relation 87324. Up to 8325 conditions per place. [2024-06-21 20:12:20,076 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 502 selfloop transitions, 114 changer transitions 0/623 dead transitions. [2024-06-21 20:12:20,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 623 transitions, 10280 flow [2024-06-21 20:12:20,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:12:20,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:12:20,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-21 20:12:20,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-21 20:12:20,076 INFO L175 Difference]: Start difference. First operand has 529 places, 607 transitions, 8969 flow. Second operand 7 states and 158 transitions. [2024-06-21 20:12:20,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 623 transitions, 10280 flow [2024-06-21 20:12:27,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 623 transitions, 10056 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:12:27,561 INFO L231 Difference]: Finished difference. Result has 530 places, 608 transitions, 9007 flow [2024-06-21 20:12:27,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8746, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9007, PETRI_PLACES=530, PETRI_TRANSITIONS=608} [2024-06-21 20:12:27,562 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 489 predicate places. [2024-06-21 20:12:27,562 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 608 transitions, 9007 flow [2024-06-21 20:12:27,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:27,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:27,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:27,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-21 20:12:27,563 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:12:27,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:27,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1219989003, now seen corresponding path program 25 times [2024-06-21 20:12:27,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:27,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489401165] [2024-06-21 20:12:27,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:27,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:27,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:27,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489401165] [2024-06-21 20:12:27,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489401165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:27,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:27,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:12:27,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338502208] [2024-06-21 20:12:27,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:27,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:12:27,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:27,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:12:27,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:12:27,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:12:27,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 608 transitions, 9007 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:27,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:27,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:12:27,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:30,236 INFO L124 PetriNetUnfolderBase]: 5514/9205 cut-off events. [2024-06-21 20:12:30,236 INFO L125 PetriNetUnfolderBase]: For 2672022/2672025 co-relation queries the response was YES. [2024-06-21 20:12:30,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87403 conditions, 9205 events. 5514/9205 cut-off events. For 2672022/2672025 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 66781 event pairs, 1638 based on Foata normal form. 10/9210 useless extension candidates. Maximal degree in co-relation 87175. Up to 8497 conditions per place. [2024-06-21 20:12:30,396 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 564 selfloop transitions, 63 changer transitions 0/634 dead transitions. [2024-06-21 20:12:30,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 634 transitions, 10366 flow [2024-06-21 20:12:30,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:12:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:12:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-21 20:12:30,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-06-21 20:12:30,397 INFO L175 Difference]: Start difference. First operand has 530 places, 608 transitions, 9007 flow. Second operand 11 states and 236 transitions. [2024-06-21 20:12:30,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 634 transitions, 10366 flow